Fast nodal precession of the disc around Pleione requires a broken disc

Author:

Martin Rebecca G12ORCID,Lepp Stephen12ORCID

Affiliation:

1. Nevada Center for Astrophysics, University of Nevada, Las Vegas , 4505 South Maryland Parkway, Las Vegas, NV 89154, USA

2. Department of Physics and Astronomy, University of Nevada, Las Vegas , 4505 South Maryland Parkway, Las Vegas, NV 89154, USA

Abstract

ABSTRACT Pleione is a Be star that is in a 218-d orbit with a low-mass binary companion. Recent numerical simulations have shown that a Be star disc can be subject to breaking when material is actively being fed into the inner parts of the disc. After breaking, the disc is composed of two rings: an inner ring that is anchored to the stellar equator and an outer ring that is free to nodally precess. A double ring disc may explain some of the observed variability in Pleione. We model the nodal precession of the outer disc ring that is driven by the companion on an observed time-scale of $80.5\, \rm yr$. We find that the outer ring of a broken disc in a binary with an eccentricity of eb = 0.6 can precess on the observed time-scale and have an outer radius that is in rough agreement with the observed disc size. An unbroken disc model cannot fit both the observed precession rate and disc size. Suppression of Kozai–Lidov driven disc eccentricity is more likely for a high binary eccentricity if the disc extends to the tidal truncation radius.

Funder

NASA

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 4 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. Disc tearing in a Be star: predicted 3D observations;Monthly Notices of the Royal Astronomical Society;2023-11-27

2. The historical active episodes of the disks around γ Cassiopeiae (B0.5 IVe) and 59 Cygni (B1 IVe) revisited;Astronomy & Astrophysics;2023-10

3. Non-LTE Monte Carlo radiative transfer – III. The thermal properties of tilted and warped Be star discs;Monthly Notices of the Royal Astronomical Society;2023-09-12

4. Superorbital periods of Be/X-ray binaries driven by stellar spin precession;Monthly Notices of the Royal Astronomical Society: Letters;2023-04-27

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