仪器与数据

Instrument and data

Suzaku XIS archival diffuse-background observations，spectral fitting区分Local Bubble/SWCX、约0.22 keV MWH、约0.8 keV额外component和CXB。Figure 3只转移约0.22 keV MWH disk。

Archival Suzaku XIS diffuse-background observations, with spectral fits separating Local Bubble/SWCX, the approximately 0.22 keV MWH, an additional approximately 0.8 keV component, and CXB. Figure 3 transfers only the approximately 0.22 keV MWH disk.

观测视线与样本域

Sightlines and sample domain

130场parent sample覆盖75<l<285 deg、|b|>15 deg。25场|b|>35 deg high-latitude uniform subset是另一个selection。本文采用Table 3的2005-2009、|l|>105 deg、N=36 row；M31十四场l约119.5-122.3 deg且|b|约19.9-23.2 deg，位于该角域内但不在25场uniform subset。

The 130-field parent sample covers 75<l<285 deg and |b|>15 deg. The 25-field high-latitude uniform subset at |b|>35 deg is a separate selection. We adopt the Table 3 row for 2005-2009, |l|>105 deg, N=36; the fourteen M31 fields at l about 119.5-122.3 deg and |b| about 19.9-23.2 deg are inside that angular domain but not the 25-field uniform subset.

原文测量量

Native measurement

native quantity是通过absorbed phabs thermal spectrum推断的MWH emission measure EM=integral n_e n_H ds，不是直接观测的broadband surface brightness。

The native quantity is MWH emission measure, EM=integral n_e n_H ds, inferred through an absorbed phabs thermal spectrum rather than a directly observed broadband surface brightness.

原文模型

Published model

Table 3 adopted row给n_e0=(3.4+/-0.1)e-3 cm-3，固定R0=7.0 kpc、z0=2.7 kpc；disk law写作n=n0 exp(-R/R0) exp(-z/z0)。该row的chi2/dof=36/35。本项目有意采用这个N=36 disk-only row，而不是同一selection下统计量略优的disk+spherical composite row。

The adopted Table 3 row gives n_e0=(3.4+/-0.1)e-3 cm-3 with fixed R0=7.0 kpc and z0=2.7 kpc; the disk law is printed as n=n0 exp(-R/R0) exp(-z/z0). This row has chi2/dof=36/35. The project intentionally selects this N=36 disk-only row rather than the slightly better-fitting disk-plus-spherical composite row for the same selection.

原文结果

Published results

论文高纬uniform subset给出约kT=0.22 keV、EM约2e-3 cm-6 pc；Figure 3采用的空间normalization来自不同的Table 3 N=36 disk fit，不能把两项selection混写。

The high-latitude uniform subset yields approximately kT=0.22 keV and EM around 2e-3 cm-6 pc. The spatial normalization used in Figure 3 instead comes from the separate Table 3 N=36 disk fit; the two selections must not be conflated.

如何进入M31 Figure 3

Transfer into M31 Figure 3

本项目补充midplane symmetry |z|、n_e/n_H=1.2、R_sun=8.2 kpc和内部observer LOS transform；逐场积分n_e n_H到M31十四场，再用Lodders APEC(kT=0.22,Z=1)*phabs(HI4PI)转换为absorbed 0.5-2.0。按观测total相同weights得到0.311904，footprint 0.289468-0.320667；只变化n0边际误差给0.272690-0.339807。

The project adds midplane symmetry |z|, n_e/n_H=1.2, R_sun=8.2 kpc, and an internal-observer LOS transform; it integrates n_e n_H through each of fourteen M31 fields and converts with Lodders APEC(kT=0.22,Z=1)*phabs(HI4PI) to absorbed 0.5-2.0. Using the same weights as the observed total gives 0.311904 with footprint 0.289468-0.320667; varying only the marginal n0 error gives 0.272690-0.339807.

假设与解释边界

Assumptions and boundaries

|z|、composition ratio、Solar radius和observer transform是本项目augmentations；footprint与n0 sensitivity不是joint posterior。约0.8 keV component未进入Figure 3。

The |z| symmetry, composition ratio, Solar radius, and observer transform are project augmentations. Footprint spread and n0 sensitivity are not a joint posterior. The approximately 0.8 keV component is omitted from Figure 3.

本论文对应的Figure 3数据点

Figure 3 points from this study

Primary-source证据地图

Primary-source evidence map

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