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

doi:10.1093/mnras/stad1880

YNAO OpenIR > 双星与变星研究组

	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
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2023-10-10
卷号	526 期号:3 页码:3730-3743
DOI	10.1093/mnras/stad1880
产权排序	第1完成单位
收录类别	SCI ; EI
关键词	stars: binaries: eclipsing stars: individual (SDSS J081256.85+191157.8) stars: novae, cataclysmic variables
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.
资助项目	National Natural Science Foundation of China[11933008]; National Natural Science Foundation of China[12103084]
项目资助者	National Natural Science Foundation of China[11933008, 12103084]
语种	英语
学科领域	天文学
文章类型	Article
出版者	OXFORD UNIV PRESS
出版地	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN	0035-8711
URL	查看原文
WOS记录号	WOS:001142416100001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	NOVA OY-CARINAE ; CATACLYSMIC VARIABLES ; NEGATIVE SUPERHUMPS ; KEPLER OBSERVATIONS ; ACCRETION DISCS ; KIC 9406652 ; V344 LYRAE ; SUPEROUTBURSTS ; SIMULATIONS ; PHOTOMETRY
EI入藏号	20234515021787
EI主题词	Photometry
EI分类号	657.2 Extraterrestrial Physics and Stellar Phenomena - 941.4 Optical Variables Measurements
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/26523
专题	双星与变星研究组
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; 2.Department of Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, China; 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China; 4.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, Beijing 101408, China
第一作者单位	中国科学院云南天文台
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.

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