SIMBAD references

2020MNRAS.498.4790K - Mon. Not. R. Astron. Soc., 498, 4790-4810 (2020/November-2)

A census of ultraluminous X-ray sources in the local Universe.

KOVLAKAS K., ZEZAS A., ANDREWS J.J., BASU-ZYCH A., FRAGOS T., HORNSCHEMEIER A., LEHMER B. and PTAK A.

Abstract (from CDS):

Using the Chandra Source Catalog 2.0 and a newly compiled catalogue of galaxies in the local Universe, we deliver a census of ultraluminous X-ray source (ULX) populations in nearby galaxies. We find 629 ULX candidates in 309 galaxies with distance smaller than 40 Mpc. The foreground/background contamination is ∼20 per cent. The ULX populations in bona fide star-forming galaxies scale on average with star formation rate and stellar mass (M*) such that the number of ULXs per galaxy is 0.45+0.06–0.09×S/FR Myr-1+3.3+3.8^–3.2×\fracM*_ M. The scaling depends strongly on the morphological type. This analysis shows that early spiral galaxies contain an additional population of ULXs that scales with M*. We also confirm the strong anticorrelation of the ULX rate with the host galaxy's metallicity. In the case of early-type galaxies, we find that there is a non-linear dependence of the number of ULXs with M*, which is interpreted as the result of star formation history differences. Taking into account age and metallicity effects, we find that the predictions from X-ray binary population synthesis models are consistent with the observed ULX rates in early-type galaxies, as well as spiral/irregular galaxies.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: statistical - catalogues - X-rays: binaries - X-rays: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/498/4790): table1.dat table2.dat>

Status at CDS : Tables of objects mostly ingested in SIMBAD; some problems could not be solved.

Simbad objects: 2219

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