An extended star cluster at the outer edge of the spiral galaxy M33

Details An extended star cluster at the outer edge of the spiral galaxy M33 An extended star cluster at the outer edge of the spiral galaxy M33

2008-02-04

arxiv.org/abs/0802.0501v1

Astronomy and Astrophysics

Astrophysics

20 pages, 6 figures, 2 tables, accepted for publication in AJ

Scientific paper

10.1088/0004-6256/135/4/1482

We report a discovery of an extended globular-like star cluster, M33-EC1, at the outer edge of the spiral galaxy M33. The distance to the cluster is 890 kpc, and it lies at a 12.5 kpc projected distance from the center of M33. Old age (>~7 Gyr) and low metallicity ([M/H] <~ -1.4) are estimated on the basis of isochrone fits. Color-magnitude diagrams of stars, located in the cluster's area, photometric and structural parameters of the cluster are presented. Cluster's luminosity (M_V = -6.6) and half-light radius (r_h = 20.3 pc) are comparable to those of the extended globular clusters, discovered in more luminous Local Group galaxies, the Milky Way and M31. Extended globular clusters are suspected to be remnants of accreted dwarf galaxies, and the finding of such a cluster in the late-type dwarf spiral galaxy M33 would imply a complex merging history in the past.

Affiliated with

Also associated with

No associations

Rating

An extended star cluster at the outer edge of the spiral galaxy M33 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 An extended star cluster at the outer edge of the spiral galaxy M33, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An extended star cluster at the outer edge of the spiral galaxy M33 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-45028