The Nature of the Double Nuclei in the Barred S0 Galaxy IC 676
The Nature of the Double Nuclei in the Barred S0 Galaxy IC 676
复制标题
禁止 S0 星系中双核的性质 IC 676
DOI：
10.3847/1538-4357/ab6f02
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发表时间：
2020-01
影响因子：
4.9
通讯作者：
Wu Hong
中科院分区：
文献类型：
--
作者：
Zhou Zhimin;Ma Jun;Zhou Xu;Wu Hong
The lenticular galaxy IC 676 is a barred galaxy with double nuclei and active star formation in the central region. In this work we present the long-slit spectroscopy and archival multiwavelength images to investigate the nature and origin of the double nuclei in IC 676. Through photometric 1D brightness profiles and 2D image decomposition, we show that this galaxy consists of a stellar bar with the length of ∼2.5 kpc and two Sérsic disks both of which with Sérsic index n ∼ 1.3. There is probably little or no bulge component assembled in IC 676. The luminosities of the double nuclei are primarily dominated by young stellar populations within the ages of 1–10 Myr. The northern nucleus has stronger star formation activity than the southern one. The surface densities of the star formation rate in the double nuclei are similar to those in starburst galaxies or the circumnuclear star-forming regions in spiral galaxies. Each of the double nuclei in IC 676 likely consists of young massive star clusters, which can be resolved as bright knots in the Hubble Space Telescope high-resolution image. Our results suggest that IC 676 likely has a complex formation and evolutionary history. The secular processes driven by the stellar bar and external accretion may dominate the formation and evolution of its double nuclei. This indicates that the secular evolution involving the internal and external drivers may have an important contribution for the evolution of lenticular galaxies.
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影响因子：
4.8
作者：
R. Grijs;P. Anders;E. Zackrisson;Goran Ostlin Kiaa;Peking University;China.;Kyung Hee University
通讯作者：
R. Grijs;P. Anders;E. Zackrisson;Goran Ostlin Kiaa;Peking University;China.;Kyung Hee University
DOI：
10.1088/0004-6256/149/5/170
发表时间：
2015-01
期刊：
The Astronomical Journal
影响因子：
--
作者：
Daniel J. Carson;A. Barth;A. Seth;M. D. Brok;M. Cappellari;J. Greene;L. Ho;Nadine Neumayer University of Californi
通讯作者：
Daniel J. Carson;A. Barth;A. Seth;M. D. Brok;M. Cappellari;J. Greene;L. Ho;Nadine Neumayer University of Californi
影响因子：
4.8
作者：
G. Lansbury;J. Lucey;Russell J. Smith
通讯作者：
G. Lansbury;J. Lucey;Russell J. Smith
DOI：
10.1111/j.1365-2966.2007.12299.x
发表时间：
2007-02
影响因子：
4.8
作者：
E. Laurikainen;H. Salo;R. Buta;J. Knapen;J. Knapen
通讯作者：
E. Laurikainen;H. Salo;R. Buta;J. Knapen;J. Knapen
ATLAS3D 项目 - XVIII。
影响因子：
4.8
作者：
Alatalo K
通讯作者：
Alatalo K