Arid
DOI10.1051/0004-6361/201220285
How does star formation proceed in the circumnuclear starburst ring of NGC 6951?
van der Laan, T. P. R.1; Schinnerer, E.1; Emsellem, E.2; Hunt, L. K.3; McDermid, R. M.4; Liu, G.5
通讯作者van der Laan, T. P. R.
来源期刊ASTRONOMY & ASTROPHYSICS
ISSN1432-0746
出版年2013
卷号551
英文摘要

Gas inflowing along stellar bars is often stalled at the location of circumnuclear rings, which form an effective reservoir for massive star formation and thus shape the central regions of galaxies. However, how exactly star formation proceeds within these circumnuclear starburst rings is the subject of debate. Two main scenarios for this process have been put forward. In the first, the onset of star formation is regulated by the total amount of gas present in the ring with star forming starting, once a mass threshold has been reached, in "random" positions within the ring like "popcorn". In the second, star formation primarily takes place near the locations where the gas enters the ring. This scenario has been dubbed "pearls-on-a-string". Here we combine new optical IFU data covering the full stellar bar with existing multiwavelength data to study the 580 pc radius circumnuclear starburst ring in detail in the nearby spiral galaxy NGC 6951. Using Hubble Space Telescope (HST) archival data together with SAURON and OASIS IFU data, we derive the ages and stellar masses of star clusters, as well as the total stellar content of the central region. Adding information on the molecular gas distribution, stellar and gaseous dynamics, and extinction, we find that the circumnuclear ring in NGC 6951 is similar to 1-1.5 Gyr old and has been forming stars for most of that time. We see evidence for preferred sites of star formation within the ring, consistent with the "pearls-on-a-string" scenario, when focusing on the youngest stellar populations. The ring’s longevity means that this signature is washed out when older stellar populations are included in the analysis.


英文关键词galaxies: individual: NGC 6951 galaxies: ISM galaxies: stellar content
类型Article
语种英语
国家Germany ; Italy ; USA
收录类别SCI-E
WOS记录号WOS:000316460600081
WOS关键词INTEGRAL-FIELD SPECTROSCOPY ; SAURON PROJECT ; NUCLEAR RINGS ; MOLECULAR GAS ; LINE KINEMATICS ; HOST GALAXIES ; BLACK-HOLE ; STELLAR ; SEYFERT ; LIBRARY
WOS类目Astronomy & Astrophysics
WOS研究方向Astronomy & Astrophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/175954
作者单位1.Max Planck Inst Astron, D-69117 Heidelberg, Germany;
2.European So Observ, D-85748 Garching, Germany;
3.INAF Osservatorio Astrofis Arcetri, I-50125 Florence, Italy;
4.Northern Operat Ctr, Gemini Observ, Hilo, HI 96720 USA;
5.Johns Hopkins Univ, Ctr Astrophys Sci, Baltimore, MD 21218 USA
推荐引用方式
GB/T 7714
van der Laan, T. P. R.,Schinnerer, E.,Emsellem, E.,et al. How does star formation proceed in the circumnuclear starburst ring of NGC 6951?[J],2013,551.
APA van der Laan, T. P. R.,Schinnerer, E.,Emsellem, E.,Hunt, L. K.,McDermid, R. M.,&Liu, G..(2013).How does star formation proceed in the circumnuclear starburst ring of NGC 6951?.ASTRONOMY & ASTROPHYSICS,551.
MLA van der Laan, T. P. R.,et al."How does star formation proceed in the circumnuclear starburst ring of NGC 6951?".ASTRONOMY & ASTROPHYSICS 551(2013).
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