V723 Persei: A short-period Algol-like near-contact binary
文献类型:期刊论文
作者 | Tian XM(田晓慢)1,2,3; Zhu LY(朱俐颖)1,2,3,4 |
刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN |
出版日期 | 2019-06-01 |
卷号 | 71期号:3页码:9 |
ISSN号 | 0004-6264 |
关键词 | stars: binaries: close stars: binaries: eclipse stars: binaries: individual (V723 Persei) stars: evolution |
DOI | 10.1093/pasj/psz044 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Complete multi-color photometric observations in the BVRC/(C) bands and low-resolution spectra of the short-period binary V723 Per are presented for the first time. The stellar atmospheric parameters of effective temperature, gravitational acceleration, and metallicity are determined as T-eff = 7407 +/- 53 K, log g = 3.98 +/- 0.10 cms(-2), and [Fe/H] = -0.25 +/- 0.10 dex, respectively. Photometric solutions are obtained by analyzing the phased light curves with the Wilson-Devinney method. We found that V723 Per is an Algol-like semi-detached-type near-contact binary with a mass ratio of q = 0.3168 +/- 0.0011. The secondary component is filling the critical Roche lobe, while the primary is nearly filling its Roche lobe (the filling degree is about 80.93%). The primary component contributes about 96% of the luminosity of the total system, and the temperature difference between the two component stars is about 3000 K. All available times of light minimum, including three new observed eclipse times, were used to construct the O - C curve. The period shows a continuous increase at a rate of dP/dt = +7.63(+/- 0.75) x 10(-6) dyr(-1) superposed with a periodic oscillation of amplitude of 0.0392 d and period 17.4 yr. The period increase could be explained by mass transfer from the secondary component to the primary one on the thermal timescale, which is in agreement with the semi-detached configuration. The cyclic change may be caused by the light-time effect due to a massive (M-3 = 3.03 M-circle dot) but quite faint (L-3/L-total similar or equal to 3%) tertiary companion orbiting the central binary. Such a third body might be a black hole or a binary with two nearly identical stars. More observations are required in the future to confirm our conclusion about the cycle variation and tertiary companion. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
WOS关键词 | ANGULAR-MOMENTUM LOSS ; UNSOLVED QUADRUPLE SYSTEM ; POSSIBLE MASS ; PARAMETERS ; COMPANION ; DELPHINI ; CATALOG ; CURVES ; STARS |
资助项目 | National Natural Science Foundation of China[11573063] ; National Natural Science Foundation of China[11611530685] ; Key Science Foundation of Yunnan Province[2017FA001] ; CAS "Light of West China" Program ; CAS Interdisciplinary Innovation Team |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000489564600018 |
资助机构 | National Natural Science Foundation of China[11573063, 11611530685] ; Key Science Foundation of Yunnan Province[2017FA001] ; CAS "Light of West China" Program ; CAS Interdisciplinary Innovation Team |
源URL | [http://ir.ynao.ac.cn/handle/114a53/21420] |
专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
通讯作者 | Tian XM(田晓慢) |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P. O. Box 110, 650216 Kunming, China 2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. O. Box 110, 650216 Kunming, China 3.University of the Chinese Academy of Science, Yuquan Road 19, Sijingshang Block, 100049 Beijing, China 4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, P. R. China |
推荐引用方式 GB/T 7714 | Tian XM,Zhu LY. V723 Persei: A short-period Algol-like near-contact binary[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2019,71(3):9. |
APA | Tian XM,&Zhu LY.(2019).V723 Persei: A short-period Algol-like near-contact binary.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,71(3),9. |
MLA | Tian XM,et al."V723 Persei: A short-period Algol-like near-contact binary".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 71.3(2019):9. |
入库方式: OAI收割
来源:云南天文台
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。