The acs survey of galactic globular clusters. VI. NGC 6366: A heavily stripped galactic globular cluster

Nathaniel E.Q. Paust, Antonio Aparicio, Giampaolo Piotto, I. Neill Reid, Jay Anderson, Ata Sarajedini, Luigi R. Bedin, Brian Chaboyer, Aaron Dotter, Maren Hempel, Steven Majewski, A. Marín-Franch, Antonino Milone, Alfred Rosenberg, Michael Siegel

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

We have used observations obtained as part of the Hubble Space Telescope/ACS Survey of Galactic globular clusters (GCs) to construct a color-magnitude diagram for the bulge cluster, NGC 6366. The luminosity function derived from those data extends to M F606W 9, or masses of 0.3 M. Unlike most GCs, the mass function peaks near the main-sequence turnoff with significantly fewer low-mass stars even after correction for completeness and mass segregation. Using a multimass King model, we extrapolate the global cluster behavior and find the global mass function to be poorly matched by a power law, with a particular deficit of stars with masses between 0.5 and 0.7 M. We briefly discuss this interesting anomaly within the context of tidal stripping.

Original languageEnglish (US)
Pages (from-to)246-256
Number of pages11
JournalAstronomical Journal
Volume137
Issue number1
DOIs
StatePublished - Jun 3 2009

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Paust, N. E. Q., Aparicio, A., Piotto, G., Reid, I. N., Anderson, J., Sarajedini, A., Bedin, L. R., Chaboyer, B., Dotter, A., Hempel, M., Majewski, S., Marín-Franch, A., Milone, A., Rosenberg, A., & Siegel, M. (2009). The acs survey of galactic globular clusters. VI. NGC 6366: A heavily stripped galactic globular cluster. Astronomical Journal, 137(1), 246-256. https://doi.org/10.1088/0004-6256/137/1/246