Low metallicity and ultra-luminous X-ray sources in the Cartwheel galaxy

Details Low metallicity and ultra-luminous X-ray sources in the Cartwheel galaxy Low metallicity and ultra-luminous X-ray sources in the Cartwheel galaxy

2009-02-20

arxiv.org/abs/0902.3540v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, 1 figure, accepted for publication in MNRAS Letters

Scientific paper

10.1111/j.1745-3933.2009.00645.x

Low-metallicity (Z <~ 0.05 Zsun) massive (>~40 Msun) stars might end their life by directly collapsing into massive black holes (BHs, 30 <~ m_BH/Msun <~ 80). More than ~10^5 massive BHs might have been generated via this mechanism in the metal-poor ring galaxy Cartwheel, during the last ~10^7 yr. We show that such BHs might power most of the ultra-luminous X-ray sources (ULXs) observed in the Cartwheel. We also consider a sample of ULX-rich galaxies and we find a possible anti-correlation between the number of ULXs per galaxy and the metallicity in these galaxies. However, the data are not sufficient to draw any robust conclusions about this anti-correlation, and further studies are required.

Affiliated with

Also associated with

No associations

Rating

Low metallicity and ultra-luminous X-ray sources in the Cartwheel galaxy 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 Low metallicity and ultra-luminous X-ray sources in the Cartwheel galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low metallicity and ultra-luminous X-ray sources in the Cartwheel galaxy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-671027