The growth of the central region by acquisition of counterrotating gas in star-forming galaxies.
The growth of the central region by acquisition of counterrotating gas in star-forming galaxies.
复制标题
通过在恒星形成星系中获得反向旋转气体而导致中心区域的增长
DOI：
10.1038/ncomms13269
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发表时间：
2016-10-19
影响因子：
16.6
通讯作者：
Yan, Ren-Bin
中科院分区：
文献类型：
--
作者：
Chen, Yan-Mei;Shi, Yong;Tremonti, Christy A.;Bershady, Matt;Merrifield, Michael;Emsellem, Eric;Jin, Yi-Fei;Huang, Song;Fu, Hai;Wake, David A.;Bundy, Kevin;Stark, David;Lin, Lihwai;Argudo-Fernandez, Maria;Bergmann, Thaisa Storchi;Bizyaev, Dmitry;Brownstein, Joel;Bureau, Martin;Chisholm, John;Drory, Niv;Guo, Qi;Hao, Lei;Hu, Jian;Li, Cheng;Li, Ran;Roman Lopes, Alexandre;Pan, Kai-Ke;Riffel, Rogemar A.;Thomas, Daniel;Wang, Lan;Westfall, Kyle;Yan, Ren-Bin
Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, systematic studies of such phenomena in blue, star-forming galaxies are rare, leaving uncertain the role of external gas acquisition in driving evolution of blue galaxies. Here, based on new measurements with integral field spectroscopy of a large representative galaxy sample, we find an appreciable fraction of counter-rotators among blue galaxies (9 out of 489 galaxies). The central regions of blue counter-rotators show younger stellar populations and more intense, ongoing star formation than their outer parts, indicating ongoing growth of the central regions. The result offers observational evidence that the acquisition of external gas in blue galaxies is possible; the interaction with pre-existing gas funnels the gas into nuclear regions (<1 kpc) to form new stars.
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影响因子：
4.9
作者：
Dalcanton, Julianne J.
通讯作者：
Dalcanton, Julianne J.
影响因子：
4.9
作者：
GALLETTA, G
通讯作者：
GALLETTA, G
影响因子：
5.3
作者：
RUBIN, VC
通讯作者：
RUBIN, VC
影响因子：
4.9
作者：
Bundy, Kevin;Bershady, Matthew A.;Zhang, Kai
通讯作者：
Zhang, Kai
影响因子：
64.8
作者：
CIRI, R;BETTONI, D;GALLETTA, G
通讯作者：
GALLETTA, G