SFGALHMXB - Star-Forming Galaxies High-Mass X-Ray Binaries Catalog
This table contains the catalog of 1055 compact X-ray sources detected within the D25 ellipse for galaxies of this sample which the authors used to construct the average X-ray luminosity function (XLF) of HMXBs with substantially improved statistical accuracy and better control of systematic effects than achieved in previous studies. The XLF follows a power law with slope of 1.6 in the log(LX) ~ 35 - 40 luminosity range with a moderately significant evidence for a break or cut-off at LX ~ 1040 erg/s. As before, the authors did not find any features at the Eddington limit for a neutron star or a stellar mass black hole.
In their paper, the authors discuss the implications of their results for the theory of binary evolution. In particular, they estimate the fraction of compact objects that once during their lifetime experienced an X-ray active phase powered by accretion from a high mass companion and obtain a rather large number, fX ~ 0.2 x (0.1 Myr/taux), where taux is the life time of the X-ray active phase. This is about 4 orders of magnitude more frequent than in low-mass X-ray binaries (LMXBs). The authors also derive constrains on the mass distribution of the secondary star in HMXBs.
Note that, in their paper, the authors estimate that ~ 300 of the 1055 sources are likely to be background AGNs (cosmic X-ray background or CXB sources) and that the majority (<~ 700) of the remaining ~ 750 sources are young HMXB systems associated with star formation in their host galaxies.
X-ray emission from star-forming galaxies. I. High-mass X-ray binaries. Mineo S., Gilfanov M., Sunyaev R. <Mon. Not. R. Astron. Soc. 419, 2095 (2012)> =2012MNRAS.419.2095M
The name of the host galaxy. The properties of the galaxies are given in Table 1 of the reference paper and are available in machine readable form at http://cdsarc.u-strasbg.fr/ftp/cats/J_MNRAS/419/2095/ in the file sfgal.dat.
The source number of the X-ray source within the specified galaxy. The sources are numbered in order of increasing radial offset from the galaxy center, i.e., source number 1 is the innermost.
The Chandra X-Ray Observatory position-based source designation (CXO/CXOU JHHMMSS.s-DDMMSS), according to the usual naming conventions, where 'CXOU' is used for "unregistered" sources found by the authors, and 'CXO' is used for sources that were matched with the Chandra Source Catalog (CSC).
The Right Ascension of the X-ray source in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10-5 degrees in the original table.
The Declination of the X-ray source in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10-5 degrees in the original table.
The Galactic Longitude of the X-ray source.
The Galactic Latitude of the X-ray source.
The radial distance of the X-ray source from the center of the host galaxy, in arcseconds.
The net number of X-ray source counts after background subtraction calculated as described in Section 3.2 of the reference paper.
The rms statistical uncertainty in the net number of X-ray source counts calculated as described in Section 3.2 of the reference paper.
The logarithm of the source X-ray flux, measured in the 0.5 - 8 keV band and as described in Section 3.2 of the reference paper, in erg s-1 cm-2.
The logarithm of the source X-ray luminosity, measured in the 0.5 - 8 keV band and as described in Section 3.2 of the reference paper, in erg s-1.
This flag parameter indicates the location of the X-ray source, coded as follows:
1 = point sources detected in the galactic area dominated by the high-mass X-ray binary (HMXB) population 2 = point sources detected in the outer region dominated by CXB sources 3 = point sources detected in the galactic bulge and assumed to be low-mass X-ray binaries (LMXBs)