NSVS 11868841: An active detached eclipsing binary system with a substellar object

被引：0

作者：

Zhang, B. ^{[1
,2
]}

Qian, S-B ^{[1
,2
,3
,4
,5
,6
]}

Zhi, Q-J ^{[1
,2
]}

Dong, A-J ^{[1
,2
]}

Zhu, L-Y ^{[3
,4
]}

机构：

[1] Guizhou Normal Univ Guiyang, Sch Phys & Elect Sci, Guiyang 550025, Peoples R China

[2] GuiyangGuizhou Normal Univ, Guizhou Prov Key Lab Radio Astron & Data Proc, Guiyang 550025, Peoples R China

[3] Chinese Acad Sci CAS Kunming, Yunnan Observ, POB 110, Kunming 650216, Yunnan, Peoples R China

[4] KunmingChinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, POB 110, Kunming 650216, Yunnan, Peoples R China

[5] Univ Chinese Acad Sci, Yuquan Rd 19,Sijingshang Block, Beijing 100049, Peoples R China

[6] Chinese Acad Sci, Ctr Astron Megasci, 20A Datun Rd, Beijing 100012, Peoples R China

来源：

NEW ASTRONOMY | 2022年 / 91卷

基金：

中国国家自然科学基金;

关键词：

Binary; Eclipsing binary; Orbital period; Light curves; ORBITAL PERIOD MODULATION; LIGHT CURVES; EVOLUTION;

D O I：

10.1016/j.newast.2021.101678

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Four-color CCD photometric light curves (LCs) of eclipsing binary (EB) NSVS 11868841 are presented in this paper. These LCs are analyzed by using the 2013 version of the Wilson-Devinney (W-D) code. We found that NSVS 11868841 is a late-type low-mass detached EB with an orbit inclination nearly 90 degrees. The LCs are asymmetric, especially in its out-of-eclipse. Based on all available times of the light minimum, we analyzed the variations of the orbital period by using the (O-C) method. The O-C curve shows a cycle oscillation with a period of 11.83(+/- 0.04) years and an amplitude of 0.0009 days (similar to 1.3 min). This cyclic change detected in NSVS 11868841 could be explained by the light-travel time effect (LTTE) via the presence of a third body. Subsequently, we calculated the mass of this third component as M(3)sin(i(3))=0.047(+/- 0.015)M-circle dot. If the third body is coplanar with the central system, it may be a brown dwarf. And this discovery will provide important insights on the formation and evolution of brown dwarf companions.

引用

页数：5