Properties of Cataclysmic Variables in Globular Clusters. (arXiv:2008.12772v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Belloni_D/0/1/0/all/0/1">Diogo Belloni</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sandoval_L/0/1/0/all/0/1">Liliana E. Rivera Sandoval</a>
The study of star clusters plays an important role in our understanding of
the Universe since these systems are natural laboratories for testing theories
of stellar dynamics and evolution. Particularly, globular clusters (GCs) are
one of the most important objects for studying the formation and the physical
nature of exotic systems which in turn provide basic information and tools that
can help us to understand the formation and evolution processes of star
clusters themselves, galaxies and, in general, the young Universe. Among the
most interesting objects in GCs are the cataclysmic variables (CVs), which are
interacting binaries harboring a white dwarf accreting from a low-mass
companion. Since GC densities are sufficiently high that dynamical encounters
involving binaries should be common, CV progenitors are expected to be affected
by dynamics in some way in the early stages. In this article we review the
formation channels and the influence of dynamics on the CV population in GCs.
In particular, we review recent progress in numerical simulations. Furthermore,
we discuss observational properties of CVs in GCs and the techniques used to
identify and study them. We focus the discussion on the multi-wavelength
observations carried out with HST and Chandra on the best-studied GCs NGC 6397,
NGC 6752, 47 Tucanae and Omega Centauri; on the recent spectroscopic findings
with MUSE, and on updates regarding the correlation between the number of faint
X-ray sources and the cluster stellar encounter rate. Finally, we discuss some
observational prospects that might potentially help future investigations.
The study of star clusters plays an important role in our understanding of
the Universe since these systems are natural laboratories for testing theories
of stellar dynamics and evolution. Particularly, globular clusters (GCs) are
one of the most important objects for studying the formation and the physical
nature of exotic systems which in turn provide basic information and tools that
can help us to understand the formation and evolution processes of star
clusters themselves, galaxies and, in general, the young Universe. Among the
most interesting objects in GCs are the cataclysmic variables (CVs), which are
interacting binaries harboring a white dwarf accreting from a low-mass
companion. Since GC densities are sufficiently high that dynamical encounters
involving binaries should be common, CV progenitors are expected to be affected
by dynamics in some way in the early stages. In this article we review the
formation channels and the influence of dynamics on the CV population in GCs.
In particular, we review recent progress in numerical simulations. Furthermore,
we discuss observational properties of CVs in GCs and the techniques used to
identify and study them. We focus the discussion on the multi-wavelength
observations carried out with HST and Chandra on the best-studied GCs NGC 6397,
NGC 6752, 47 Tucanae and Omega Centauri; on the recent spectroscopic findings
with MUSE, and on updates regarding the correlation between the number of faint
X-ray sources and the cluster stellar encounter rate. Finally, we discuss some
observational prospects that might potentially help future investigations.
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