Chandra observations of the globular cluster M54

Details Chandra observations of the globular cluster M54 Chandra observations of the globular cluster M54

2005-10-07

arxiv.org/abs/astro-ph/0510217v1

Astronomy and Astrophysics

Astrophysics

Accepted A&A, 5 pages

Scientific paper

10.1051/0004-6361:20053855

We have carried out a Chandra observation of the globular cluster M54. We detected 7 sources located within the half-mass radius of M54, at a flux limit of 1.5x10^-15 erg/s/cm in the 0.3-8 keV energy band. The spatial distribution and the colour/spectral properties of the 7 sources suggest that they are likely to be cataclysmic variables or LMXBs in the globular cluster. M54 shows the largest number of X-ray sources with luminosities greater than 10^32 ergs/s compared to other globular clusters observed using Chandra and XMM-Newton. We searched for a correlation between the number of sources above this luminosity level with globular cluster parameters. We found evidence that the number of sources peaks at a King concentration parameter c~1.7-1.9, with globular clusters which are core-collapsed or have low-c values having a smaller number of sources. We speculate on possible reasons for this.

Affiliated with

Also associated with

No associations

Rating

Chandra observations of the globular cluster M54 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 Chandra observations of the globular cluster M54, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chandra observations of the globular cluster M54 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-560772