Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-14
Astrophys.J.647:1065-1074,2006
Astronomy and Astrophysics
Astrophysics
11 pages, 6 figures; accepted for publication in ApJ
Scientific paper
10.1086/505485
We report on the Chandra X-ray Observatory observations of the globular cluster NGC 288. We detect four X-ray sources within the core radius and seven additional sources within the half-mass radius down to a limiting luminosity of Lx=7e30 erg/s (assuming cluster membership) in the 0.3-7 keV band. We also observed the cluster with the Hubble Space Telescope Advanced Camera for Surveys and identify optical counterparts to seven X-ray sources out of the nine sources within the HST field-of-view. Based on the X-ray and optical properties, we find 2-5 candidates of cataclysmic variables (CVs) or chromospherically active binaries, and 2-5 background galaxies inside the half-mass radius. Since the core density of NGC 288 is very low, the faint X-ray sources of NGC 288 found in the Chandra and HST observations is higher than the prediction on the basis of the collision frequency. We suggest that the CVs and chromospherically active binaries are primordial in origin, in agreement with theoretical expectation.
Anderson Scott F.
Bassa Cees
Homer Lee
Kong Albert K. H.
Lewin Walter H. G.
No associations
LandOfFree
Chandra and Hubble Space Telescope Study of the Globular Cluster NGC 288 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 and Hubble Space Telescope Study of the Globular Cluster NGC 288, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chandra and Hubble Space Telescope Study of the Globular Cluster NGC 288 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-728747