Deep Hubble Space Telescope observations of blue star clusters in NGC 3597

被引:17
作者
Carlson, MN
Holtzman, JA
Grillmair, CJ
Mould, JR
Griffiths, RE
Ballester, GE
Burrows, CJ
Clarke, JT
Crisp, D
Evans, RW
Gallagher, JS
Hester, JJ
Hoessel, JG
Scowen, PA
Stapelfeldt, KR
Trauger, JT
Watson, AM
Westphal, JA
机构
[1] New Mexico State Univ, Dept Astron, Dept 4500, Las Cruces, NM 88003 USA
[2] CALTECH, SIRTF Sci Ctr, Pasadena, CA 91125 USA
[3] Australian Natl Univ, Mt Stromlo & Siding Spring Observ, Weston, ACT 2611, Australia
[4] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA
[5] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA
[6] Space Telescope Sci Inst, Baltimore, MD 21218 USA
[7] ESA, Dept Space Sci, Div Astrophys, F-75738 Paris 15, France
[8] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[9] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA
[10] Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA
[11] Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58090, Michoacan, Mexico
[12] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA
关键词
galaxies : star clusters;
D O I
10.1086/300819
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have analyzed HST/WFPC2 images of NGC 3597 and find similar to 700 compact objects surrounding the galaxy with an average (B-R)(o) similar to 0.6. We propose that the majority of these objects are young globular clusters. They have a spread in colors that is consistent with that expected for a population of young clusters with a common age and spread induced by photometric errors and reddening within NGC 3597. If these objects were similar to the Galactic globular cluster system seen at a younger age, we would predict a turnover in the luminosity function at B similar to 23. However, we find that the luminosity function for the clusters is increasing to the limits of our photometry (B similar to 27).
引用
收藏
页码:1700 / 1707
页数:8
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ZEPF SE, 1999, UNPUB AJ