Label Transfer from APOGEE to LAMOST: Precise Stellar Parameters for 450,000 LAMOST Giants
文献类型：期刊论文
| 作者 | Ho, Anna Y. Q.1,2; Ness, Melissa K.2; Hogg, David W.2,3,4,5; Rix, Hans-Walter2; Liu, Chao6 ; Yang, Fan6; Zhang, Yong7; Hou, Yonghui7; Wang, Yuefei7; Yang,Fan
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2017-02-10 |
| 卷号 | 836期号:1 |
| 关键词 | catalogs methods: data analysis methods: statistical stars: abundances stars: fundamental parameters techniques: spectroscopic |
| 英文摘要 | In this era of large-scale spectroscopic stellar surveys, measurements of stellar attributes ("labels," i.e., parameters and abundances) must be made precise and consistent across surveys. Here, we demonstrate that this can be achieved by a data-driven approach to spectral modeling. With The. Cannon, we transfer information from the APOGEE survey to determine precise T-eff, log g, [Fe/H], and [alpha M] from the spectra of 450,000 LAMOST giants. The. Cannon fits a predictive model for LAMOST spectra using 9952 stars observed in common between the two surveys, taking five labels from APOGEE DR12 as ground truth Teff, log g, [ Fe/H], [alpha M], and K-band extinction A(k). The model is then used to infer Teff, log g, [Fe/H], and [alpha M] for 454,180 giants, 20% of the LAMOST DR2 stellar sample. These are the first [alpha M] values for the full set of LAMOST giants, and the largest catalog of [alpha M] for giant stars to date. Furthermore, these labels are by construction on the APOGEE label scale; for spectra with S/N. > 50, cross-validation of the model yields typical uncertainties of 70 K in Teff, 0.1 in log g, 0.1 in [Fe/H], and 0.04 in [alpha M], values comparable to the broadly stated, conservative APOGEE DR12 uncertainties. Thus, by using "label transfer" to tie low-resolution (LAMOST R approximate to 1800) spectra to the label scale of a much higher-resolution (APOGEE R approximate to 22,500) survey, we substantially reduce the inconsistencies between labels measured by the individual survey pipelines. This demonstrates that label transfer with The. Cannon can successfully bring different surveys onto the same physical scale. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIFFUSE INTERSTELLAR BANDS ; DIGITAL SKY SURVEY ; ATMOSPHERIC PARAMETERS ; SDSS-III ; MILKY-WAY ; STARS ; IDENTIFICATION ; SPECTRA ; TELESCOPE ; DISTANCE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000397298700004 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8246]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.CALTECH, Cahill Ctr Astrophys, MC 249-17,1200 E Calif Blvd, Pasadena, CA 91125 USA 2.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 3.Simons Ctr Data Anal, 160 Fifth Ave,7th Floor, New York, NY 10010 USA 4.NYU, Dept Phys, Ctr Cosmol & Particle Phys, 4 Washington Pl,Room 424, New York, NY 10003 USA 5.NYU, Ctr Data Sci, 726 Broadway,7th Floor, New York, NY 10003 USA 6.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Datun Rd 20A, Beijing 100012, Peoples R China 7.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Natl Astron Observ, Nanjing 210042, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ho, Anna Y. Q.,Ness, Melissa K.,Hogg, David W.,et al. Label Transfer from APOGEE to LAMOST: Precise Stellar Parameters for 450,000 LAMOST Giants[J]. ASTROPHYSICAL JOURNAL,2017,836(1). |
| APA | Ho, Anna Y. Q..,Ness, Melissa K..,Hogg, David W..,Rix, Hans-Walter.,Liu, Chao.,...&Liu,Chao.(2017).Label Transfer from APOGEE to LAMOST: Precise Stellar Parameters for 450,000 LAMOST Giants.ASTROPHYSICAL JOURNAL,836(1). |
| MLA | Ho, Anna Y. Q.,et al."Label Transfer from APOGEE to LAMOST: Precise Stellar Parameters for 450,000 LAMOST Giants".ASTROPHYSICAL JOURNAL 836.1(2017). |
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来源：国家天文台
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