SIMBAD references

2017MNRAS.466.1019S - Mon. Not. R. Astron. Soc., 466, 1019-1051 (2017/March-3)

Bright end of the luminosity function of high-mass X-ray binaries: contributions of hard, soft and supersoft sources.


Abstract (from CDS):

Using a spectral analysis of bright Chandra X-ray sources located in 27 nearby galaxies and maps of star-formation rate (SFR) and interstellar medium surface densities for these galaxies, we constructed the intrinsic X-ray luminosity function (XLF) of luminous high-mass X-ray binaries (HMXBs), taking into account absorption effects and the diversity of HMXB spectra. The XLF per unit SFR can be described by a power-law dN/dlog LX,unabs ≃ 2.0(LX,unabs/1039 erg s–1)–0.6 (M yr–1)–1 from LX,unabs = 1038 to 1040.5 erg s–1, where LX,unabs is the unabsorbed luminosity at 0.25-8 keV. The intrinsic number of luminous HMXBs per unit SFR is a factor of ∼2.3 larger than the observed number reported before. The intrinsic XLF is composed of hard, soft and supersoft sources (defined here as those with the 0.25-2 keV to 0.25-8 keV flux ratio of <0.6, 0.6-0.95 and >0.95, respectively) in ∼ 2:1:1 proportion. We also constructed the intrinsic HMXB XLF in the soft X-ray band (0.25-2 keV). Here, the numbers of hard, soft and supersoft sources prove to be nearly equal. The cumulative present-day 0.25-2 keV emissivity of HMXBs with luminosities between 1038 and 1040.5 erg s–1 is ∼5 x 1039 erg s–1(M yr–1)–1, which may be relevant for studying the X-ray preheating of the early Universe.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: massive - galaxies: star formation - early Universe - X-rays: binaries - X-rays: galaxies - X-rays: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/466/1019): table2.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 57

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