Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 464, Issue 4, Pages 4077-4095Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw2516
Keywords
methods: numerical; novae, cataclysmic variables; globular clusters: general
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Funding
- CAPES foundation, Brazilian Ministry of Education [BEX 13514/13-0]
- National Science Centre [DEC-2012/07/B/ST9/04412, UMO-2015/17/N/ST9/02573]
- Nicolaus Copernicus Astronomical Centre
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This is the second in a series of papers associated with cataclysmic variables (CVs) and related objects, formed in a suite of simulations for globular cluster evolution performed with the MOCCA Monte Carlo code. We study the properties of our simulated CV populations throughout the entire cluster evolution. We find that dynamics extends the range of binary CV progenitor properties, causing CV formation from binary progenitors that would otherwise not become CVs. The CV formation rate in our simulations can be separated into two regimes: an initial burst (less than or similar to 1Gyr) connected with the formation of the most massive white dwarfs, followed by a nearly constant formation rate. This result holds for all models regardless of the adopted initial conditions, even when most CVs form dynamically. Given the cluster age-dependence of CV properties, we argue that direct comparisons to observed Galactic field CVs could be misleading, since cluster CVs can be up to four times older than their field counterparts. Our results also illustrate that, due mainly to unstable mass transfer, some CVs that form in our simulations are destroyed before the present day. Finally, some field CVs might have originated from globular clusters, as found in our simulations, although the fraction of such escapers should be small relative to the entire Galactic field CV population.
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