Analysis of Two Eclipsing Hot Subdwarf Binaries with a Low Mass Stellar and a Brown Dwarf Companion

被引：0

作者：

Schaffenroth, Veronika ^{[1
]}

Geier, Stephan ^{[1
]}

Heber, Ulrich ^{[1
]}

Drechsel, Horst ^{[1
]}

Ostensen, Roy H.

Maxted, Pierre F. L.

Kupfer, Thomas ^{[1
]}

Barlow, Brad N.

机构：

[1] Univ Erlangen Nurnberg, Dr Karl Remeis Observ, Astron Inst, Sternwartstr 7, D-96049 Bamberg, Germany

来源：

PLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE | 2011年 / 1331卷

关键词：

HW Vir; eclipsing binaries; sdB; brown dwarf; B STARS; RADIATION; PLANETS; MODELS;

D O I：

10.1063/1.3556199

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The formation of hot subdwarf stars (sdBs), which are core helium-burning stars located on the extended horizontal branch, is still not understood. Many of the known hot subdwarf stars reside in close binary systems with short orbital periods between a few hours and a few days with either M star or white dwarf companions. Common envelope ejection is the most probable formation channel. Among these, eclipsing systems are of special importance because it is possible to constrain the parameters of both components tightly by combining spectroscopic and light curve analyses. We report the discovery of two eclipsing binaries with a brown dwarf (< 0.07 M-circle dot) and a 0.15 M-circle dot late main sequence star companion in close orbits around sdB stars.

引用

页码：174 / +

页数：2

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