Multiplicity of disc-bearing stars in Upper Scorpius and Upper Centaurus-Lupus

Author:

Kuruwita Rajika L1,Ireland Michael1,Rizzuto Aaron2,Bento Joao1ORCID,Federrath Christoph1

Affiliation:

1. Research School of Astronomy and Astrophysics, Australian National University (ANU), Canberra, ACT 2611, Australia

2. Department of Astronomy, The University of Texas at Austin, Austin, TX 78712, USA

Abstract

ABSTRACT We present observations of disc-bearing stars in Upper Scorpius (US) and Upper Centaurus-Lupus (UCL) with moderate resolution spectroscopy in order to determine the influence of multiplicity on disc persistence after ${\sim }5\hbox{--}20\, \mathrm{Myr}$. Discs were identified using infrared (IR) excess from the Wide-field Infrared Survey Explorer (WISE) survey. Our survey consists of 55 US members and 28 UCL members, using spatial and kinematic information to assign a probability of membership. Spectra are gathered from the ANU 2.3 m telescope using the Wide Field Spectrograph (WiFeS) to detect radial velocity variations that indicate the presence of a companion. We identify two double-lined spectroscopic binaries, both of which have strong IR excess. We find the binary fraction of disc-bearing stars in US and UCL for periods up to 20 yr to be $0.06^{+0.07}_{-0.02}$ and $0.13^{+0.06}_{-0.03}$, respectively. Based on the multiplicity of field stars, we obtain an expected binary fraction of ${\sim }0.12^{+0.02}_{-0.01}$. The determined binary fractions for disc-bearing stars do not vary significantly from the field, suggesting that overall lifetime of discs may not differ between single and binary star systems.

Funder

Australian Research Council

Australian Research Council’s Discovery Projects

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 19 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. A Contact Binary Misclassified as an Ellipsoidal Variable: Complications for Detached Black Hole Searches;The Astronomical Journal;2024-07-01

2. Dynamical masses across the Hertzsprung–Russell diagram;Monthly Notices of the Royal Astronomical Society;2024-01-30

3. Revisiting the membership, multiplicity, and age of the Beta Pictoris Moving Group in the Gaia era;Monthly Notices of the Royal Astronomical Society;2024-01-04

4. Dust dynamics in planet-forming discs in binary systems;The European Physical Journal Plus;2023-01-16

5. A Census of the Low Accretors. I. The Catalog;The Astronomical Journal;2022-01-19

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3