Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-03-14
Astronomy and Astrophysics
Astrophysics
in press in the ApJ
Scientific paper
10.1086/588462
We have used a combination of ACS-HST high-resolution and wide-field SUBARU data in order to study the Blue Straggler Star (BSS) population over the entire extension of the remote Galactic globular cluster NGC 2419. The BSS population presented here is among the largest ever observed in any stellar system, with more than 230 BSS in the brightest portion of the sequence. The radial distribution of the selected BSS is essentially the same as that of the other cluster stars. In this sense the BSS radial distribution is similar to that of omega Centauri and unlike that of all Galactic globular clusters studied to date, which have highly centrally segregated distributions and, in most cases, a pronounced upturn in the external regions. As in the case of omega Centauri, this evidence indicates that NGC 2419 is not yet relaxed even in the central regions. This observational fact is in agreement with estimated half-mass relaxation time, which is of the order of the cluster age.
!
Bellazzini Michele
Dalessandro Emanuele
Ferraro Francesco R.
Lanzoni Barbara
No associations
LandOfFree
Another Non-segregated Blue Straggler Population in a Globular Cluster: the Case of NGC 2419 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 Another Non-segregated Blue Straggler Population in a Globular Cluster: the Case of NGC 2419, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Another Non-segregated Blue Straggler Population in a Globular Cluster: the Case of NGC 2419 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-246704