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Red giant depletion in globular cluster cores

Beer, Martin E and Davies, Melvyn B LU (2004) In Monthly Notices of the Royal Astronomical Society 348(2). p.679-686
Abstract
We investigate the observed depletion of red giants in the cores ofpost-core-collapse globular clusters. In particular, the evolutionaryscenario we consider is a binary consisting of two low-mass stars whichundergoes two common-envelope phases. The first common-envelope phaseoccurs when the primary is a red giant resulting in a helium white dwarfand main-sequence star in a detached binary. The second common-envelopephase occurs shortly after the secondary becomes a red giant. During thesecond common-envelope phase, the degenerate helium cores mergeresulting in a core mass greater than the helium burning limit and theformation of a horizontal branch star. We show that stellar encountersenhance this evolutionary route in post-core-collapse... (More)
We investigate the observed depletion of red giants in the cores ofpost-core-collapse globular clusters. In particular, the evolutionaryscenario we consider is a binary consisting of two low-mass stars whichundergoes two common-envelope phases. The first common-envelope phaseoccurs when the primary is a red giant resulting in a helium white dwarfand main-sequence star in a detached binary. The second common-envelopephase occurs shortly after the secondary becomes a red giant. During thesecond common-envelope phase, the degenerate helium cores mergeresulting in a core mass greater than the helium burning limit and theformation of a horizontal branch star. We show that stellar encountersenhance this evolutionary route in post-core-collapse clusters. Theseencounters increase the population of binary secondaries which wouldhave evolved on to the red giant branch in the recent past. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
binaries: close, stars: evolution, globular clusters: general, stars: general
in
Monthly Notices of the Royal Astronomical Society
volume
348
issue
2
pages
679 - 686
publisher
Wiley-Blackwell
external identifiers
  • scopus:1442335248
ISSN
1365-2966
DOI
10.1111/j.1365-2966.2004.07380.x
language
English
LU publication?
yes
id
8dd7c3e4-6567-4edc-99a0-3e35fd1e567a (old id 129622)
date added to LUP
2007-07-12 14:00:11
date last changed
2017-01-01 04:51:18
@article{8dd7c3e4-6567-4edc-99a0-3e35fd1e567a,
  abstract     = {We investigate the observed depletion of red giants in the cores ofpost-core-collapse globular clusters. In particular, the evolutionaryscenario we consider is a binary consisting of two low-mass stars whichundergoes two common-envelope phases. The first common-envelope phaseoccurs when the primary is a red giant resulting in a helium white dwarfand main-sequence star in a detached binary. The second common-envelopephase occurs shortly after the secondary becomes a red giant. During thesecond common-envelope phase, the degenerate helium cores mergeresulting in a core mass greater than the helium burning limit and theformation of a horizontal branch star. We show that stellar encountersenhance this evolutionary route in post-core-collapse clusters. Theseencounters increase the population of binary secondaries which wouldhave evolved on to the red giant branch in the recent past.},
  author       = {Beer, Martin E and Davies, Melvyn B},
  issn         = {1365-2966},
  keyword      = {binaries: close,stars: evolution,globular clusters: general,stars: general},
  language     = {eng},
  number       = {2},
  pages        = {679--686},
  publisher    = {Wiley-Blackwell},
  series       = {Monthly Notices of the Royal Astronomical Society},
  title        = {Red giant depletion in globular cluster cores},
  url          = {http://dx.doi.org/10.1111/j.1365-2966.2004.07380.x},
  volume       = {348},
  year         = {2004},
}