An Unusual Old Open Cluster: Berkeley 20

Details An Unusual Old Open Cluster: Berkeley 20 An Unusual Old Open Cluster: Berkeley 20

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...18311006m&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #110.06; Bulletin of the American Astronomical Society, Vol. 25, p.1455

Astronomy and Astrophysics

Astronomy

Scientific paper

We present CCD VIc photometry for Berkeley 20, a heretofore unstudied old open cluster found over 2 kpc below the galactic plane. The data were gathered with both the KPNO 2.1m and the CTIO 0.9m during 1992 as part of an ongoing survey of old open clusters. Based on the best fits of VandenBerg's 1985 isochrones to the V,V-I CMD, we estimate an age of 6 to 8 Gyr, metallicity of [Fe/H] ~ -0.25 to -0.50 dex, (m-M)v of 14.8 to 15.1 and E(V-I) (~ 1.3E(B-V)) of 0.12 to 0.21 mag. It is one of the most distant clusters known at roughly 8 kpc from the Sun, and the current galactocentric distance champion at Rgc =~ 15.6 kpc. Its great distance below the plane poses difficult questions for any picture of disk formation and structure; Be 20 may also be related to the galactic warp.

Affiliated with

Also associated with

No associations

Rating

An Unusual Old Open Cluster: Berkeley 20 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 Unusual Old Open Cluster: Berkeley 20, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Unusual Old Open Cluster: Berkeley 20 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-781522