YNAO OpenIR  > 双星与变星研究组
Orbital Period Investigation of Some Eclipsing CVs and pre-CVs
Qian SB(钱声帮)1; Soonthornthum, B2; Dai ZB(戴智斌)1; Zhu LY(朱俐颖)1; He JJ(何家佳)1; Liao WP(廖文萍)1; Li LJ(李临甲)1
Source PublicationAstronomical Society of the Pacific (ASP) Conference Series - EIGHTH PACIFIC RIM CONFERENCE ON STELLAR ASTROPHYSICS: A TRIBUTE TO KAM-CHING LEUNG
2009
Volume404
Pages248-254
Author of SourceSoonthornthum, B; Komonjinda, S; Cheng, KS; Leung, KC
Contribution Rank第1完成单位
Indexed ByCPCI
Conference Name8th Pacific Rim Conference on Stellar Astrophysics
Conference Date2008-05-05
Conference PlacePhuket, THAILAND
Conference SponsorNatl Astron Res Inst Thailand; Thailand Convent & Exhibit Bur; Int Astron Union
Abstract

Orbital period variations of some eclipsing cataclysmic variable stars (e.g., SW Sex-type CVs) and pre-CVs (e.g., HW Vir-type binaries) were analyzed by including some new times of light minimum obtained with several small telescopes in the world. It is found that the orbital periods of most sample stars show a cyclic change while they undergo a long-term variation. The evidence of magnetic breaking (NIB) for fully convective star was given. Our investigation indicates that the evolution of CVs with period shorter than 3 hours may be also governed by NIB, which is in agreement with new period distribution of CVs and with the results that fully convective stars are very active, with strong and stable magnetic field. It is revealed that the treat of MB in the standard theory should be modified and in this way the "period minimum" problem can be solved. The long-term period changes and the relation between the orbital period and its rate of change (dP/dt) are discovered for SW Sex-type CVs. These results supported that SW Sex-type CVs have the highest luminosity among CVs and was the reason that results in the observed SW Sextantis phenomena. We show that the cyclic period variations can not be explained by the mechanism of magnetic activity cycles of the late type component because of the problem of energy. The light-travel time effect via the presence of a tertiary component is the most possible mechanism to interpret the periodic change. It is shown that the extremely low-mass objects (e.g., brown dwarf stars and huge planets) are usually encountered as a tertiary component in CVs and pre-CVs.

Funding OrganizationN/A
Language英语
Subject Area天文学 ; 天体物理学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeProceedings Paper
PublisherASTRONOMICAL SOC PACIFIC
Publication Place390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
ISBN978-1-58381-685-1
URL查看原文
Archive Date2010-10-14
WOS IDWOS:000271628900047
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCataclysmic Variables ; Hw Virginis ; Stars
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5949
Collection双星与变星研究组
Corresponding AuthorQian SB(钱声帮)
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, 650011, Kunming, China
2.National Astronomical Research Institute of Thailand, Ministry of Science and Technology, Chiang Mai 50200, Thailand
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Soonthornthum, B,Dai ZB,et al. Orbital Period Investigation of Some Eclipsing CVs and pre-CVs[C]//Soonthornthum, B; Komonjinda, S; Cheng, KS; Leung, KC. 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA:ASTRONOMICAL SOC PACIFIC,2009:248-254.
Files in This Item:
File Name/Size DocType Version Access License
Orbital Period Inves(158KB)会议论文 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Qian SB(钱声帮)]'s Articles
[Soonthornthum, B]'s Articles
[Dai ZB(戴智斌)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Qian SB(钱声帮)]'s Articles
[Soonthornthum, B]'s Articles
[Dai ZB(戴智斌)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Qian SB(钱声帮)]'s Articles
[Soonthornthum, B]'s Articles
[Dai ZB(戴智斌)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Orbital Period Investigation of Some Eclipsing CVs and pre-CVs.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.