GAS SURFACE DENSITY, STAR FORMATION RATE SURFACE DENSITY, AND THE MAXIMUM MASS OF YOUNG STAR CLUSTERS IN A DISK GALAXY. I. THE FLOCCULENT GALAXY M 33

被引：11
|
作者：
Gonzalez-Lopezlira, Rosa A. [1 ]
Pflamm-Altenburg, Jan [1 ]
Kroupa, Pavel [1 ]
机构：
[1] Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany
来源：
ASTROPHYSICAL JOURNAL | 2012年 / 761卷 / 02期
关键词：
galaxies: ISM; galaxies: spiral; galaxies: star clusters: individual (M 33; NGC; 598); stars: formation; DIFFUSE IONIZED-GAS; H-ALPHA; STELLAR POPULATIONS; MOLECULAR CLOUDS; NEARBY GALAXIES; SPIRAL GALAXIES; M33; ULTRAVIOLET; STARBURST99; PHOTOMETRY;
D O I：
10.1088/0004-637X/761/2/124
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We analyze the relationship between maximum cluster mass M-max and surface densities of total gas (Sigma(gas)), molecular gas (Sigma(H2)), and star formation rate (Sigma(SFR)) in the flocculent galaxy M 33, using published gas data and a catalog of more than 600 young star clusters in its disk. By comparing the radial distributions of gas and most massive cluster masses, we find that M-max alpha Sigma(4.7 +/- 0.4)(gas), M-max alpha Sigma(1.3 +/- 0.1)(H2), and M-max alpha Sigma(1.0 +/- 0.1)(SFR). We rule out that these correlations result from the size of the sample; hence, the change of the maximum cluster mass must be due to physical causes.
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页数：6
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