{ "schema_version": "1.0", "presentations": [ { "study_id": "henley-shelton-2013", "presentation": { "duration_minutes": 5, "take_home": { "zh": "Henley & Shelton给出的是高银纬XMM-Newton视线的Milky-Way halo brightness population，不是M31方向的局部前景测量。把86个可转换detections逐条改写到absorbed 0.5–2.0 keV后，median为0.384610、IQR为0.273548–0.549082；这些宽度描述不同天空视线的population variation，不能当成M31-direction confidence interval。", "en": "Henley & Shelton provide a Milky-Way halo-brightness population from high-latitude XMM-Newton sightlines, not a local foreground measurement toward M31. Converting 86 usable detections individually to absorbed 0.5–2.0 keV gives a median of 0.384610 and an IQR of 0.273548–0.549082. Those widths describe population variation across different sightlines, not a confidence interval for the M31 direction." }, "metrics": [ { "value": "86 detections", "label": {"zh": "可转换高纬视线", "en": "Convertible high-latitude sightlines"}, "note": {"zh": "87个detections中排除没有唯一LAB N_H的Seq=103。", "en": "Seq=103 is excluded from 87 detections because it lacks a unique LAB N_H."} }, { "value": "0.384610", "label": {"zh": "absorbed population median", "en": "Absorbed population median"}, "note": {"zh": "单位为10^-15 erg cm^-2 s^-1 arcmin^-2；不是M31 local prior。", "en": "In 10^-15 erg cm^-2 s^-1 arcmin^-2; not a local M31 prior."} }, { "value": "0.273548–0.549082", "label": {"zh": "population IQR", "en": "Population IQR"}, "note": {"zh": "跨视线分布，不是measurement uncertainty。", "en": "A cross-sightline distribution, not measurement uncertainty."} }, { "value": "0.246097–0.690362", "label": {"zh": "population p16–p84", "en": "Population p16–p84"}, "note": {"zh": "只作为非同向sky context。", "en": "Used only as non-co-directional sky context."} }, { "value": "b≈−21.6°", "label": {"zh": "M31 Galactic latitude", "en": "M31 Galactic latitude"}, "note": {"zh": "M31位于paper高银纬sample domain外。", "en": "M31 lies outside the paper's high-latitude sample domain."} }, { "value": "0.964727", "label": {"zh": "实测M31 CGMsum总量", "en": "Measured M31 CGMsum total"}, "note": {"zh": "它是line-of-sight sum，不能直接减去population median后宣称M31 detection。", "en": "It is a line-of-sight sum; subtracting a population median does not establish an M31 detection."} } ], "talk_track": [ { "time": "0:00–0:45", "title": {"zh": "先说它能回答什么", "en": "Start with what it can answer"}, "body": {"zh": "这项研究回答高银纬Milky-Way halo brightness在不同XMM-Newton sightlines上有多宽的population分布。它能提供foreground量级背景，但不能给M31低纬方向一个local、同向的foreground measurement。", "en": "This study measures how broadly Milky-Way halo brightness varies across high-latitude XMM-Newton sightlines. It supplies foreground scale context, but not a local, co-directional foreground measurement for M31 at lower latitude."} }, { "time": "0:45–1:45", "title": {"zh": "原论文的native observable", "en": "The paper's native observable"}, "body": {"zh": "作者统一处理EPIC-MOS diffuse-background spectra，剔除点源并联合拟合local foreground、吸收后的Raymond-Smith halo、CXB、instrumental lines和soft protons。catalog量是intrinsic 0.5–2.0 keV halo surface brightness、temperature与LAB N_H。", "en": "The authors process EPIC-MOS diffuse-background spectra uniformly, remove point sources, and jointly fit local foreground, an absorbed Raymond-Smith halo, CXB, instrumental lines, and soft protons. The catalog quantities are intrinsic 0.5–2.0 keV halo surface brightness, temperature, and LAB N_H."} }, { "time": "1:45–2:45", "title": {"zh": "sample与domain边界", "en": "Sample and domain boundary"}, "body": {"zh": "主catalog有110行和87个halo detections；Figure 3只用86个有唯一N_H的detections。M31的b约−21.6°不在高纬sample domain内，而且paper没有发布可在M31 footprint逐场积分的3D density posterior。", "en": "The main catalog has 110 rows and 87 halo detections; Figure 3 uses the 86 detections with unique N_H. M31 at b about −21.6 degrees lies outside the high-latitude domain, and the paper publishes no 3D density posterior that can be evaluated field by field over the M31 footprint."} }, { "time": "2:45–4:00", "title": {"zh": "如何进入共同Figure 3 band", "en": "How it enters the common Figure 3 band"}, "body": {"zh": "每条视线保留自己的published temperature与LAB N_H，用XSraymond*XSphabs、angr abundance和bcmc cross-sections计算absorbed/intrinsic比例，再乘各自intrinsic brightness。之后才对86个converted values取median、IQR和p16–p84。", "en": "Each sightline retains its published temperature and LAB N_H. XSraymond*XSphabs with angr abundances and bcmc cross-sections gives its absorbed-to-intrinsic ratio, which multiplies its intrinsic brightness. The median, IQR, and p16–p84 are then taken over the 86 converted values."} }, { "time": "4:00–5:00", "title": {"zh": "安全结论", "en": "Safe conclusion"}, "body": {"zh": "median 0.384610说明高纬MW halo population的典型量级低于M31方向实测总量0.964727，但二者不共线。IQR与percentiles不能升级成M31-direction uncertainty，也不能把median当作无误差foreground subtraction。", "en": "The median 0.384610 shows that the typical high-latitude MW-halo population scale is below the measured M31-direction total of 0.964727, but the samples are not co-directional. The IQR and percentiles cannot become an M31-direction uncertainty, and the median cannot be used as an error-free foreground subtraction."} } ], "figures": [ { "src": "assets/figures/draft_figure3_consistency_test_2col.png", "download": "assets/figures/draft_figure3_consistency_test_2col.pdf", "title": {"zh": "H&S13在linear contribution plane中的位置", "en": "H&S13 in the linear contribution plane"}, "caption": {"zh": "灰色guide是converted population median；水平range bar保留IQR与p16–p84的population语义。它不是M31方向的local prior band。", "en": "The gray guide marks the converted population median; horizontal range bars preserve the population meanings of the IQR and p16–p84. It is not a local prior band toward M31."} }, { "src": "assets/figures/draft_figure3_consistency_test_loglog_2col.png", "download": "assets/figures/draft_figure3_consistency_test_loglog_2col.pdf", "title": {"zh": "正象限log view中的population context", "en": "Population context in the positive-quadrant log view"}, "caption": {"zh": "log view同时显示MW comparators、observed total与M31 conditional templates，强调同一x轴上的guide并不共享相同evidence class。", "en": "The log view places MW comparators, the observed total, and conditional M31 templates together while emphasizing that guides on the same x axis do not share an evidence class."} }, { "src": "assets/figures/henley_population_diagnostic_2col.png", "download": "assets/figures/henley_population_diagnostic_2col.pdf", "title": {"zh": "86条视线的native-to-absorbed population转换", "en": "Native-to-absorbed conversion for 86 sightlines"}, "caption": {"zh": "上图逐视线显示intrinsic与absorbed brightness并按LAB N_H着色；下图ECDF分别标出median、IQR与p16–p84。所有宽度都是population variation，不是M31-direction uncertainty。", "en": "The upper panel maps intrinsic to absorbed brightness sightline by sightline and colors points by LAB N_H. The ECDF below marks the median, IQR, and p16–p84 separately. Every width is population variation, not uncertainty toward M31."} } ], "flow": [ {"step": "1", "title": {"zh": "catalog fit", "en": "Catalog fit"}, "detail": {"zh": "每条高纬视线的intrinsic halo brightness", "en": "Intrinsic halo brightness for each high-latitude sightline"}, "formula": "S_int,i, kT_i, N_H,i"}, {"step": "2", "title": {"zh": "absorption conversion", "en": "Absorption conversion"}, "detail": {"zh": "逐视线保留temperature与LAB N_H", "en": "Retain each temperature and LAB N_H"}, "formula": "S_abs,i = S_int,i × R_i"}, {"step": "3", "title": {"zh": "sample filter", "en": "Sample filter"}, "detail": {"zh": "只保留唯一N_H的detections", "en": "Keep detections with unique N_H"}, "formula": "N = 86"}, {"step": "4", "title": {"zh": "population summary", "en": "Population summary"}, "detail": {"zh": "median、IQR与percentiles", "en": "Median, IQR, and percentiles"}, "formula": "median = 0.384610"}, {"step": "5", "title": {"zh": "evidence label", "en": "Evidence label"}, "detail": {"zh": "保留为non-local population comparator", "en": "Retain as a non-local population comparator"}, "formula": "not an M31 prior"} ] } }, { "study_id": "ponti-efeds-2023", "presentation": { "duration_minutes": 5, "take_home": { "zh": "Ponti et al.在远离M31的eFEDS深场给出negligible与high-SWCX两套固定系统情景。把Table 4重建到absorbed 0.5–2.0 keV后得到0.406510与0.291208；这两个值是共同band中的distant-sky scenarios，不是一个central value的confidence interval，也不是M31方向prior。", "en": "Ponti et al. provide fixed negligible- and high-SWCX systematic scenarios in the eFEDS deep field, far from M31. Reconstructing Table 4 in absorbed 0.5–2.0 keV gives 0.406510 and 0.291208. These are distant-sky scenarios in a common band, not a confidence interval around one central value and not a prior toward M31." }, "metrics": [ {"value": "107.5 deg²", "label": {"zh": "eFEDS survey area", "en": "eFEDS survey area"}, "note": {"zh": "位于western sky，距M31超过105°。", "en": "In the western sky, more than 105 degrees from M31."}}, {"value": "24.1 / 15.6", "label": {"zh": "0.3–0.6 keV CGM bins", "en": "0.3–0.6 keV CGM bins"}, "note": {"zh": "negligible/high SWCX；单位10^-13 erg cm^-2 s^-1 deg^-2。", "en": "Negligible/high SWCX in 10^-13 erg cm^-2 s^-1 deg^-2."}}, {"value": "5.6 / 4.9", "label": {"zh": "0.6–2.0 keV CGM bins", "en": "0.6–2.0 keV CGM bins"}, "note": {"zh": "Table 4原生published values。", "en": "Native published values from Table 4."}}, {"value": "0.406510", "label": {"zh": "negligible-SWCX重建", "en": "Negligible-SWCX reconstruction"}, "note": {"zh": "absorbed 0.5–2.0 keV common-band value。", "en": "Absorbed 0.5–2.0 keV common-band value."}}, {"value": "0.291208", "label": {"zh": "high-SWCX重建", "en": "High-SWCX reconstruction"}, "note": {"zh": "不是下限或error bar端点。", "en": "Not a lower limit or an error-bar endpoint."}}, {"value": "σ_logNH=0.117", "label": {"zh": "采用的column spread", "en": "Adopted column spread"}, "note": {"zh": "跟随PDF/arXiv；publisher HTML Eq. 1显示0.177。", "en": "Following PDF/arXiv; publisher HTML Eq. 1 displays 0.177."}} ], "talk_track": [ {"time": "0:00–0:45", "title": {"zh": "科学角色", "en": "Scientific role"}, "body": {"zh": "eFEDS不是M31附近control field，而是一个深的distant-sky comparator。它的价值是展示SWCX treatment如何改变同一field中的hot-CGM component，并为共同0.5–2.0 keV轴提供两套明确情景。", "en": "eFEDS is not a control field near M31; it is a deep distant-sky comparator. Its value is to show how SWCX treatment changes the hot-CGM component in one field and to provide two explicit scenarios on the common 0.5–2.0 keV axis."}}, {"time": "0:45–1:45", "title": {"zh": "原文测量与模型", "en": "Native measurement and model"}, "body": {"zh": "eROSITA/eFEDS约107.5 deg² spectroscopy联合拟合unabsorbed Local Hot Bubble、吸收后的CGM、CXB与SWCX。Table 4按0.3–0.6、0.6–2.0和0.3–2.0 keV报告CGM component surface brightness。", "en": "eROSITA/eFEDS spectroscopy over about 107.5 square degrees jointly fits an unabsorbed Local Hot Bubble, absorbed CGM, CXB, and SWCX. Table 4 reports CGM-component surface brightness in 0.3–0.6, 0.6–2.0, and 0.3–2.0 keV."}}, {"time": "1:45–2:45", "title": {"zh": "两列不是error interval", "en": "The two columns are not an error interval"}, "body": {"zh": "negligible与high SWCX是固定systematic scenarios。0.3–0.6 keV分别为24.1/15.6，0.6–2.0 keV为5.6/4.9。connector只把两套模型归组，不能称为一个measurement的confidence range。", "en": "Negligible and high SWCX are fixed systematic scenarios. Their 0.3–0.6 keV values are 24.1/15.6 and their 0.6–2.0 keV values are 5.6/4.9. A connector only groups the two models; it is not a confidence range for one measurement."}}, {"time": "2:45–4:00", "title": {"zh": "common-band重建", "en": "Common-band reconstruction"}, "body": {"zh": "0.5 keV切在Table 4 soft bin内部，因此用published kT/Z的Lodders APEC和lognormal N_H quadrature求F(0.5–0.6)/F(0.3–0.6)，再与published 0.6–2.0 flux相加并从deg²换到arcmin²。", "en": "Because 0.5 keV cuts through the published soft bin, a Lodders APEC model at the published kT/Z plus lognormal N_H quadrature supplies F(0.5–0.6)/F(0.3–0.6). That piece is added to the published 0.6–2.0 flux and converted from square degrees to square arcminutes."}}, {"time": "4:00–5:00", "title": {"zh": "结果与边界", "en": "Result and boundary"}, "body": {"zh": "重建值为high/negligible SWCX=0.291208/0.406510。eFEDS距M31超过105°，没有M31 geometry transfer，也没有localization依据；安全结论仅是不同SWCX情景下的远方sky comparator范围。", "en": "The reconstructed high/negligible-SWCX values are 0.291208/0.406510. eFEDS is more than 105 degrees from M31, with no M31 geometry transfer or localization basis. The safe conclusion is only a distant-sky comparator under different SWCX scenarios."}} ], "figures": [ {"src": "assets/figures/draft_figure3_consistency_test_2col.png", "download": "assets/figures/draft_figure3_consistency_test_2col.pdf", "title": {"zh": "eFEDS fixed scenarios在线性plane中", "en": "eFEDS fixed scenarios in the linear plane"}, "caption": {"zh": "两条紫色guide分别对应high与negligible SWCX；它们是离散systematic scenarios，不是一个连续prior band。", "en": "The two purple guides correspond to high and negligible SWCX. They are discrete systematic scenarios, not a continuous prior band."}}, {"src": "assets/figures/draft_figure3_consistency_test_loglog_2col.png", "download": "assets/figures/draft_figure3_consistency_test_loglog_2col.pdf", "title": {"zh": "log view中的common-band位置", "en": "Common-band position in the log view"}, "caption": {"zh": "log plane显示两套eFEDS values低于observed line-of-sight total，但这种数值关系不消除105°sky separation。", "en": "The log plane shows both eFEDS values below the observed line-of-sight total, but that numerical relation does not erase the 105-degree sky separation."}}, {"src": "assets/figures/efeds_scenario_diagnostic_2col.png", "download": "assets/figures/efeds_scenario_diagnostic_2col.pdf", "title": {"zh": "从Table 4分裂能段到共同band", "en": "From split Table 4 bands to the common band"}, "caption": {"zh": "stacked bars把published 0.6–2.0 flux与model-retained 0.5–0.6 slice分开；下表绑定各情景kT、Z、soft fraction与最终值。两列是fixed scenarios，不是confidence interval。", "en": "Stacked bars separate the published 0.6–2.0 flux from the model-retained 0.5–0.6 slice. The table binds each scenario to kT, Z, soft fraction, and final value. The two columns are fixed scenarios, not a confidence interval."}} ], "flow": [ {"step": "1", "title": {"zh": "Table 4", "en": "Table 4"}, "detail": {"zh": "两套SWCX情景的published bins", "en": "Published bins for two SWCX scenarios"}, "formula": "F_0.3–0.6, F_0.6–2.0"}, {"step": "2", "title": {"zh": "soft-bin split", "en": "Soft-bin split"}, "detail": {"zh": "APEC+disnht重建0.5–0.6", "en": "APEC plus disnht reconstructs 0.5–0.6"}, "formula": "r = F_0.5–0.6/F_0.3–0.6"}, {"step": "3", "title": {"zh": "band sum", "en": "Band sum"}, "detail": {"zh": "加回published 0.6–2.0", "en": "Add the published 0.6–2.0 bin"}, "formula": "F_0.5–2 = rF_soft + F_hard"}, {"step": "4", "title": {"zh": "solid angle", "en": "Solid angle"}, "detail": {"zh": "deg^-2转arcmin^-2", "en": "Convert deg^-2 to arcmin^-2"}, "formula": "÷3600"}, {"step": "5", "title": {"zh": "scenario pair", "en": "Scenario pair"}, "detail": {"zh": "保留两个离散值", "en": "Retain two discrete values"}, "formula": "0.291208 / 0.406510"} ] } }, { "study_id": "ueda-2022", "presentation": { "duration_minutes": 5, "take_home": { "zh": "Ueda et al.的Table 3 N=36 disk-only row提供一个可从太阳内部位置投影到M31十四场的约0.22 keV Milky-Way density model。加入明确的project augmentations并用逐场HI4PI absorption转换后，estimator-matched all-field值为0.311904；footprint 0.289468–0.320667是空间variation，n0范围0.272690–0.339807只是边际sensitivity。", "en": "The Ueda et al. Table 3 N=36 disk-only row provides an approximately 0.22 keV Milky-Way density model that can be projected from the Solar position to fourteen M31 fields. After explicit project augmentations and field-specific HI4PI absorption, the estimator-matched all-field value is 0.311904. The 0.289468–0.320667 footprint is spatial variation, while 0.272690–0.339807 is only marginal n0 sensitivity." }, "metrics": [ {"value": "N=36", "label": {"zh": "采用的Table 3 row", "en": "Adopted Table 3 row"}, "note": {"zh": "2005–2009、|l|>105°的disk-only fit。", "en": "The 2005–2009, |l|>105-degree disk-only fit."}}, {"value": "kT≈0.22 keV", "label": {"zh": "转移的MWH component", "en": "Transferred MWH component"}, "note": {"zh": "约0.8 keV额外component不进入Figure 3。", "en": "The additional approximately 0.8 keV component is not transferred."}}, {"value": "n_e0=3.4×10^-3", "label": {"zh": "disk normalization", "en": "Disk normalization"}, "note": {"zh": "cm^-3；R0=7.0 kpc、z0=2.7 kpc固定。", "en": "cm^-3, with R0=7.0 kpc and z0=2.7 kpc fixed."}}, {"value": "0.311904", "label": {"zh": "all-field MW prediction", "en": "All-field MW prediction"}, "note": {"zh": "与observed total使用相同inverse-variance weights。", "en": "Uses the same inverse-variance weights as the observed total."}}, {"value": "0.289468–0.320667", "label": {"zh": "十四场footprint span", "en": "Fourteen-field footprint span"}, "note": {"zh": "deterministic field variation，不是uncertainty。", "en": "Deterministic field variation, not uncertainty."}}, {"value": "0.272690–0.339807", "label": {"zh": "n0 marginal sensitivity", "en": "Marginal n0 sensitivity"}, "note": {"zh": "只变化n0；不是joint posterior。", "en": "Only n0 is varied; this is not a joint posterior."}} ], "talk_track": [ {"time": "0:00–0:45", "title": {"zh": "为什么Ueda可空间投影", "en": "Why Ueda is spatially projectable"}, "body": {"zh": "与population median不同，Ueda发布了内部observer可积分的exponential disk density law。采用row的角域覆盖M31十四场，所以它能产生field-by-field directional model，但仍需明确本项目增加的geometry与spectral assumptions。", "en": "Unlike a population median, Ueda publish an exponential disk density law that can be integrated for an internal observer. The adopted row's angular domain contains all fourteen M31 fields, so it yields a field-by-field directional model, although project-added geometry and spectral assumptions must remain explicit."}}, {"time": "0:45–1:45", "title": {"zh": "sample hierarchy", "en": "Sample hierarchy"}, "body": {"zh": "130场parent sample覆盖7515°；25场|b|>35°uniform subset是另一selection。Figure 3采用Table 3的2005–2009、|l|>105°、N=36 disk-only row。M31 fields在这个row的角域内，却不在25场uniform subset。", "en": "The 130-field parent sample covers 7515 degrees; the 25-field |b|>35-degree uniform subset is different. Figure 3 adopts the Table 3 2005–2009, |l|>105-degree, N=36 disk-only row. M31 lies inside that row's domain but outside the 25-field uniform subset."}}, {"time": "1:45–2:45", "title": {"zh": "native EM与density model", "en": "Native EM and density model"}, "body": {"zh": "native quantity是absorbed phabs thermal fit推断的EM=∫n_e n_H ds。adopted disk给n_e0=(3.4±0.1)×10^-3 cm^-3、R0=7.0 kpc、z0=2.7 kpc，χ²/dof=36/35。本项目有意不采用统计略好的disk+spherical composite row。", "en": "The native quantity is EM=integral n_e n_H ds inferred from an absorbed phabs thermal fit. The adopted disk has n_e0=(3.4±0.1)e-3 cm^-3, R0=7.0 kpc, z0=2.7 kpc, and chi-square/dof=36/35. The project intentionally does not adopt the slightly better disk-plus-spherical row."}}, {"time": "2:45–4:00", "title": {"zh": "十四场transfer", "en": "Fourteen-field transfer"}, "body": {"zh": "本项目补充|z| midplane symmetry、n_e/n_H=1.2、R_sun=8.2 kpc与Solar-position LOS transform，逐场积分后用Lodders APEC(kT=0.22,Z=1)*phabs(HI4PI)转为absorbed 0.5–2.0，再用CGMsum相同weights汇总。", "en": "The project adds |z| midplane symmetry, n_e/n_H=1.2, R_sun=8.2 kpc, and a Solar-position LOS transform. Field integrals are converted with Lodders APEC(kT=0.22,Z=1)*phabs(HI4PI) to absorbed 0.5–2.0 keV and combined with the same weights as CGMsum."}}, {"time": "4:00–5:00", "title": {"zh": "结果与width语义", "en": "Result and width semantics"}, "body": {"zh": "all-field为0.311904。0.289468–0.320667只反映十四场geometry+absorption variation；0.272690–0.339807只变化n0的边际误差。两者都不能称为joint model uncertainty，约0.8 keV component也未包含。", "en": "The all-field value is 0.311904. The 0.289468–0.320667 span reflects only field geometry plus absorption, while 0.272690–0.339807 varies only the marginal n0 error. Neither is a joint model uncertainty, and the approximately 0.8 keV component is omitted."}} ], "figures": [ {"src": "assets/figures/draft_figure3_consistency_test_2col.png", "download": "assets/figures/draft_figure3_consistency_test_2col.pdf", "title": {"zh": "Ueda directional model在线性plane中", "en": "The Ueda directional model in the linear plane"}, "caption": {"zh": "绿色full-height guide是estimator-matched all-field value；水平bar分别保留footprint与n0 sensitivity，不把二者混成一个uncertainty。", "en": "The green full-height guide is the estimator-matched all-field value. Horizontal bars retain footprint and n0-sensitivity meanings separately rather than merging them into one uncertainty."}}, {"src": "assets/figures/draft_figure3_consistency_test_loglog_2col.png", "download": "assets/figures/draft_figure3_consistency_test_loglog_2col.pdf", "title": {"zh": "Ueda在完整foreground尺度中的位置", "en": "Ueda on the full foreground scale"}, "caption": {"zh": "log view显示Ueda是in-domain target-footprint model，同时与H&S13 population、eFEDS scenarios和域外模型保持不同evidence labels。", "en": "The log view shows Ueda as an in-domain target-footprint model while preserving distinct evidence labels for the H&S13 population, eFEDS scenarios, and out-of-domain models."}}, {"src": "assets/figures/ueda_footprint_diagnostic_2col.png", "download": "assets/figures/ueda_footprint_diagnostic_2col.pdf", "title": {"zh": "十四场directional prediction与matched estimator", "en": "Fourteen directional predictions and the matched estimator"}, "caption": {"zh": "上图分开显示nominal field predictions、deterministic footprint min–max、n0 marginal sensitivity与matched weighted mean；下图给出实际statistical weights。n0 bars不是joint posterior。", "en": "The upper panel separates nominal field predictions, deterministic footprint min–max, marginal n0 sensitivity, and the matched weighted mean. The lower panel shows the actual statistical weights. The n0 bars are not a joint posterior."}} ], "flow": [ {"step": "1", "title": {"zh": "adopted row", "en": "Adopted row"}, "detail": {"zh": "N=36 disk-only parameters", "en": "N=36 disk-only parameters"}, "formula": "n_e=n_e0 e^(−R/R0)e^(−|z|/z0)"}, {"step": "2", "title": {"zh": "内部LOS", "en": "Internal LOS"}, "detail": {"zh": "从太阳位置积分十四场", "en": "Integrate fourteen fields from the Solar position"}, "formula": "EM=∫n_e n_H ds"}, {"step": "3", "title": {"zh": "thermal bridge", "en": "Thermal bridge"}, "detail": {"zh": "kT=0.22、Z=1 APEC", "en": "kT=0.22, Z=1 APEC"}, "formula": "EM → F_0.5–2"}, {"step": "4", "title": {"zh": "field absorption", "en": "Field absorption"}, "detail": {"zh": "逐场HI4PI phabs", "en": "Field-specific HI4PI phabs"}, "formula": "F_i(N_H,i)"}, {"step": "5", "title": {"zh": "matched estimator", "en": "Matched estimator"}, "detail": {"zh": "使用CGMsum inverse-variance weights", "en": "Use CGMsum inverse-variance weights"}, "formula": "0.311904"} ] } }, { "study_id": "kaaret-halosat-2020", "presentation": { "duration_minutes": 5, "take_home": { "zh": "Kaaret et al.的HaloSat morphology fit只使用73个b<−30°南天场；M31十四场全部在fit domain外。按catalog-closed (n_disk+n_halo)^2 convention外推并补充kT/Z/absorption后，all-field值为0.565386、converted patchiness为±0.165165；0.438683的no-cross-term结果是结构检查，不是第二个published model。", "en": "The Kaaret et al. HaloSat morphology fit uses only 73 southern fields at b<−30 degrees, placing all fourteen M31 fields outside its fitted domain. Extrapolation under the catalog-closed (n_disk+n_halo)^2 convention plus added kT/Z/absorption gives an all-field value of 0.565386 and converted patchiness of ±0.165165. The 0.438683 no-cross-term result is a structural check, not a second published model." }, "metrics": [ {"value": "73 fields", "label": {"zh": "morphology fit sample", "en": "Morphology-fit sample"}, "note": {"zh": "全部位于southern sky、b<−30°。", "en": "All in the southern sky at b<−30 degrees."}}, {"value": "17.70°", "label": {"zh": "最近fit center到M31", "en": "Nearest fitted center to M31"}, "note": {"zh": "超过HaloSat约7° zero-response radius。", "en": "Beyond HaloSat's approximately 7-degree zero-response radius."}}, {"value": "0.565386", "label": {"zh": "all-field extrapolation", "en": "All-field extrapolation"}, "note": {"zh": "domain外条件模型，不是direct HaloSat measurement。", "en": "An out-of-domain conditional model, not a direct HaloSat measurement."}}, {"value": "0.526442–0.577710", "label": {"zh": "M31 footprint span", "en": "M31 footprint span"}, "note": {"zh": "geometry+absorption variation。", "en": "Geometry-plus-absorption variation."}}, {"value": "±0.165165", "label": {"zh": "converted patchiness", "en": "Converted patchiness"}, "note": {"zh": "来自published σ_p；不是field min–max。", "en": "From published sigma_p; not a field min–max."}}, {"value": "0.438683", "label": {"zh": "no-cross-term check", "en": "No-cross-term check"}, "note": {"zh": "只检查composite-density convention。", "en": "Only a check of the composite-density convention."}} ], "talk_track": [ {"time": "0:00–0:45", "title": {"zh": "先标domain外", "en": "State the domain mismatch first"}, "body": {"zh": "HaloSat结论来自southern high-latitude morphology fit，而M31在b约−21.6°。十四场全部在b<−30° fit domain外；最近fit center仍距M31 17.70°，所以页面必须从out-of-domain extrapolation开始，而不是称为M31-direction HaloSat measurement。", "en": "The HaloSat result comes from a southern high-latitude morphology fit, whereas M31 is near b=−21.6 degrees. All fourteen fields lie outside the b<−30-degree domain and the nearest fitted center is still 17.70 degrees away, so the page must begin with out-of-domain extrapolation, not an M31-direction HaloSat measurement."}}, {"time": "0:45–1:45", "title": {"zh": "native data与paper结论", "en": "Native data and paper conclusion"}, "body": {"zh": "HaloSat宽视场spectra给每场单温APEC EM与temperature。73个南天场的morphology comparison支持disk-dominated、clumpy hot CGM；final empirical-disk+adiabatic-halo model给χ²约71.7/70与σ_p=3.4×10^-3 cm^-6 pc。", "en": "HaloSat wide-field spectra give one-temperature APEC EM and temperature per field. Morphology comparisons over 73 southern fields support a disk-dominated, clumpy hot CGM; the final empirical-disk-plus-adiabatic-halo model gives chi-square about 71.7/70 and sigma_p=3.4e-3 cm^-6 pc."}}, {"time": "1:45–2:45", "title": {"zh": "关键composite convention", "en": "Critical composite convention"}, "body": {"zh": "catalog closure显示published fit按∫(n_disk+n_halo)^2 ds运行，因此transfer保留disk-halo cross term。论文没有定义fitted n的particle identity，所以不能再额外乘n_e/n_H。去cross term只用于结构敏感性检查。", "en": "Catalog closure shows that the published fit uses integral(n_disk+n_halo)^2 ds, so the transfer retains the disk-halo cross term. The paper does not define the particle identity of fitted n, so no extra n_e/n_H factor is justified. Removing the cross term is only a structural sensitivity check."}}, {"time": "2:45–4:00", "title": {"zh": "M31外推需要的augmentations", "en": "Augmentations required for the M31 extrapolation"}, "body": {"zh": "本项目采用R_sun=8.0 kpc、|z|与0–260 kpc内部LOS。因为density model不预测M31方向temperature，再补sample-median kT=0.225 keV、Z=0.3、Wilms/Verner TBabs及逐场HI4PI，才得到absorbed 0.5–2.0 values。", "en": "The project adopts R_sun=8.0 kpc, |z|, and a 0–260 kpc internal LOS. Because the density model does not predict temperature toward M31, it adds sample-median kT=0.225 keV, Z=0.3, Wilms/Verner TBabs, and field-specific HI4PI before obtaining absorbed 0.5–2.0 keV values."}}, {"time": "4:00–5:00", "title": {"zh": "结果与安全用法", "en": "Result and safe use"}, "body": {"zh": "all-field为0.565386，footprint 0.526442–0.577710，converted patchiness ±0.165165；no-cross-term为0.438683。只能作为supplemental outside-domain model。M31附近HaloSat archive target包含M31 diffuse emission，也不能充当独立MW control。", "en": "The all-field result is 0.565386, the footprint is 0.526442–0.577710, converted patchiness is ±0.165165, and the no-cross-term check is 0.438683. This is only a supplemental outside-domain model. A HaloSat archive target near M31 contains M31 diffuse emission and is not an independent MW control."}} ], "figures": [ {"src": "assets/figures/draft_figure3_consistency_test_2col.png", "download": "assets/figures/draft_figure3_consistency_test_2col.pdf", "title": {"zh": "HaloSat supplemental extrapolation在线性plane中", "en": "HaloSat supplemental extrapolation in the linear plane"}, "caption": {"zh": "青色虚线guide是all-field extrapolation；水平bar分别表达footprint与patchiness。图例明确保留supplemental/out-of-domain标签。", "en": "The cyan dashed guide is the all-field extrapolation. Horizontal bars separately encode footprint and patchiness, while the legend retains the supplemental/out-of-domain label."}}, {"src": "assets/figures/draft_figure3_consistency_test_loglog_2col.png", "download": "assets/figures/draft_figure3_consistency_test_loglog_2col.pdf", "title": {"zh": "log view中的HaloSat条件尺度", "en": "The conditional HaloSat scale in the log view"}, "caption": {"zh": "log plane便于与Ueda、H&S13和eFEDS比较数值尺度，但不能把domain外model提升为与in-domain Ueda相同证据等级。", "en": "The log plane supports scale comparison with Ueda, H&S13, and eFEDS, but it does not promote the out-of-domain model to the evidence class of in-domain Ueda."}}, {"src": "assets/figures/halosat_footprint_diagnostic_2col.png", "download": "assets/figures/halosat_footprint_diagnostic_2col.pdf", "title": {"zh": "域外footprint外推与cross-term结构检查", "en": "Out-of-domain footprint extrapolation and cross-term check"}, "caption": {"zh": "十四场全部明确标为fit domain外；上图把cross-term nominal、no-cross structural check与converted predictor scatter分开，下图显示cross-term share。透明竖线不是measurement CI。", "en": "All fourteen fields are explicitly marked outside the fitted domain. The upper panel separates the cross-term nominal prediction, the no-cross structural check, and converted predictor scatter; the lower panel shows the cross-term share. The translucent bars are not measurement confidence intervals."}} ], "flow": [ {"step": "1", "title": {"zh": "southern fit", "en": "Southern fit"}, "detail": {"zh": "73场EM morphology", "en": "EM morphology over 73 fields"}, "formula": "b<−30°"}, {"step": "2", "title": {"zh": "composite density", "en": "Composite density"}, "detail": {"zh": "保留catalog-closed cross term", "en": "Retain the catalog-closed cross term"}, "formula": "EM=∫(n_d+n_h)² ds"}, {"step": "3", "title": {"zh": "domain extrapolation", "en": "Domain extrapolation"}, "detail": {"zh": "内部LOS延伸到M31 fields", "en": "Extend internal LOS to M31 fields"}, "formula": "0