New halo stars of the Galactic globular clusters M3 and M13 in the LAMOST DR1 Catalog

Colin A. Navin; Sarah L. Martell; Daniel B. Zucker

doi:10.3847/0004-637X/829/2/123

New halo stars of the Galactic globular clusters M3 and M13 in the LAMOST DR1 Catalog

Colin A. Navin, Sarah L. Martell, Daniel B. Zucker

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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.

Original language	English
Article number	123
Pages (from-to)	1-14
Number of pages	14
Journal	Astrophysical Journal
Volume	829
Issue number	2
DOIs	https://doi.org/10.3847/0004-637X/829/2/123
Publication status	Published - 1 Oct 2016

Bibliographical note

Copyright 2016 The American Astronomical Society. First published in the Astrophysical Journal, 829(2), 123, 2016. The original publication is available at https://doi.org/10.3847/0004-637X/829/2/123, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

globular clusters: general
globular clusters: individual (M3 NGC 5272, M13 NGC 6205)
stars: kinematics and dynamics
techniques: radial velocities
techniques: spectroscopic

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Navin, C. A., Martell, S. L., & Zucker, D. B. (2016). New halo stars of the Galactic globular clusters M3 and M13 in the LAMOST DR1 Catalog. Astrophysical Journal, 829(2), 1-14. [123]. https://doi.org/10.3847/0004-637X/829/2/123

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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.",

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