The White Dwarf Binary Pathways Survey. V. The Gaia White Dwarf Plus AFGK Binary Sample and the Identification of 23 Close Binaries
文献类型：期刊论文
| 作者 | Ren,J.-J.4; Raddi,R.5; Rebassa-Mansergas,A.5,6; Hernandez,M. S.7; Parsons,S. G.8; Irawati,P.9; Rittipruk,P.9; Schreiber,M. R.10,11; G?nsicke,B. T.12,13; Torres,S.5,6 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 905期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Close binary stars White dwarf stars |
| DOI | 10.3847/1538-4357/abc017 |
| 英文摘要 | Abstract Close white dwarf binaries consisting of a white dwarf and an A-, F-, G-, or K-type main-sequence star, henceforth close WD+AFGK binaries, are ideal systems to understand the nature of type Ia supernovae progenitors and to test binary evolution models. In this work we identify 775 WD+AFGK candidates from TGAS (The Tycho-Gaia Astrometric Solution) and Gaia Data Release 2 (DR2), a well-defined sample of stars with available parallaxes, and we measure radial velocities (RVs) for 275 of them with the aim of identifying close binaries. The RVs have been measured from high-resolution spectra obtained at the Xinglong 2.16 m Telescope and the San Pedro Mártir 2.12 m Telescope and/or from available LAMOST DR6 (low-resolution) and RAVE DR5 (medium-resolution) spectra. We identify 23 WD+AFGK systems displaying more than 3σ RV variation among 151 systems for which the measured values are obtained from different nights. Our WD+AFGK binary sample contains both AFGK dwarfs and giants, with a giant fraction ～43%. The close binary fractions we determine for the WD+AFGK dwarf and giant samples are ?24% and ?15%, respectively. We also determine the stellar parameters (i.e., effective temperature, surface gravity, metallicity, mass, and radius) of the AFGK companions with available high-resolution spectra. The stellar parameter distributions of the AFGK companions that are members of close and wide binary candidates do not show statistically significant differences. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-905-1-ABC017 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/61131]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Ren,J.-J. |
| 作者单位 | 1.Department of Astronomy, Peking University, Beijing 100871, People’s Republic of China 2.South-Western Institute for Astronomy Research, Yunnan University, Kunming, Yunnan, 650091, People’s Republic of China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan observatories, Chinese Academy of Sciences, Kunming 650216, Yunnan Province, People’s Republic of China 4.CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; jjren@nao.cas.cn 5.Departament de Física, Universitat Politècnica de Catalunya, c/Esteve Terrades 5, E-08860 Castelldefels, Spain 6.Institute for Space Studies of Catalonia, c/Gran Capità 2–4, Edif. Nexus 201, E-08034 Barcelona, Spain 7.Instituto de Física y Astronomía, Universidad de Valparaíso, Avenida Gran Breta?a 1111, Valparaíso, Chile 8.Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK 9.National Astronomical Research Institute of Thailand, Sirindhorn AstroPark, Donkaew, Mae Rim, Chiang Mai 50180, Thailand 10.Departamento de Física, Universidad Técnica Federico Santa María, Av. Espa?a 1680, Valparaíso, Chile |
| 推荐引用方式 GB/T 7714 | Ren,J.-J.,Raddi,R.,Rebassa-Mansergas,A.,et al. The White Dwarf Binary Pathways Survey. V. The Gaia White Dwarf Plus AFGK Binary Sample and the Identification of 23 Close Binaries[J]. The Astrophysical Journal,2020,905(1). |
| APA | Ren,J.-J..,Raddi,R..,Rebassa-Mansergas,A..,Hernandez,M. S..,Parsons,S. G..,...&Tian,H..(2020).The White Dwarf Binary Pathways Survey. V. The Gaia White Dwarf Plus AFGK Binary Sample and the Identification of 23 Close Binaries.The Astrophysical Journal,905(1). |
| MLA | Ren,J.-J.,et al."The White Dwarf Binary Pathways Survey. V. The Gaia White Dwarf Plus AFGK Binary Sample and the Identification of 23 Close Binaries".The Astrophysical Journal 905.1(2020). |
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