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The Orbital Nature of 81 Ellipsoidal Red Giant Binaries in the Large Magellanic Cloud
Nie, J. D.1; Wood, P. R.2; Nicholls, C. P.3
2017-02-01
Source PublicationASTROPHYSICAL JOURNAL
Volume835Issue:2
AbstractIn this paper, we collect a sample of 81 ellipsoidal red giant binaries in the Large Magellanic Cloud (LMC), and we study their orbital natures individually and statistically. The sample contains 59 systems with circular orbits and 22 systems with eccentric orbits. We derive orbital solutions using the 2010 version of the Wilson-Devinney code. The sample is selection-bias corrected, and the orbital parameter distributions are compared to model predictions for the LMC and to observations in the solar vicinity. The masses of the red giant primaries are found to range from about 0.6 to 9 M-circle dot with a peak at around 1.5 M-circle dot, in agreement with studies of the star formation history of the LMC, which find a burst of star formation beginning around 4 Gyr ago. The observed distribution of mass ratios q= m(2)/m(1) is more consistent with the flat q distribution derived for the solar vicinity by Raghavan et al. than it is with the solar vicinity q distribution derived by Duquennoy & Mayor. There is no evidence for an excess number of systems with equal mass components. We find that about 20% of the ellipsoidal binaries have eccentric orbits, twice the fraction estimated by Soszynski et al. Our eccentricity evolution test shows that the existence of eccentric ellipsoidal red giant binaries on the upper parts of the red giant branch (RGB) can only be explained if tidal circularization rates are similar to 1/100 the rates given by the usual theory of tidal dissipation in convective stars.
SubtypeArticle
KeywordBinaries: Close Magellanic Clouds Stars: Agb And post-Agb
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11303043) ; National Natural Science Foundation of China (NSFC)(11303043) ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Australian Research Council's Discovery Projects funding scheme(DP120103337) ; Australian Research Council's Discovery Projects funding scheme(DP120103337) ; Austrian Science Fund (FWF)(M 1696-N27) ; Austrian Science Fund (FWF)(M 1696-N27) ; National Natural Science Foundation of China (NSFC)(11303043) ; National Natural Science Foundation of China (NSFC)(11303043) ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Australian Research Council's Discovery Projects funding scheme(DP120103337) ; Australian Research Council's Discovery Projects funding scheme(DP120103337) ; Austrian Science Fund (FWF)(M 1696-N27) ; Austrian Science Fund (FWF)(M 1696-N27)
DOI10.3847/1538-4357/835/2/209
WOS KeywordGRAVITATIONAL LENSING EXPERIMENT ; PERIOD-LUMINOSITY RELATIONS ; COLOR-TEMPERATURE RELATIONS ; FIELD SPECTROGRAPH WIFES ; SOLAR-TYPE STARS ; VELOCITY CURVES ; TIDAL EVOLUTION ; VARIABLE-STARS ; POPULATIONS ; VARIABILITY
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11303043) ; National Natural Science Foundation of China (NSFC)(11303043) ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Australian Research Council's Discovery Projects funding scheme(DP120103337) ; Australian Research Council's Discovery Projects funding scheme(DP120103337) ; Austrian Science Fund (FWF)(M 1696-N27) ; Austrian Science Fund (FWF)(M 1696-N27) ; National Natural Science Foundation of China (NSFC)(11303043) ; National Natural Science Foundation of China (NSFC)(11303043) ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Australian Research Council's Discovery Projects funding scheme(DP120103337) ; Australian Research Council's Discovery Projects funding scheme(DP120103337) ; Austrian Science Fund (FWF)(M 1696-N27) ; Austrian Science Fund (FWF)(M 1696-N27)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000401154800001
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8780
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
2.Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia
3.Univ Vienna, Inst Astrophys, Turkenschanzstr 17, A-1180 Vienna, Austria
Recommended Citation
GB/T 7714
Nie, J. D.,Wood, P. R.,Nicholls, C. P.. The Orbital Nature of 81 Ellipsoidal Red Giant Binaries in the Large Magellanic Cloud[J]. ASTROPHYSICAL JOURNAL,2017,835(2).
APA Nie, J. D.,Wood, P. R.,&Nicholls, C. P..(2017).The Orbital Nature of 81 Ellipsoidal Red Giant Binaries in the Large Magellanic Cloud.ASTROPHYSICAL JOURNAL,835(2).
MLA Nie, J. D.,et al."The Orbital Nature of 81 Ellipsoidal Red Giant Binaries in the Large Magellanic Cloud".ASTROPHYSICAL JOURNAL 835.2(2017).
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