J/A+A/564/A107 Galactic ridge X-ray emission (Molaro+, 2014)
A thin diffuse component of the Galactic ridge X-ray emission and heating of the
interstellar medium contributed by the radiation of Galactic X-ray binaries.
Molaro M., Khatri R., Sunyaev R.A.
<Astron. Astrophys., 564, A107-107 (2014)>
=2014A&A...564A.107M 2014A&A...564A.107M
ADC_Keywords: Binaries, X-ray
Keywords: scattering - X-rays: binaries - X-rays: ISM - X-rays: general -
atomic processes - X-rays: stars - X-rays: stars
Abstract:
We predict a thin diffuse component of the Galactic ridge X-ray
emission (GRXE) arising from the scattering of the radiation of bright
X-ray binaries (XBs) by the interstellar medium. This scattered
component has the same scale height as that of the gaseous disk
(∼80pc) and is therefore thinner than the GRXE of stellar origin
(scale height ∼130pc). The morphology of the scattered component is
furthermore expected to trace the clumpy molecular and HI clouds.
We calculate this contribution to the GRXE from known Galactic XBs
assuming that they are all persistent. The known XBs sample is
incomplete, however, because it is flux limited and spans the lifetime
of X-ray astronomy (∼50-years), which is very short compared with the
characteristic time of 1000-10000 years that would have contributed to
the diffuse emission observed today due to time delays. We therefore
also use a simulated sample of sources, to estimate the diffuse
emission we should expect in an optimistic case assuming that the
X-ray luminosity of our Galaxy is on average similar to that of other
galaxies. In the calculations we also take into account the
enhancement of the total scattering cross-section due to coherence
effects in the elastic scattering from multi-electron atoms and
molecules.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 83 205 List of sources used in the calculations,
ranked by 2-10keV luminosity
refs.dat 103 80 References
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See also:
J/A+A/469/807 : Catalogue of Galactic low-mass X-ray binaries (Liu+, 2007)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Source X-ray source name
23- 24 A2 --- Type [HM LM] Type: LM for Low-Mass X-ray Binary
(LMXB), HM for High-mass binary (HMXB)
26- 33 F8.4 deg GLON Galactic longitude
35- 42 F8.4 deg GLAT Galactic latitude
44- 49 F6.3 kpc Dist Distance
52- 59 E8.3 10-7W L2-10 ?=- X-ray luminosity in 2-10keV band
61- 68 E8.3 10-7W L17-60 ?=- X-ray luminosity in 17-60keV band
70- 73 F4.2 --- Gamma ?=- Photon index Γ
75- 76 I2 --- r_Dist ? Reference for Dist, in refs.dat file
78 I1 --- r_L2-10 ? Reference for L2-10keV, in refs.dat file
80 I1 --- r_L17-60 ? Reference for L17-60keV, in refs.dat file
82- 83 I2 --- r_Gamma ? Reference for Gamma, in refs.dat file
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 44 A21 --- Aut Author's name
46-103 A58 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Jun-2014