The Globular Cluster M54 and the Star Formation History of the Sagittarius Dwarf Galaxy

Details The Globular Cluster M54 and the Star Formation History of the Sagittarius Dwarf Galaxy The Globular Cluster M54 and the Star Formation History of the Sagittarius Dwarf Galaxy

1997-06-16

arxiv.org/abs/astro-ph/9706168v1

Astronomy and Astrophysics

Astrophysics

11 pages, AASTeX, 3 postscript figures, accepted for publication in ApJ Letters

Scientific paper

10.1086/310848

We present a deep color-magnitude diagram in the VI passbands of the globular cluster M54, a member of the Sagittarius dwarf galaxy. The data extend below the cluster's main sequence turn-off, allowing us to estimate the cluster's age. We find that M54 is 0.5--1.5 gigayears older than the Galactic globulars M68 and M5. In absolute terms, the age is comparable to the published age estimates of the other member clusters Arp 2 and Terzan 8, but is significantly older than the member cluster Terzan 7. An age estimate of the Sagittarius field population relative to M54 suggests that M54 is \gtrsim 3 Gyr older than the field. We discuss briefly the star formation history of the Sagittarius dwarf galaxy.

Affiliated with

Also associated with

No associations

Rating

The Globular Cluster M54 and the Star Formation History of the Sagittarius Dwarf 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 The Globular Cluster M54 and the Star Formation History of the Sagittarius Dwarf Galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Globular Cluster M54 and the Star Formation History of the Sagittarius Dwarf Galaxy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-277640