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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz


IMPACT FACTOR 2018: 0.350

CiteScore 2018: 0.24

SCImago Journal Rank (SJR) 2018: 0.202
Source Normalized Impact per Paper (SNIP) 2018: 0.144

ICV 2017: 121.03

Open Access
Online
ISSN
2543-6376
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Volume 21, Issue 1-2

Issues

Mass Transfer in Mira-Type Binaries

S. Mohamed
  • Corresponding author
  • Argelander Institut für Astronomie, Auf dem Hügel 71, Bonn D-53121, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Ph. Podsiadlowski
  • Argelander Institut für Astronomie, Auf dem Hügel 71, Bonn D-53121, Germany United Kingdom of Great Britain and Northern Ireland
  • Department of Physics, University of Oxford, Oxford, OX1 3RH, United Kingdom of Great Britain and Northern Ireland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-03-23 | DOI: https://doi.org/10.1515/astro-2017-0362

Abstract

Detached, symbiotic binaries are generally assumed to interact via Bondi-Hoyle-Littleton (BHL) wind accretion. However, the accretion rates and outflow geometries that result from this mass-transfer mechanism cannot adequately explain the observations of the nearest and best studied symbiotic binary, Mira, or the formation of some post-AGB binaries, e.g. barium stars. We propose a new mass-transfer mode for Mira-type binaries, which we call ‘wind Roche-lobe overflow’ (WRLOF), and which we demonstrate with 3D hydrodynamic simulations. Importantly, we show that the circumstellar outflows which result from WRLOF tend to be highly aspherical and strongly focused towards the binary orbital plane. Furthermore, the subsequent mass-transfer rates are at least an order of magnitude greater than the analogous BHL values. We discuss the implications of these results for the shaping of bipolar (proto)-planetary nebulae and other related systems.

Keywords: stars; binaries; symbiotic; accretion; accretion disks; hydrodynamics; stars; mass loss; winds; outflows

References

About the article

Received: 2011-09-02

Accepted: 2011-09-15

Published Online: 2017-03-23

Published in Print: 2012-06-01


Citation Information: Open Astronomy, Volume 21, Issue 1-2, Pages 88–96, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0362.

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© 2017. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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