SDSS-IV MaNGA: Variation of the Stellar Initial Mass Function in Spiral and Early-type Galaxies
文献类型：期刊论文
| 作者 | Li,Hongyu5,6; Ge,Junqiang5; Mao,Shude5,7,8; Cappellari,Michele9; Long,R. J.5,8; Li,Ran5,10; Emsellem,Eric11,12; Dutton,Aaron A.13; Li,Cheng7,14; Bundy,Kevin1 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2017-03-29 |
| 卷号 | 838期号:2 |
| 关键词 | dark matter galaxies: evolution galaxies: formation galaxies: kinematics and dynamics galaxies: structure |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa662a |
| 英文摘要 | Abstract We perform Jeans anisotropic modeling (JAM) on elliptical and spiral galaxies from the MaNGA DR13 sample. By comparing the stellar mass-to-light ratios estimated from stellar population synthesis and from JAM, we find a?systematic variation of the initial mass function (IMF) similar to that?in the earlier results. Early-type galaxies (elliptical and lenticular) with lower velocity dispersions within one effective radius are consistent with a Chabrier-like IMF, while galaxies with higher velocity dispersions are consistent with a more bottom-heavy IMF such as the Salpeter IMF. Spiral galaxies have similar systematic IMF variations, but with slightly different slopes and larger scatters, due to the uncertainties caused by the?higher gas fractions and extinctions for these galaxies. Furthermore, we examine the effects of stellar mass-to-light ratio gradients on our JAM modeling, and we?find that the trends become?stronger after considering the gradients. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-838-2-AA662A |
| 出版者 | The American Astronomical Society |
| 源URL | [http://119.78.226.72/handle/331011/32137]  |
| 专题 | 中国科学院上海天文台 |
| 作者单位 | 1.Kavli IPMU (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan 2.McDonald Observatory, The University of Texas at Austin, 1 University Station, Austin, TX 78712, USA 3.Department of Physics and Astronomy, Universidad de La Serena, Cisternas 1200, La Serena, Chile 4.Institute of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX, UK 5.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China; hyli@nao.cas.cn 6.University of Chinese Academy of Sciences, Beijing 100049, China 7.Physics Department and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing 100084, China 8.Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Oxford Road, Manchester M13 9PL, UK 9.Sub-Department of Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK 10.Key laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China |
| 推荐引用方式 GB/T 7714 | Li,Hongyu,Ge,Junqiang,Mao,Shude,et al. SDSS-IV MaNGA: Variation of the Stellar Initial Mass Function in Spiral and Early-type Galaxies[J]. The Astrophysical Journal,2017,838(2). |
| APA | Li,Hongyu.,Ge,Junqiang.,Mao,Shude.,Cappellari,Michele.,Long,R. J..,...&Lopes,Alexandre Roman.(2017).SDSS-IV MaNGA: Variation of the Stellar Initial Mass Function in Spiral and Early-type Galaxies.The Astrophysical Journal,838(2). |
| MLA | Li,Hongyu,et al."SDSS-IV MaNGA: Variation of the Stellar Initial Mass Function in Spiral and Early-type Galaxies".The Astrophysical Journal 838.2(2017). |
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