Tidal triggering of star formation in the Sloan digital sky survey

被引：0
|
作者：
Nikolic, B [1 ]
Cullen, H [1 ]
Alexander, P [1 ]
机构：
[1] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England
来源：
PROCEEDINGS OF THE DUSTY AND MOLECULAR UNIVERSE: A PRELUDE TO HERSCHEL AND ALMA | 2005年 / 577卷
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have investigated the connection between star formation and galaxy-galaxy interactions using a large (20K galaxies) sample drawn from the Sloan Digital Sky Survey. We find, using extinction and aperture corrected H alpha data, enhanced star formation in galaxies with close companions which we interpret as strong evidence of triggered star formation. Using a subsample of galaxies detected by IRAS we find that far-infrared and Ha derived star-formation rates show a very similar trend with companion separation. Finally, we find that galaxies with companions closer than about 50 kpc have on average significantly more centrally concentrated light profiles which we interpret as evidence for nuclear starbursts.
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页码：303 / 304
页数：2
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