New halo stars of the Galactic globular clusters M3 and M13 in the LAMOST DR1 Catalog
arXiv:1606.06430 · doi:10.3847/0004-637X/829/2/123
Abstract
M3 and M13 are Galactic globular clusters with previous reports of surrounding stellar halos. We present the results of a search for members and extratidal cluster halo stars within and outside of the tidal radius of these clusters in the LAMOST Data Release 1. We find seven candidate cluster members (inside the tidal radius) of both M3 and M13 respectively. In M3 we also identify eight candidate extratidal cluster halo stars at distances up to ~9.8 times the tidal radius, and in M13 we identify 12 candidate extratidal cluster halo stars at distances up to ~13.8 times the tidal radius. These results support previous indications that both M3 and M13 are surrounded by extended stellar halos, and we find that the GC destruction rates corresponding to the observed mass loss are generally significantly higher than theoretical studies predict.
21 pages, 10 figures. Accepted for publication in ApJ
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- Purveyors of fine halos. II. Chemodynamical association of halo stars with Milky Way globular clusters
- Searching for the extra-tidal stars of globular clusters using high-dimensional analysis and a core particle spray code