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MOCCA-SURVEY database I. Accreting white dwarf binary systems in globular clusters - III. Cataclysmic variables - implications of model assumptions

Belloni, D. ; Zorotovic, M. ; Schreiber, Matthias R. ; Leigh, Nathan W. C. ; Giersz, M. and Askar, A. LU (2017) In Monthly Notices of the Royal Astronomical Society 468. p.2429-2446
Abstract
In this third of a series of papers related to cataclysmic variables (CVs) and related objects, we analyse the population of CVs in a set of 12 globular cluster models evolved with the MOCCA Monte Carlo code, for two initial binary populations (IBPs), two choices of common-envelope phase (CEP) parameters, and three different models for the evolution of CVs and the treatment of angular momentum loss. When more realistic models and parameters are considered, we find that present-day cluster CV duty cycles are extremely low (≲0.1 per cent) that makes their detection during outbursts rather difficult. Additionally, the IBP plays a significant role in shaping the CV population properties, and models that follow the Kroupa IBP are less affected... (More)
In this third of a series of papers related to cataclysmic variables (CVs) and related objects, we analyse the population of CVs in a set of 12 globular cluster models evolved with the MOCCA Monte Carlo code, for two initial binary populations (IBPs), two choices of common-envelope phase (CEP) parameters, and three different models for the evolution of CVs and the treatment of angular momentum loss. When more realistic models and parameters are considered, we find that present-day cluster CV duty cycles are extremely low (≲0.1 per cent) that makes their detection during outbursts rather difficult. Additionally, the IBP plays a significant role in shaping the CV population properties, and models that follow the Kroupa IBP are less affected by enhanced angular momentum loss. We also predict from our simulations that CVs formed dynamically in the past few Gyr (massive CVs) correspond to bright CVs (as expected) and that faint CVs formed several Gyr ago (dynamically or not) represent the overwhelming majority. Regarding the CV formation rate, we rule out the notion that it is similar irrespective of the cluster properties. Finally, we discuss the differences in the present-day CV properties related to the IBPs, the initial cluster conditions, the CEP parameters, formation channels, the CV evolution models and the angular momentum loss treatments. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
methods: numerical, novae, cataclysmic variables, globular clusters: general
in
Monthly Notices of the Royal Astronomical Society
volume
468
pages
18 pages
publisher
Oxford University Press
ISSN
1365-2966
DOI
10.1093/mnras/stx575
language
Unknown
LU publication?
no
id
436656d7-67d4-4c15-adc7-fd37864c816f
date added to LUP
2018-10-30 17:58:06
date last changed
2019-07-05 11:23:59
@article{436656d7-67d4-4c15-adc7-fd37864c816f,
  abstract     = {In this third of a series of papers related to cataclysmic variables (CVs) and related objects, we analyse the population of CVs in a set of 12 globular cluster models evolved with the MOCCA Monte Carlo code, for two initial binary populations (IBPs), two choices of common-envelope phase (CEP) parameters, and three different models for the evolution of CVs and the treatment of angular momentum loss. When more realistic models and parameters are considered, we find that present-day cluster CV duty cycles are extremely low (≲0.1 per cent) that makes their detection during outbursts rather difficult. Additionally, the IBP plays a significant role in shaping the CV population properties, and models that follow the Kroupa IBP are less affected by enhanced angular momentum loss. We also predict from our simulations that CVs formed dynamically in the past few Gyr (massive CVs) correspond to bright CVs (as expected) and that faint CVs formed several Gyr ago (dynamically or not) represent the overwhelming majority. Regarding the CV formation rate, we rule out the notion that it is similar irrespective of the cluster properties. Finally, we discuss the differences in the present-day CV properties related to the IBPs, the initial cluster conditions, the CEP parameters, formation channels, the CV evolution models and the angular momentum loss treatments.},
  author       = {Belloni, D. and Zorotovic, M. and Schreiber, Matthias R. and Leigh, Nathan W. C. and Giersz, M. and Askar, A.},
  issn         = {1365-2966},
  language     = {und},
  month        = {06},
  pages        = {2429--2446},
  publisher    = {Oxford University Press},
  series       = {Monthly Notices of the Royal Astronomical Society},
  title        = {MOCCA-SURVEY database I. Accreting white dwarf binary systems in globular clusters - III. Cataclysmic variables - implications of model assumptions},
  url          = {http://dx.doi.org/10.1093/mnras/stx575},
  doi          = {10.1093/mnras/stx575},
  volume       = {468},
  year         = {2017},
}