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Picture of Abbas Askar

Abbas Askar

Postdoc

Picture of Abbas Askar

Are most Cataclysmic Variables in Globular Clusters dynamically formed

Author

  • Diogo Belloni
  • Mirek Giersz
  • Liliana E.Rivera Sandoval
  • Abbas Askar
  • Pawel Ciecielag

Summary, in English

We have been investigating populations of cataclysmic variables (CVs) in a set of more than 300 globular cluster (GC) models evolved with themoccacode.[-120pt] One of the main questions we have intended to answer is whether most CVs in GCs are dynamically formed or not. Contrary to what has been argued for a long time, we found that dynamical destruction of primordial CV progenitors is much stronger in GCs than dynamical formation of CVs. In particular, we found that, on average, the detectable CV population is predominantly composed of CVs formed via a typical common envelope phase (â 70 per cent). However, core-collapsed models tend to have higher fractions of bright CVs than non-core-collapsed ones, which suggests then that the formation of CVs is indeed slightly favoured through strong dynamical interactions in core-collapsed GCs, due to the high stellar densities in their cores.

Department/s

  • Lund Observatory

Publishing year

2019

Language

English

Pages

404-407

Publication/Series

Proceedings of the International Astronomical Union

Volume

14

Issue

351

Document type

Journal article

Publisher

Cambridge University Press

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • binaries: general
  • cataclysmic variables
  • globular clusters: general
  • methods: numerical
  • novae

Status

Published

ISBN/ISSN/Other

  • ISSN: 1743-9213