Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-05-19
Mon.Not.Roy.Astron.Soc.344:134,2003
Astronomy and Astrophysics
Astrophysics
16 pages including 7 figures, MNRAS accepted
Scientific paper
10.1046/j.1365-8711.2003.06802.x
We present results of a Chandra survey of the ultra-luminous 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 L_x > 1 x 10^{39} erg s^{-1} (L_10), and 39 other sources were detected with L_x > 5 x 10^{38} erg s^{-1} (L_5). 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 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 micron flux as found in previous studies.
Balucinska-Church Monika
Church M. J.
Elvis Martin
Fabbiano Giuseppina
Humphrey Philip J.
No associations
LandOfFree
Ultra-Luminous X-ray Source Populations in Normal Galaxies: a Preliminary Survey with Chandra does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ultra-Luminous X-ray Source Populations in Normal Galaxies: a Preliminary Survey with Chandra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultra-Luminous X-ray Source Populations in Normal Galaxies: a Preliminary Survey with Chandra will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-547305