METALLICITY GRADIENTS AND GAS FLOWS IN GALAXY PAIRS

被引：211

作者：

Kewley, Lisa J. ^{[1
]}

Rupke, David ^{[1
]}

Zahid, H. Jabran ^{[1
]}

Geller, Margaret J. ^{[2
]}

Barton, Elizabeth J. ^{[3
]}

机构：

[1] Univ Hawaii, Inst Astron, Hilo, HI 96822 USA

[2] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA

[3] Univ Calif Irvine, Irvine, CA 92697 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2010年 / 721卷 / 01期

基金：

美国国家科学基金会;

关键词：

galaxies: abundances; galaxies: fundamental parameters; galaxies: interactions; galaxies: starburst; TRIGGERED STAR-FORMATION; GEMINI SPECTROSCOPIC SURVEY; EXTRAGALACTIC HII-REGIONS; CLOSE PAIRS; MOLECULAR GAS; H-II; ABUNDANCES; CLUSTERS; STARBURST; MERGER;

D O I：

10.1088/2041-8205/721/1/L48

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first systematic investigation into the metallicity gradients in galaxy close pairs. We determine the metallicity gradients for eight galaxies in close pairs using H II region metallicities obtained with high signal-to-noise multi-slit observations with the Keck LRIS Spectrograph. We show that the metallicity gradients in close pairs are significantly shallower than gradients in isolated spiral galaxies such as the Milky Way, M83, and M101. These observations provide the first solid evidence that metallicity gradients in interacting galaxies are systematically different from metallicity gradients in isolated spiral galaxies. Our results suggest that there is a strong relationship between metallicity gradients and the gas dynamics in galaxy interactions and mergers.

引用

页码：L48 / L52

页数：5

共 50 条

[1]

Alonso M. S., 2010, ASTRON ASTROPHYS, V514, P57

[2] FUELING STARBURST GALAXIES WITH GAS-RICH MERGERS [J].