Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1051/0004-6361/201220285 |
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
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ISSN | 1432-0746 |
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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