SIMBAD references

2003MNRAS.344..134H - Mon. Not. R. Astron. Soc., 344, 134-148 (2003/September-1)

Ultraluminous X-ray source populations in normal galaxies: a preliminary survey with Chandra.


Abstract (from CDS):

We present results of a Chandra survey of the ultraluminous X-ray sources (ULX) in 13 normal galaxies, in which we combine source detection with X-ray flux measurement. 22 ULX were detected, i.e. with Lx> 1x1039erg.s–1(L10) and 39 other sources were detected with Lx>5x1038erg.s–1(L5). We also use radial intensity profiles to remove extended sources from the sample. The majority of sources are not extended, which for a typical distance constrains the emission region size to less than 50 pc. X-ray colour-colour diagrams and spectral fitting results were examined for indicators of the ULX nature. In the case of the brighter sources, spectral fitting generally requires two-component models. In only a few cases do colour-colour diagrams or spectral fitting provide evidence of a black hole nature. We find no evidence of a correlation with stellar mass, however, there is a strong correlation with star formation as indicated by the 60-µm flux as found in previous studies.

Abstract Copyright: 2003 RAS

Journal keyword(s): accretion, accretion discs - black hole physics - binaries: close - X-rays: galaxies - X-rays: stars

VizieR on-line data: <Available at CDS (J/MNRAS/344/134): table12.dat table3.dat table4.dat table5.dat>

Nomenclature: Table 4: [HFE2003] NGC NNNN PSX-NN N=59, [HFE2003] IZW18 PSX-N No. 1), [HFE2003] IC 2574 PSX-N (No. 1). Table 5: [HFE2003] NGC NNNN ESX-NN N=10.

Simbad objects: 88

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