SPECTROSCOPIC ORBITS OF THREE DWARF BARIUM STARS

被引：0

作者：

North, P. L. ^{[1
]}

Jorissen, A. ^{[2
]}

Escorza, A. ^{[2
,3
]}

Miszalski, B. ^{[4
,5
]}

Mikolajewska, J. ^{[6
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys, Lab Astrophys, Lausanne, Switzerland

[2] Univ Libre Bruxelles, Inst Astron & Astrophys, Brussels, Belgium

[3] Katholieke Univ Leuven, Inst Sterrenkunde, Leuven, Belgium

[4] South African Astron Observ, Cape Town, South Africa

[5] Southern African Large Telescope Fdn, Karoo, South Africa

[6] N Copernicus Astron Ctr, Warsaw, Poland

来源：

OBSERVATORY | 2020年 / 140卷 / 1274期

基金：

新加坡国家研究基金会;

关键词：

STR LAMBDA-4077 STARS; CH STARS; ABUNDANCE; AP;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Barium stars are thought to result from binary evolution in systems wide enough to allow the more massive component to reach the asymptotic giant branch and eventually become a CO white dwarf. While Ba stars were initially known only among giant or subgiant stars, some were subsequently discovered also on the main sequence (and known as dwarf Ba stars). We provide here the orbital parameters of three dwarf Ba stars, completing the sample of 27 orbits published recently by Escorza et al. with these three southern targets. We show that these new orbital parameters are consistent with those of other dwarf Ba stars.

引用

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页码：11 / 20

页数：10

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