High-resolution simulations of stellar collisions between equal-mass main-sequence stars in globular clusters
(2002) In Monthly Notices of the Royal Astronomical Society 332. p.49-54- Abstract
- We performed high-resolution simulations of two stellar collisions relevant for stars in globular clusters. We considered one head-on collision and one off-axis collision between two 0.6-Msolar main-sequence stars. We show that a resolution of about 100000 particles is sufficient for most studies of the structure and evolution of blue stragglers. We demonstrate conclusively that collision products between main-sequence stars in globular clusters do not have surface convection zones larger than 0.004Msolar after the collision, nor do they develop convection zones during the `pre-main-sequence' thermal relaxation phase of their post-collision evolution. Therefore, any mechanism which requires a surface convection zone (i.e. chemical mixing... (More)
- We performed high-resolution simulations of two stellar collisions relevant for stars in globular clusters. We considered one head-on collision and one off-axis collision between two 0.6-Msolar main-sequence stars. We show that a resolution of about 100000 particles is sufficient for most studies of the structure and evolution of blue stragglers. We demonstrate conclusively that collision products between main-sequence stars in globular clusters do not have surface convection zones larger than 0.004Msolar after the collision, nor do they develop convection zones during the `pre-main-sequence' thermal relaxation phase of their post-collision evolution. Therefore, any mechanism which requires a surface convection zone (i.e. chemical mixing or angular momentum loss via a magnetic wind) cannot operate in these stars. We show that no disc of material surrounding the collision product is produced in off-axis collisions. The lack of both a convection zone and a disc proves a continuing problem for the angular momentum evolution of blue stragglers in globular clusters. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/760882
- author
- Sills, A. ; Adams, T. ; Davies, Melvyn B LU and Bate, M.R.
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- blue stragglers, hydrodynamics, convection, globular clusters: general, stars: rotation
- in
- Monthly Notices of the Royal Astronomical Society
- volume
- 332
- pages
- 49 - 54
- publisher
- Oxford University Press
- external identifiers
-
- scopus:0041591555
- ISSN
- 1365-2966
- language
- English
- LU publication?
- no
- id
- 7f0aa7a7-0f6f-4e4f-a325-e7579800c017 (old id 760882)
- alternative location
- http://cdsads.u-strasbg.fr/abs/2002MNRAS.332...49S
- date added to LUP
- 2016-04-04 11:18:25
- date last changed
- 2022-03-23 17:21:58
@article{7f0aa7a7-0f6f-4e4f-a325-e7579800c017,
abstract = {{We performed high-resolution simulations of two stellar collisions relevant for stars in globular clusters. We considered one head-on collision and one off-axis collision between two 0.6-Msolar main-sequence stars. We show that a resolution of about 100000 particles is sufficient for most studies of the structure and evolution of blue stragglers. We demonstrate conclusively that collision products between main-sequence stars in globular clusters do not have surface convection zones larger than 0.004Msolar after the collision, nor do they develop convection zones during the `pre-main-sequence' thermal relaxation phase of their post-collision evolution. Therefore, any mechanism which requires a surface convection zone (i.e. chemical mixing or angular momentum loss via a magnetic wind) cannot operate in these stars. We show that no disc of material surrounding the collision product is produced in off-axis collisions. The lack of both a convection zone and a disc proves a continuing problem for the angular momentum evolution of blue stragglers in globular clusters.}},
author = {{Sills, A. and Adams, T. and Davies, Melvyn B and Bate, M.R.}},
issn = {{1365-2966}},
keywords = {{blue stragglers; hydrodynamics; convection; globular clusters: general; stars: rotation}},
language = {{eng}},
pages = {{49--54}},
publisher = {{Oxford University Press}},
series = {{Monthly Notices of the Royal Astronomical Society}},
title = {{High-resolution simulations of stellar collisions between equal-mass main-sequence stars in globular clusters}},
url = {{http://cdsads.u-strasbg.fr/abs/2002MNRAS.332...49S}},
volume = {{332}},
year = {{2002}},
}