The Galactic Anticenter Stellar Structure and Outer Old Open Cluster Origins

Details The Galactic Anticenter Stellar Structure and Outer Old Open Cluster Origins The Galactic Anticenter Stellar Structure and Outer Old Open Cluster Origins

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20517501f&link_type=abstract

American Astronomical Society Meeting 205, #175.01; Bulletin of the American Astronomical Society, Vol. 37, p.379

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Scientific paper

The Galactic Anticenter Stellar Structure (GASS), also known as the Moneceros ``Ring" or the Canis Major galaxy, has been identified by the presence of observed excess surface densities of field stars in several large area sky surveys, along with an unusual, string-like grouping of star clusters. Some members of the cluster grouping have radial velocities consistent with the GASS velocity-longitude trend defined from M giant observations. We provide radial velocity and spectroscopic metallicity measurements for a number of clusters that have been suggested to be associated with the GASS. We also derive an improved age-metallicity relation (AMR) for all of the clusters shown to be consistent with GASS. We find that the AMR is consistant with that of the other dwarf galaxy cluster systems.

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