Figure 3 · point file
HaloSat disk+halo extrapolation:数据点推理
HaloSat disk+halo extrapolation: point reasoning
kaaret2020_halosat_disk_halo_m31_extrapolation
Figure 3最终值
Final Figure 3 value
0.5653859650.526442031 – 0.57770987810−15 erg cm−2 s−1 arcmin−2
十四场全部域外;仅supplemental extrapolation。
All fourteen fields are out of domain; this is only a supplemental extrapolation.
原文输入量
Native published input
73个b<-30 deg HaloSat EM拟合的empirical disk+adiabatic halo。
Empirical-disk-plus-adiabatic-halo fit to 73 HaloSat EM fields at b<-30 deg.
转换链
Conversion chain
按catalog-closed integral(n_d+n_h)^2投影M31,补充median kT、HI4PI和TBabs。
Project to M31 with the catalog-closed integral(n_d+n_h)^2 convention, adding median kT, HI4PI, and TBabs.
- 采用paper joint fit的exponential disk加Fang et al. adiabatic NFW-polytrope halo;parent constraints来自73个b<-30 deg HaloSat EM fields。Adopt the paper's joint exponential-disk plus Fang et al. adiabatic NFW-polytrope halo fit, constrained by 73 HaloSat EM fields at b<-30 deg.
- 沿每个M31 field积分paper catalog所闭合的n^2 convention,并保留disk--halo cross term;因为fitted n的particle identity未定义,不再乘1.2。Integrate the catalog-closed n^2 convention along each M31 field and retain the disk--halo cross term; because the particle identity of fitted n is undefined, do not add a factor of 1.2.
EM = ∫(n_disk + n_halo)^2 ds - paper未给M31方向temperature;本项目采用HaloSat median kT=0.225 keV,配APEC 3.0.9、TBabs和field-specific HI4PI转absorbed 0.5--2,并用observed weights汇总。The paper gives no temperature toward M31; this project adopts the HaloSat median kT=0.225 keV, APEC 3.0.9, TBabs, and field-specific HI4PI to obtain absorbed 0.5--2 brightness and combines fields with the observed weights.
新增假设与边界
Added assumptions and boundaries
- fitted n的particle identity未知,不增加1.2 composition factor。The particle identity of fitted n is unspecified, so no extra 1.2 composition factor is applied.