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

doi:10.1051/0004-6361/202347617

	The search for DA double white dwarf binary candidates from SDSS DR14
	Yan, Huahui 5,6; Zhao, Jingkun 5; Shi, Weibin 6; Guo, Jincheng 4; Li ZW(李振威)1; Lei, Zhenxin 3; Zhao, Gang 2,5
刊名	Astronomy and Astrophysics
	2024-04-01
卷号	684
关键词	techniques: radial velocities binaries: general white dwarfs
ISSN号	0004-6361
DOI	10.1051/0004-6361/202347617
产权排序	第4完成单位
文献子类	Journal article (JA)
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 (χ2) 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 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., is lower than the peak of the total WD sample, while the secondary peak, located at 0.60 M., 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 © 2024 EDP Sciences. All rights reserved.
学科主题	天文学 ; 恒星与银河系
URL标识	查看原文
资助项目	N/A
语种	英语
资助机构	N/A
内容类型	期刊论文
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.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China; 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, 100049, China 3.Key Laboratory of Stars and Interstellar Medium, Xiangtan University, Xiangtan, 411105, China; 4.Department of Scientific Research, Beijing Planetarium, Xizhimenwai Street, Beijing, 100044, China; 5.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, China; 6.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Shandong University at Weihai, Weihai, 264209, 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 and 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 and Astrophysics,684.
MLA	Yan, Huahui,et al."The search for DA double white dwarf binary candidates from SDSS DR14".Astronomy and Astrophysics 684(2024).