New evidence for the precession of tilted disc in SDSS J081256.85+191157.8

doi:10.1093/mnras/stad1880

	New evidence for the precession of tilted disc in SDSS J081256.85+191157.8
	Sun QB(孙起斌)1,2,3,4; Qian SB(钱声帮)1,2,3,4; Zhu LY(朱俐颖)1,3,4; Liao WP(廖文萍)1,3,4; Zhao EG(赵二刚)1,3; Li FX(李福兴)1,3; Shi XD(施相东)1,3; Li MY(李敏榆)1,3,4
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2023-10-10
卷号	526 期号:3 页码:3730-3743
关键词	stars: binaries: eclipsing stars: individual (SDSS J081256.85+191157.8) stars: novae, cataclysmic variables
ISSN号	0035-8711
DOI	10.1093/mnras/stad1880
产权排序	第1完成单位
文献子类	Article
英文摘要	Superorbital signals and negative superhumps are thought to be related to the reverse precession of the nodal line in a tilted disc, but the evidence is lacking. Our results provide new evidence for the precession of the tilted disc. Based on the TESS and K2 photometry, we investigate the superorbital signals, negative superhumps, positive superhumps, and eclipse characteristics of the long-period eclipsing cataclysmic variable star SDSS J0812. We find superorbital signals, negative superhumps, and positive superhumps with periods of 3.0451(5) d, 0.152047(2) d, and 0.174686 (7) d, respectively, in the K2 photometry, but all disappear in the TESS photometry, where the positive superhumps are present only in the first half of the same campaign, confirming that none of them is permanently present in SDSS J0812. In addition, we find for the first time a cyclic variation of the O-C of minima, eclipse depth, and negative superhumps amplitudes for 3.045 (8) d, 3.040(6) d, and 3.053 (8) d in SDSS J0812, respectively, and all reach the maximum at similar to 0.75 precession phases of the tilted disc, which provides new evidence for the precession of the tilted disc. We suggest that the O-C and eclipse depth variations may come from a shift of the brightness centre of the precession tilted disc. Our first finding on the periodic variation of negative superhumps amplitude with the superorbital signals is significant evidence that the origin of negative superhumps is related to the precession of the tilted disc.
学科主题	天文学
URL标识	查看原文
出版地	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
资助项目	National Natural Science Foundation of China[11933008]; National Natural Science Foundation of China[12103084]
WOS关键词	NOVA OY-CARINAE ; CATACLYSMIC VARIABLES ; NEGATIVE SUPERHUMPS ; KEPLER OBSERVATIONS ; ACCRETION DISCS ; KIC 9406652 ; V344 LYRAE ; SUPEROUTBURSTS ; SIMULATIONS ; PHOTOMETRY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:001142416100001
资助机构	National Natural Science Foundation of China[11933008, 12103084]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26523]
专题	云南天文台_双星与变星研究组
作者单位	1.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China; 2.Department of Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; 4.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, Beijing 101408, China
推荐引用方式 GB/T 7714	Sun QB,Qian SB,Zhu LY,et al. New evidence for the precession of tilted disc in SDSS J081256.85+191157.8[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,526(3):3730-3743.
APA	孙起斌.,钱声帮.,朱俐颖.,廖文萍.,赵二刚.,...&李敏榆.(2023).New evidence for the precession of tilted disc in SDSS J081256.85+191157.8.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,526(3),3730-3743.
MLA	孙起斌,et al."New evidence for the precession of tilted disc in SDSS J081256.85+191157.8".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 526.3(2023):3730-3743.