HL Dra: an active Algol-like binary system with a pulsating component star and a cool third body
HL Dra: an active Algol-like binary system with a pulsating component star and a cool third body
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HL Dra：一个活跃的类大陵五双星系统，具有脉动恒星和凉爽的第三体
DOI：
10.1093/mnras/stab1657
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发表时间：
2021-07
影响因子：
4.8
通讯作者：
Wen-ping Liao
中科院分区：
文献类型：
--
作者：
Xiang-dong Shi;Sheng-bang Qian;Lin-jia Li;Wen-ping Liao
摘要
ABSTRACT
HL Draconis (HL Dra) is an oscillating eclipsing binary with an orbital period of 0.944276 d. By analysing the light curves observed with the Transiting Exoplanet Survey Satellite (TESS), it has been detected that HL Dra is an Algol-like binary system with a mass ratio of 0.361, where the radius filling factor (=r/RL) of the primary and secondary component is $87\, {{\ \rm per\ cent}}$ and $98\, {{\ \rm per\ cent}}$, respectively. The secondary component is almost filling its critical Roche lobe, but not entirely. The absolute parameters of the component are estimated in this paper. Both the variable O’Connell effect and the existence of superflares indicate that the secondary should have strong magnetic activities. It is discovered that the O − C curve shows a sinusoidal variation with a period of 129.88 yr. This cyclic change might be caused by the effects of the light travel time as a result of the presence of a cool red dwarf third body. The correlations between the changes of the O − C diagrams and the variable O’Connell effect during TESS observations might be caused by the magnetic activity of the secondary (i.e. the Applegate mechanism). After removal of the binary model, a total of 252 pulsation frequencies are detected from the high-precision photometric data of TESS, including 28 multiplets of tidally split frequencies. We identify two radial modes, 21 non-radial p-modes and three non-radial f-modes from the possible independent frequencies. All of these features reveal that HL Dra is a very interesting system for further investigations of binary formation and evolution, and for tidal interactions on stellar pulsations and on magnetic activities.
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影响因子：
6.5
作者：
P. Kervella;Frédéric Arenou;F. Mignard;F. Th'evenin
通讯作者：
P. Kervella;Frédéric Arenou;F. Mignard;F. Th'evenin
影响因子：
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作者：
E. Bahar;O. Yörükoǧlu;E. M. Esmer;T. Kılıçoğlu;D. Öztürk;M. B. Doğruel;D. Ozuyar;D. Gümüş;D. D. Izci-D.;B. Keten;C. T. Tezcan;H. V. Şenavcı;M. Yılmaz;Ö. Baştürk;S. Selam;F. Ekmekçi;B. Albayrak;S. Caliskan;A. Akcar
通讯作者：
E. Bahar;O. Yörükoǧlu;E. M. Esmer;T. Kılıçoğlu;D. Öztürk;M. B. Doğruel;D. Ozuyar;D. Gümüş;D. D. Izci-D.;B. Keten;C. T. Tezcan;H. V. Şenavcı;M. Yılmaz;Ö. Baştürk;S. Selam;F. Ekmekçi;B. Albayrak;S. Caliskan;A. Akcar
DOI：
10.3847/1538-3881/aaf0fb
发表时间：
2018-11
期刊：
The Astronomical Journal
影响因子：
--
作者：
Jae Woo Lee;K. Hong;M. Kristiansen
通讯作者：
Jae Woo Lee;K. Hong;M. Kristiansen
DOI：
10.1088/2041-8205/811/2/l29
发表时间：
2015-09
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
A. G. Hern'andez;S. Mart'in-Ruiz;M. Monteiro;J. C. Su'arez;D. Reese;J. Pascual-Granado;R. Garrido
通讯作者：
A. G. Hern'andez;S. Mart'in-Ruiz;M. Monteiro;J. C. Su'arez;D. Reese;J. Pascual-Granado;R. Garrido
DOI：
10.1088/0004-6256/144/3/73
发表时间：
2012-07
期刊：
The Astronomical Journal
影响因子：
--
作者：
R. Wilson
通讯作者：
R. Wilson