Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. I. Survey Design, Follow-up Program, and Binary Frequency

Wako Aoki; Haining Li; Tadafumi Matsuno; Qianfan Xing; Yuqin Chen; Norbert Christlieb; Satoshi Honda; Miho N. Ishigaki; Jianrong Shi; Takuma Suda; Nozomu Tominaga; Hong Liang Yan; Jingkun Zhao; Gang Zhao

doi:10.3847/1538-4357/ac6515

Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. I. Survey Design, Follow-up Program, and Binary Frequency

Wako Aoki
, Haining Li
, Tadafumi Matsuno
, Qianfan Xing
, Yuqin Chen
, Norbert Christlieb
, Satoshi Honda
, Miho N. Ishigaki
, Jianrong Shi
, Takuma Suda
, Nozomu Tominaga
, Hong Liang Yan
, Jingkun Zhao
, Gang Zhao

Astronomy

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The chemical abundances of very metal-poor stars provide important constraints on the nucleosynthesis of the first generation of stars and early chemical evolution of the Galaxy. We have obtained high-resolution spectra with the Subaru Telescope for candidates of very metal-poor stars selected with a large survey of Galactic stars carried out with LAMOST. In this series of papers, we report on the elemental abundances of about 400 very metal-poor stars and discuss the kinematics of the sample obtained by combining the radial velocities measured in this study and recent astrometry obtained with Gaia. This paper provides an overview of our survey and follow-up program, and reports radial velocities for the whole sample. We identify seven double-lined spectroscopic binaries from our high-resolution spectra, for which radial velocities of the components are reported. We discuss the frequency of such relatively short-period binaries at very low metallicity.

Original language	English
Article number	146
Number of pages	11
Journal	Astrophysical Journal
Volume	931
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ac6515
Publication status	Published - 6-Jun-2022

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Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. I. Survey Design, Follow-up Program, and Binary FrequencyFinal publisher's version, 3.13 MBLicence: CC BY

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Aoki, W., Li, H., Matsuno, T., Xing, Q., Chen, Y., Christlieb, N., Honda, S., Ishigaki, M. N., Shi, J., Suda, T., Tominaga, N., Yan, H. L., Zhao, J., & Zhao, G. (2022). Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. I. Survey Design, Follow-up Program, and Binary Frequency. Astrophysical Journal, 931(2), Article 146. https://doi.org/10.3847/1538-4357/ac6515

@article{32a589f5327349f389442324304bc33a,

title = "Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. I. Survey Design, Follow-up Program, and Binary Frequency",

abstract = "The chemical abundances of very metal-poor stars provide important constraints on the nucleosynthesis of the first generation of stars and early chemical evolution of the Galaxy. We have obtained high-resolution spectra with the Subaru Telescope for candidates of very metal-poor stars selected with a large survey of Galactic stars carried out with LAMOST. In this series of papers, we report on the elemental abundances of about 400 very metal-poor stars and discuss the kinematics of the sample obtained by combining the radial velocities measured in this study and recent astrometry obtained with Gaia. This paper provides an overview of our survey and follow-up program, and reports radial velocities for the whole sample. We identify seven double-lined spectroscopic binaries from our high-resolution spectra, for which radial velocities of the components are reported. We discuss the frequency of such relatively short-period binaries at very low metallicity.",

author = "Wako Aoki and Haining Li and Tadafumi Matsuno and Qianfan Xing and Yuqin Chen and Norbert Christlieb and Satoshi Honda and Ishigaki, \{Miho N.\} and Jianrong Shi and Takuma Suda and Nozomu Tominaga and Yan, \{Hong Liang\} and Jingkun Zhao and Gang Zhao",

note = "Funding Information: This research is based on data collected using the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. We are honored by and grateful for the opportunity to observe the universe from Maunakea, which has cultural, historical, and natural significance in Hawaii. Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST) is a National Major Scientific Project built by the Chinese Academy of Sciences. Funding for the project has been provided by the National Development and Reform Commission. LAMOST is operated and managed by the National Astronomical Observatories, Chinese Academy of Sciences. This work has made use of data from the European Space Agency (ESA) mission Gaia ( https://www.cosmos.esa.int/gaia ), processed by the Gaia Data Processing and Analysis Consortium (DPAC) ( https://www.cosmos.esa.int/web/gaia/dpac/consortium ). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This work was supported by JSPS—CAS Joint Research Program. W.A. and T.S. were supported by JSPS KAKENHI grant Nos. 21H04499, 16H02168, 16K05287, and 15HP7004. M.N.I. was supported by JSPS JSPS KAKENHI grant Nos. 17K14249 and 20H05855. T.M. was supported by a Spinoza Grant from the Dutch Research Council (NWO). The Chinese team was supported by NSFC grant Nos. 11988101, 11973049, 11890694, 11625313, 11973048, 11927804, 12090044, 11833006, 12022304, 11973052, National Key R\&D Program of China No. 2019YFA0405502, the Strategic Priority Research Program of Chinese Academy of Sciences, grant No. XDB34020205, science research grants from the China Manned Space Project with No. CMSCSST-2021-B05, and the Youth Innovation Promotion Association of the CAS (id. Y202017, 2019060, 2020058). N.C. acknowledges funding by the Deutsche Forschungsgemeinschaft (DFG; German Research Foundation)—Project-ID 138713538—SFB 881 (“The Milky Way System,” subproject A04). Publisher Copyright: {\textcopyright} 2022. The Author(s). Published by the American Astronomical Society.",

year = "2022",

month = jun,

day = "6",

doi = "10.3847/1538-4357/ac6515",

language = "English",

volume = "931",

journal = "Astrophysical Journal",

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T1 - Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. I. Survey Design, Follow-up Program, and Binary Frequency

AU - Aoki, Wako

AU - Li, Haining

AU - Matsuno, Tadafumi

AU - Xing, Qianfan

AU - Chen, Yuqin

AU - Christlieb, Norbert

AU - Honda, Satoshi

AU - Ishigaki, Miho N.

AU - Shi, Jianrong

AU - Suda, Takuma

AU - Tominaga, Nozomu

AU - Yan, Hong Liang

AU - Zhao, Jingkun

AU - Zhao, Gang

N1 - Funding Information: This research is based on data collected using the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. We are honored by and grateful for the opportunity to observe the universe from Maunakea, which has cultural, historical, and natural significance in Hawaii. Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST) is a National Major Scientific Project built by the Chinese Academy of Sciences. Funding for the project has been provided by the National Development and Reform Commission. LAMOST is operated and managed by the National Astronomical Observatories, Chinese Academy of Sciences. This work has made use of data from the European Space Agency (ESA) mission Gaia ( https://www.cosmos.esa.int/gaia ), processed by the Gaia Data Processing and Analysis Consortium (DPAC) ( https://www.cosmos.esa.int/web/gaia/dpac/consortium ). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This work was supported by JSPS—CAS Joint Research Program. W.A. and T.S. were supported by JSPS KAKENHI grant Nos. 21H04499, 16H02168, 16K05287, and 15HP7004. M.N.I. was supported by JSPS JSPS KAKENHI grant Nos. 17K14249 and 20H05855. T.M. was supported by a Spinoza Grant from the Dutch Research Council (NWO). The Chinese team was supported by NSFC grant Nos. 11988101, 11973049, 11890694, 11625313, 11973048, 11927804, 12090044, 11833006, 12022304, 11973052, National Key R&D Program of China No. 2019YFA0405502, the Strategic Priority Research Program of Chinese Academy of Sciences, grant No. XDB34020205, science research grants from the China Manned Space Project with No. CMSCSST-2021-B05, and the Youth Innovation Promotion Association of the CAS (id. Y202017, 2019060, 2020058). N.C. acknowledges funding by the Deutsche Forschungsgemeinschaft (DFG; German Research Foundation)—Project-ID 138713538—SFB 881 (“The Milky Way System,” subproject A04). Publisher Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

PY - 2022/6/6

Y1 - 2022/6/6

N2 - The chemical abundances of very metal-poor stars provide important constraints on the nucleosynthesis of the first generation of stars and early chemical evolution of the Galaxy. We have obtained high-resolution spectra with the Subaru Telescope for candidates of very metal-poor stars selected with a large survey of Galactic stars carried out with LAMOST. In this series of papers, we report on the elemental abundances of about 400 very metal-poor stars and discuss the kinematics of the sample obtained by combining the radial velocities measured in this study and recent astrometry obtained with Gaia. This paper provides an overview of our survey and follow-up program, and reports radial velocities for the whole sample. We identify seven double-lined spectroscopic binaries from our high-resolution spectra, for which radial velocities of the components are reported. We discuss the frequency of such relatively short-period binaries at very low metallicity.

AB - The chemical abundances of very metal-poor stars provide important constraints on the nucleosynthesis of the first generation of stars and early chemical evolution of the Galaxy. We have obtained high-resolution spectra with the Subaru Telescope for candidates of very metal-poor stars selected with a large survey of Galactic stars carried out with LAMOST. In this series of papers, we report on the elemental abundances of about 400 very metal-poor stars and discuss the kinematics of the sample obtained by combining the radial velocities measured in this study and recent astrometry obtained with Gaia. This paper provides an overview of our survey and follow-up program, and reports radial velocities for the whole sample. We identify seven double-lined spectroscopic binaries from our high-resolution spectra, for which radial velocities of the components are reported. We discuss the frequency of such relatively short-period binaries at very low metallicity.

UR - https://www.scopus.com/pages/publications/85132343218

U2 - 10.3847/1538-4357/ac6515

DO - 10.3847/1538-4357/ac6515

M3 - Article

AN - SCOPUS:85132343218

SN - 0004-637X

VL - 931

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 146

ER -

Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. I. Survey Design, Follow-up Program, and Binary Frequency

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Very metal-poor stars with LAMOST & Subaru. I.