LICK INDICES AND SPECTRAL ENERGY DISTRIBUTION ANALYSIS BASED ON AN M31 STAR CLUSTER SAMPLE: COMPARISONS OF METHODS AND MODELS
文献类型：期刊论文
| 作者 | Fan, Zhou1 ; de Grijs, Richard2,3,4; Chen, Bingqiu3; Jiang, Linhua2; Bian, Fuyan5; Li, Zhongmu6; Fan,Zhou
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2016-12-01 |
| 卷号 | 152期号:6 |
| 关键词 | galaxies: individual (M31) galaxies: star clusters: general globular clusters: general |
| 英文摘要 | Application of fitting techniques to obtain physical parameters-such as ages, metallicities, and a-element to iron ratios-of stellar populations is an important approach to understanding the nature of both galaxies and globular clusters (GCs). In fact, fitting methods based on different underlying models may yield different results and with varying precision. In this paper, we have selected 22 confirmed M31 GCs for which we do not have access to previously known spectroscopic metallicities. Most are located at approximately one degree (in projection) from the galactic center. We performed spectroscopic observations with the 6.5 m MMT telescope, equipped with its Red Channel Spectrograph. Lick/IDS absorption-line indices, radial velocities, ages, and metallicities were derived based on the EZ_Ages stellar population parameter calculator. We also applied full spectral fitting with the ULYSS code to constrain the parameters of our sample star clusters. In addition, we performed chi(2)(min) fitting of the clusters' Lick/IDS indices with different models, including the Bruzual & Charlot models (adopting Chabrier or Salpeter stellar initial mass functions and 1994 or 2000 Padova stellar evolutionary tracks), the GALEV, and the Thomas et al. models. For comparison, we collected their UVBRIJK photometry from the Revised Bologna Catalogue (v.5) to obtain and fit the GCs' spectral energy distributions (SEDs). Finally, we performed fits using a combination of Lick/IDS indices and SEDs. The latter results are more reliable and the associated error bars become significantly smaller than those resulting from either our Lick/IDS indices-only or our SED-only fits. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STELLAR POPULATION-MODELS ; ELEMENT ABUNDANCE RATIOS ; EARLY-TYPE GALAXIES ; 2.16 M TELESCOPE ; GLOBULAR-CLUSTERS ; EVOLUTIONARY SYNTHESIS ; UBVRI PHOTOMETRY ; LINE INDEXES ; AGE ; SYSTEM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000390337900001 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6820]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, 20A Datun Rd, Beijing 100012, Peoples R China 2.Peking Univ, Kavli Inst Astron & Astrophys, 5 Yi He Yuan Lu, Beijing 100871, Peoples R China 3.Peking Univ, Dept Astron, 5 Yi He Yuan Lu, Beijing 100871, Peoples R China 4.Int Space Sci Inst Beijing, 1 Nanertiao, Beijing 100190, Peoples R China 5.Mt Stromlo & Siding Spring Observ, Res Sch Astron & Astrophys, Cotter Rd, Weston, ACT 2611, Australia 6.Dali Univ, Inst Astron & Hist Sci & Technol, Dali 671003, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Zhou,de Grijs, Richard,Chen, Bingqiu,et al. LICK INDICES AND SPECTRAL ENERGY DISTRIBUTION ANALYSIS BASED ON AN M31 STAR CLUSTER SAMPLE: COMPARISONS OF METHODS AND MODELS[J]. ASTRONOMICAL JOURNAL,2016,152(6). |
| APA | Fan, Zhou.,de Grijs, Richard.,Chen, Bingqiu.,Jiang, Linhua.,Bian, Fuyan.,...&Fan,Zhou.(2016).LICK INDICES AND SPECTRAL ENERGY DISTRIBUTION ANALYSIS BASED ON AN M31 STAR CLUSTER SAMPLE: COMPARISONS OF METHODS AND MODELS.ASTRONOMICAL JOURNAL,152(6). |
| MLA | Fan, Zhou,et al."LICK INDICES AND SPECTRAL ENERGY DISTRIBUTION ANALYSIS BASED ON AN M31 STAR CLUSTER SAMPLE: COMPARISONS OF METHODS AND MODELS".ASTRONOMICAL JOURNAL 152.6(2016). |
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来源：国家天文台
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