Double-lined Spectroscopic Binaries from the LAMOST Low-resolution Survey
We report on a data-driven spectral model that we have developed for the identification of double-lined spectroscopic binary stars (SB2s) in the Large Sky Area Multi-Object fiber Spectroscopic Telescope low-resolution survey ( R ∼ 1800). Employing simultaneous fitting with both single-star and binar...
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal Supplement Series |
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| Online Access: | https://doi.org/10.3847/1538-4365/ad856a |
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| author | Junhui Liu Bo Zhang Jianfeng Wu Yuan-Sen Ting |
| author_facet | Junhui Liu Bo Zhang Jianfeng Wu Yuan-Sen Ting |
| author_sort | Junhui Liu |
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| description | We report on a data-driven spectral model that we have developed for the identification of double-lined spectroscopic binary stars (SB2s) in the Large Sky Area Multi-Object fiber Spectroscopic Telescope low-resolution survey ( R ∼ 1800). Employing simultaneous fitting with both single-star and binary-star models, we detected over 4800 SB2 candidates, where both components are detectably contributing to the spectrum, from an initial pool of 2.6 million objects. Tests show that our model favors FGK-type main-sequence binaries with high mass ratio ( q ≥ 0.7) and large radial velocity (RV) separation (ΔRV ≥ 100 km s ^−1 ). Almost all of these candidates are positioned above the main sequence in the color–magnitude diagram, indicating their binary nature. Additionally, we utilized various observational data, including spectroscopy, photometry, parallax, and extinction, to determine multiple physical parameters such as the effective temperature, age, metallicity, RV, mass, mass ratio, stellar radius, along with their associated uncertainties for these SB2 candidates. For the 44 candidates with seven or more observational epochs, we provide complete orbital solutions. We make available catalogs containing various stellar parameters for identified SB2 systems. |
| format | Article |
| id | doaj-art-dbe441df52024bd49ef1ca4c142a3bf1 |
| institution | DOAJ |
| issn | 0067-0049 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Supplement Series |
| spelling | doaj-art-dbe441df52024bd49ef1ca4c142a3bf12025-08-20T02:51:12ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492024-01-0127524010.3847/1538-4365/ad856aDouble-lined Spectroscopic Binaries from the LAMOST Low-resolution SurveyJunhui Liu0https://orcid.org/0000-0002-7600-1670Bo Zhang1https://orcid.org/0000-0002-6434-7201Jianfeng Wu2https://orcid.org/0000-0001-7349-4695Yuan-Sen Ting3https://orcid.org/0000-0001-5082-9536Department of Astronomy, Xiamen University , Xiamen, Fujian 361005, People's Republic of China ; wujianfeng@xmu.edu.cn; Research School of Astronomy & Astrophysics, Australian National University , Cotter Rd., Weston, ACT 2611, AustraliaKey Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; bozhang@nao.cas.cnDepartment of Astronomy, Xiamen University , Xiamen, Fujian 361005, People's Republic of China ; wujianfeng@xmu.edu.cnResearch School of Astronomy & Astrophysics, Australian National University , Cotter Rd., Weston, ACT 2611, Australia; Department of Astronomy, The Ohio State University , Columbus, OH 43210, USA; Center for Cosmology and AstroParticle Physics (CCAPP), The Ohio State University , Columbus, OH 43210, USA; School of Computing, Australian National University , Acton, ACT 2601, AustraliaWe report on a data-driven spectral model that we have developed for the identification of double-lined spectroscopic binary stars (SB2s) in the Large Sky Area Multi-Object fiber Spectroscopic Telescope low-resolution survey ( R ∼ 1800). Employing simultaneous fitting with both single-star and binary-star models, we detected over 4800 SB2 candidates, where both components are detectably contributing to the spectrum, from an initial pool of 2.6 million objects. Tests show that our model favors FGK-type main-sequence binaries with high mass ratio ( q ≥ 0.7) and large radial velocity (RV) separation (ΔRV ≥ 100 km s ^−1 ). Almost all of these candidates are positioned above the main sequence in the color–magnitude diagram, indicating their binary nature. Additionally, we utilized various observational data, including spectroscopy, photometry, parallax, and extinction, to determine multiple physical parameters such as the effective temperature, age, metallicity, RV, mass, mass ratio, stellar radius, along with their associated uncertainties for these SB2 candidates. For the 44 candidates with seven or more observational epochs, we provide complete orbital solutions. We make available catalogs containing various stellar parameters for identified SB2 systems.https://doi.org/10.3847/1538-4365/ad856aSpectroscopySpectroscopic binary starsSky surveysClose binary starsAstronomy data analysis |
| spellingShingle | Junhui Liu Bo Zhang Jianfeng Wu Yuan-Sen Ting Double-lined Spectroscopic Binaries from the LAMOST Low-resolution Survey The Astrophysical Journal Supplement Series Spectroscopy Spectroscopic binary stars Sky surveys Close binary stars Astronomy data analysis |
| title | Double-lined Spectroscopic Binaries from the LAMOST Low-resolution Survey |
| title_full | Double-lined Spectroscopic Binaries from the LAMOST Low-resolution Survey |
| title_fullStr | Double-lined Spectroscopic Binaries from the LAMOST Low-resolution Survey |
| title_full_unstemmed | Double-lined Spectroscopic Binaries from the LAMOST Low-resolution Survey |
| title_short | Double-lined Spectroscopic Binaries from the LAMOST Low-resolution Survey |
| title_sort | double lined spectroscopic binaries from the lamost low resolution survey |
| topic | Spectroscopy Spectroscopic binary stars Sky surveys Close binary stars Astronomy data analysis |
| url | https://doi.org/10.3847/1538-4365/ad856a |
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