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The search for DA double white dwarf binary candidates from SDSS DR14

文献类型：期刊论文

作者Yan, Huahui1,2; Zhao, Jingkun2; Shi, Weibin1; Guo, Jincheng3; Li ZW(李振威)4; Lei, Zhenxin5; Zhao, Gang2,6
刊名ASTRONOMY & ASTROPHYSICS
出版日期2024-04-09
卷号684
关键词techniques: radial velocities binaries: general white dwarfs
ISSN号0004-6361
DOI10.1051/0004-6361/202347617
产权排序第4完成单位
文献子类Article
英文摘要Aims. Double white dwarf (DWD) binaries are one of the channels through which type Ia supernovae explosions occur. With the release of more and more sky survey data, the search for additional DWDs has become a possibility. We utilized the spectroscopic data from SDSS DR14 to search for DWD binaries based on variations in radial velocities (RVs). Methods. We obtained a sample of 4089 DA white dwarfs (WDs) with two or more spectra from SDSS DR14, and their RVs were derived using the cross-correlation function. Using the chi-squared (chi(2)) distribution of RVs as a base, we calculated the corresponding logarithmic probabilities (log p) for different degrees of freedom. Results. We selected the targets with log p < -3.0 and obtained 65 highly credible DWD candidates, of which 56 were newly discovered. We compared the distributions of the T-eff, log g, and mass of the DWD candidates and found that the mass distribution of DWDs has two peaks. The primary peak, located at 0.45 M-circle dot, is lower than the peak of the total WD sample, while the secondary peak, located at 0.60 M-circle dot, is similar to the peak of the total sample. Finally, we crossmatched our sample with Zwicky Transient Facility (ZTF) photometry data and identified two targets with clear periodic variability. Based on the shape of their light curve, we think both could be white dwarf main-sequence binary stars
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
WOS关键词DIGITAL SKY SURVEY ; TRANSIENT FACILITY DATA ; IA SUPERNOVAE ; DOUBLE-DETONATION ; SPECTROSCOPIC ANALYSIS ; SHORT-PERIOD ; SYSTEMATIC SEARCH ; MASS-DISTRIBUTION ; SPACE DENSITY ; GAIA EDR3
资助项目National Natural Science Foundation of China; Innovation Project of Beijing Academy of Science and Technology
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001198946600002
出版者EDP SCIENCES S A
资助机构National Natural Science Foundation of China ; Innovation Project of Beijing Academy of Science and Technology[11000023T000002062763-23CB059, CMS-CSST-2021-A10] ; [11988101] ; [12273055] ; [11890694] ; [11973048] ; [11927804] ; [12203006]
源URL[http://ir.ynao.ac.cn/handle/114a53/27098]  
专题云南天文台_大样本恒星演化研究组
作者单位1.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Shandong University at Weihai, Weihai 264209, PR China;
2.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, PR China;
3.Department of Scientific Research, Beijing Planetarium, Xizhimenwai Street, Beijing 100044, PR China;
4.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, PR China;
5.Key Laboratory of Stars and Interstellar Medium, Xiangtan University, Xiangtan 411105, PR China;
6.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, PR China
推荐引用方式
GB/T 7714		 Yan, Huahui,Zhao, Jingkun,Shi, Weibin,et al. The search for DA double white dwarf binary candidates from SDSS DR14[J]. ASTRONOMY & ASTROPHYSICS,2024,684.
APA Yan, Huahui.,Zhao, Jingkun.,Shi, Weibin.,Guo, Jincheng.,李振威.,...&Zhao, Gang.(2024).The search for DA double white dwarf binary candidates from SDSS DR14.ASTRONOMY & ASTROPHYSICS,684.
MLA Yan, Huahui,et al."The search for DA double white dwarf binary candidates from SDSS DR14".ASTRONOMY & ASTROPHYSICS 684(2024).

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来源：云南天文台

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