Globular clusters in the outer halo of M 31
文献类型：期刊论文
| 作者 | Wang, Song3; Ma, Jun2,3; Liu, Jifeng1,2,3 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2019-03-06 |
| 卷号 | 623页码:14 |
| 关键词 | galaxies: individual: M 31 globular clusters: general galaxies: stellar content |
| ISSN号 | 1432-0746 |
| DOI | 10.1051/0004-6361/201834748 |
| 英文摘要 | In this paper, we present photometry of 53 globular clusters (GCs) in the M 31 outer halo, including the GALEX far-ultraviolet (FUV) and near-ultraviolet (NUV), SDSS ugriz, 15 intermediate-band filters of BATC, and 2MASS JHK(s) bands. By comparing the multicolour photometry with stellar population synthesis models, we determine the metallicities, ages, and masses for these GCs, aiming to probe the merging/accretion history of M 31. We find no clear trend of metallicity and mass with the de-projected radius. The halo GCs younger than similar to 8 Gyr are mostly located at the de-projected radii around 100 kpc, but this may be due to a selection effect. We also find that the halo GCs have consistent metallicities with their spatially associated substructures, which provides further evidence of the physical association between them. Both the disc and halo GCs in M 31 show a bimodal luminosity distribution. However, we should emphasise that there are more faint halo GCs which are not seen in the disc. The bimodal luminosity function of the halo GCs may reflect a different origin or evolution environment in their original hosts. The M 31 halo GCs include one intermediate metallicity group (-1.5 < [Fe/H] < -0.4) and one metal-poor group ([Fe/H] < -1.5), while the disc GCs have one metalrich group more. There are considerable differences between the halo GCs in M 31 and the Milky Way (MW). The total number of GCs in M 31 is approximately three times greater than in the MW, however M 31 has about six times more halo GCs than the MW. Compared to the halo GCs of M 31, those of the MW are mostly metal-poor. Both the numerous halo GCs and the higher-metallicity component are suggestive of an active merger history of M 31. |
| WOS关键词 | SPECTRAL ENERGY-DISTRIBUTIONS ; BAND SURFACE PHOTOMETRY ; GALAXY FORMATION ; MILKY-WAY ; STRUCTURAL PARAMETERS ; STELLAR POPULATION ; ACCRETION ORIGIN ; ACS PHOTOMETRY ; MAYALL II=G1 ; CANIS MAJOR |
| 资助项目 | Chinese National Natural Science Foundation[11603035] ; Chinese National Natural Science Foundation[11873053] ; Chinese National Natural Science Foundation[11433005] ; Chinese National Natural Science Foundation[11273028] ; Chinese National Natural Science Foundation[11333004] ; Chinese National Natural Science Foundation[2016YFA0400800] ; Chinese National Natural Science Foundation[11425313] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000460371200002 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/25330]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Wang, Song |
| 作者单位 | 1.Wuhan Univ, WHU NAOC Joint Ctr Astron, Wuhan 430072, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Song,Ma, Jun,Liu, Jifeng. Globular clusters in the outer halo of M 31[J]. ASTRONOMY & ASTROPHYSICS,2019,623:14. |
| APA | Wang, Song,Ma, Jun,&Liu, Jifeng.(2019).Globular clusters in the outer halo of M 31.ASTRONOMY & ASTROPHYSICS,623,14. |
| MLA | Wang, Song,et al."Globular clusters in the outer halo of M 31".ASTRONOMY & ASTROPHYSICS 623(2019):14. |
入库方式： OAI收割
来源：国家天文台
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