Dynamical mass estimates of young massive clusters in NGC1140 and M83

被引：2

作者：

Moll, Sarah L. ^{[1
]}

de Grijs, Richard ^{[1
,2
]}

Mengel, Sabine ^{[3
]}

Smith, Linda J. ^{[4
,5
,6
]}

Crowther, Paul A. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[2] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

[3] European So Observ, D-85748 Garching, Germany

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

[5] European Space Agcy, Baltimore, MD 21218 USA

[6] UCL, Dept Phys & Astron, London WC1E 6BT, England

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2009年 / 324卷 / 2-4期

关键词：

Galaxies: individual: NGC1140; Galaxies: starburst; Galaxies: star clusters; Stars: Wolf-Rayet; STAR-CLUSTERS; WOLF-RAYET; STARBURST; MODELS; POPULATION; GALAXIES; SPECTROSCOPY; REGIONS;

D O I：

10.1007/s10509-009-0124-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present virial mass estimates of young massive clusters (YMCs) in the starburst galaxies NGC1140 and M83, determined from high spectral resolution VLT echelle spectroscopy and high spatial resolution Hubble Space Telescope imaging. The survivability of such clusters is important in testing the scenario that YMCs are potentially proto-globular clusters. As young clusters, they lie in the domain in which dynamical masses appear to overestimate true cluster masses, most likely due to the clusters not being virialised. We find that the dynamical mass of NGC1140-1 is approximately ten times greater than its photometric mass. We propose that the most likely explanation for this disparity is the crowded environment of NGC1140-1, rather than this being solely due to a lack of virial equilibrium.

引用

页码：177 / 182

页数：6

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