Dynamical Evolution in the Open Cluster NGC 6819

Details Dynamical Evolution in the Open Cluster NGC 6819 Dynamical Evolution in the Open Cluster NGC 6819

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jkas...35...87k&link_type=abstract

Journal of the Korean Astronomical Society, vol. 35, no. 2, pp. 87-95

Astronomy and Astrophysics

Astronomy

5

Open Clusters:Individual(Ngc6819), Luminosity Function, Mass Function

Scientific paper

We have conducted VI CCD photometry of the open cluster NGC 6819 in order to understand the effects of dynamical evolution in old open clusters. Our photometry covers 18' x 18' on the sky, centered on the cluster, which seems to cover the whole cluster field. Our photometry reaches down to V ≈ 20.5, which allows us to analyze the luminosity function and spatial distribution of stars brighter than MV ≈ 8.5. There is a clear evidence for mass segregation in NGC 6819, i.e., the giants and upper main-sequence stars are concentrated in the inner regions, whereas the lower main-sequence stars distribute almost uniformly throughout the cluster. The luminosity function of the main-sequence stars of NGC 6819 is almost flat. The flat luminosity function indicates that a large number of low mass stars has escaped from the cluster unless its initial mass function is much different from the Salpeter type (Φ(m) ∝ m-(1+x), x = 1.35).

Affiliated with

Also associated with

No associations

Rating

Dynamical Evolution in the Open Cluster NGC 6819 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 Dynamical Evolution in the Open Cluster NGC 6819, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical Evolution in the Open Cluster NGC 6819 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1213501