A possible expanding component in the extreme mass ratio deep contact binary V710 Monocerotis

L. Liu; W. P. Chen; W. W. Na; S. B. Qian; L. Zhang; B. Soonthornthum; P. Neelam; L. Y. Zhu; J. J. He; Z. T. Han

doi:10.1016/j.newast.2014.03.001

A possible expanding component in the extreme mass ratio deep contact binary V710 Monocerotis

L. Liu, W. P. Chen, W. W. Na, S. B. Qian, L. Zhang, B. Soonthornthum, P. Neelam, L. Y. Zhu, J. J. He, Z. T. Han

Graduate Institute of Astronomy

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We present CCD light curves of V710 Mon obtained in 2007 and 2013. By using the 2010 version of the W-D code, it is found that the star is a deep (59.5-62.7%) contact binary system, with an extreme mass ratio (0.143-0.183). The period of the system increases with a rate dP/dt=+1.95(±0.06) ×10^-7 days/year. We propose that the system contains a post-main-sequence component which may be in an expanding phase. The time scale of the orbital increase nearly equals to the time for the post-main-sequence star to evolve into a subgiant. The age of the primary is estimated to be 5.34 Gyr.

Original language	English
Pages (from-to)	60-64
Number of pages	5
Journal	New Astronomy
Volume	31
DOIs	https://doi.org/10.1016/j.newast.2014.03.001
State	Published - Aug 2014

Keywords

Stars: binaries: close
Stars: binaries: eclipsing
Stars: binaries: evolution
Stars: individual: V710 Mon

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10.1016/j.newast.2014.03.001

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@article{46e032e5389d4a80860b026e51428f91,

title = "A possible expanding component in the extreme mass ratio deep contact binary V710 Monocerotis",

abstract = "We present CCD light curves of V710 Mon obtained in 2007 and 2013. By using the 2010 version of the W-D code, it is found that the star is a deep (59.5-62.7%) contact binary system, with an extreme mass ratio (0.143-0.183). The period of the system increases with a rate dP/dt=+1.95(±0.06) ×10-7 days/year. We propose that the system contains a post-main-sequence component which may be in an expanding phase. The time scale of the orbital increase nearly equals to the time for the post-main-sequence star to evolve into a subgiant. The age of the primary is estimated to be 5.34 Gyr.",

keywords = "Stars: binaries: close, Stars: binaries: eclipsing, Stars: binaries: evolution, Stars: individual: V710 Mon",

author = "L. Liu and Chen, {W. P.} and Na, {W. W.} and Qian, {S. B.} and L. Zhang and B. Soonthornthum and P. Neelam and Zhu, {L. Y.} and He, {J. J.} and Han, {Z. T.}",

note = "Funding Information: This work is partly supported by Chinese Natural Science Foundation (Nos. 11103074 , 11325315 and 11133007 ) and by West Light Foundation of the Chinese Academy of Sciences. We are grateful to the anonymous referee who provided useful suggestions to improve the paper.",

year = "2014",

month = aug,

doi = "10.1016/j.newast.2014.03.001",

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volume = "31",

pages = "60--64",

journal = "New Astronomy",

issn = "1384-1076",

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TY - JOUR

T1 - A possible expanding component in the extreme mass ratio deep contact binary V710 Monocerotis

AU - Liu, L.

AU - Chen, W. P.

AU - Na, W. W.

AU - Qian, S. B.

AU - Zhang, L.

AU - Soonthornthum, B.

AU - Neelam, P.

AU - Zhu, L. Y.

AU - He, J. J.

AU - Han, Z. T.

N1 - Funding Information: This work is partly supported by Chinese Natural Science Foundation (Nos. 11103074 , 11325315 and 11133007 ) and by West Light Foundation of the Chinese Academy of Sciences. We are grateful to the anonymous referee who provided useful suggestions to improve the paper.

PY - 2014/8

Y1 - 2014/8

N2 - We present CCD light curves of V710 Mon obtained in 2007 and 2013. By using the 2010 version of the W-D code, it is found that the star is a deep (59.5-62.7%) contact binary system, with an extreme mass ratio (0.143-0.183). The period of the system increases with a rate dP/dt=+1.95(±0.06) ×10-7 days/year. We propose that the system contains a post-main-sequence component which may be in an expanding phase. The time scale of the orbital increase nearly equals to the time for the post-main-sequence star to evolve into a subgiant. The age of the primary is estimated to be 5.34 Gyr.

AB - We present CCD light curves of V710 Mon obtained in 2007 and 2013. By using the 2010 version of the W-D code, it is found that the star is a deep (59.5-62.7%) contact binary system, with an extreme mass ratio (0.143-0.183). The period of the system increases with a rate dP/dt=+1.95(±0.06) ×10-7 days/year. We propose that the system contains a post-main-sequence component which may be in an expanding phase. The time scale of the orbital increase nearly equals to the time for the post-main-sequence star to evolve into a subgiant. The age of the primary is estimated to be 5.34 Gyr.

KW - Stars: binaries: close

KW - Stars: binaries: eclipsing

KW - Stars: binaries: evolution

KW - Stars: individual: V710 Mon

UR - http://www.scopus.com/inward/record.url?scp=84897380889&partnerID=8YFLogxK

U2 - 10.1016/j.newast.2014.03.001

DO - 10.1016/j.newast.2014.03.001

M3 - 期刊論文

AN - SCOPUS:84897380889

SN - 1384-1076

VL - 31

SP - 60

EP - 64

JO - New Astronomy

JF - New Astronomy

ER -

A possible expanding component in the extreme mass ratio deep contact binary V710 Monocerotis

Abstract

Keywords

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