THE ACS SURVEY OF GALACTIC GLOBULAR CLUSTERS. VI. NGC 6366: A HEAVILY STRIPPED GALACTIC GLOBULAR CLUSTER

被引：22

作者：

Paust, Nathaniel E. Q. ^{[1
]}

Aparicio, Antonio ^{[2
,3
]}

Piotto, Giampaolo ^{[4
]}

Reid, I. Neill ^{[1
]}

Anderson, Jay ^{[1
]}

Sarajedini, Ata ^{[5
]}

Bedin, Luigi R. ^{[1
]}

Chaboyer, Brian ^{[6
]}

Dotter, Aaron ^{[6
]}

Hempel, Maren ^{[5
]}

Majewski, Steven ^{[7
]}

Marin-Franch, A. ^{[8
]}

Milone, Antonino ^{[4
]}

Rosenberg, Alfred ^{[8
]}

Siegel, Michael ^{[9
]}

机构：

[1] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[2] Univ La Laguna, Dept Astrophys, E-38200 San Cristobal la Laguna, Spain

[3] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain

[4] Univ Padua, Dipartimento Astron, I-35122 Padua, Italy

[5] Univ Florida, Dept Astron, Gainesville, FL 32611 USA

[6] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA

[7] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA

[8] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain

[9] Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA

来源：

ASTRONOMICAL JOURNAL | 2009年 / 137卷 / 01期

关键词：

galaxies: luminosity function; mass function; globular clusters: general; globular clusters: individual (NGC 6366); COLOR-MAGNITUDE DIAGRAM; LOWER MAIN-SEQUENCE; LUMINOSITY FUNCTION; MASS FUNCTION; STELLAR POPULATION; ADVANCED CAMERA; STARS; CATALOG; SYSTEM; ISOCHRONES;

D O I：

10.1088/0004-6256/137/1/246

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 similar to 9, or masses of similar to 0.3 M-circle dot. 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-circle dot. We briefly discuss this interesting anomaly within the context of tidal stripping.

引用

页码：246 / 256

页数：11

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