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Search and analysis of blue straggler stars in open clusters

De Marchi, F. ; De Angeli, F. ; Piotto, G. ; Carraro, G. and Davies, Melvyn B LU (2006) In Astronomy & Astrophysics 459(2). p.489-497
Abstract
Aims. This paper presents a new homogeneous catalogue of blue straggler stars ( BSS) in Galactic open clusters. Methods. Photometric data for 216 clusters were collected from the literature and 2782 BSS candidates were extracted from 76 of them. Results. We found that the anticorrelation of BSS frequency vs. total magnitude identified in similar studies conducted on Galactic globular clusters extends to the open cluster regime: clusters with smaller total magnitude tend to have higher BSS frequencies. Moreover, a clear correlation between the BSS frequency ( obtained normalising the total number of BSS either to the total cluster mass or, for the older clusters, to the total number of clump stars) and the age of the clusters was found. A... (More)
Aims. This paper presents a new homogeneous catalogue of blue straggler stars ( BSS) in Galactic open clusters. Methods. Photometric data for 216 clusters were collected from the literature and 2782 BSS candidates were extracted from 76 of them. Results. We found that the anticorrelation of BSS frequency vs. total magnitude identified in similar studies conducted on Galactic globular clusters extends to the open cluster regime: clusters with smaller total magnitude tend to have higher BSS frequencies. Moreover, a clear correlation between the BSS frequency ( obtained normalising the total number of BSS either to the total cluster mass or, for the older clusters, to the total number of clump stars) and the age of the clusters was found. A simple model is developed here to try to explain this last and new result. The model allows us to ascertain the important effect played by mass loss in the evolution of open clusters. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
galaxy : open clusters and associations : general stars :, general, catalogs, galaxy : globular clusters :, stars : blue stragglers, Hertzsprung-Russell (HR) and C-M diagrams
in
Astronomy & Astrophysics
volume
459
issue
2
pages
489 - 497
publisher
EDP Sciences
external identifiers
  • wos:000241822800017
  • scopus:33750989643
ISSN
0004-6361
DOI
10.1051/0004-6361:20064898
language
English
LU publication?
yes
id
1ad337b4-4344-49b0-bb1d-4feb56fd3f5f (old id 378530)
date added to LUP
2016-04-01 15:35:52
date last changed
2020-11-22 05:19:51
@article{1ad337b4-4344-49b0-bb1d-4feb56fd3f5f,
  abstract     = {Aims. This paper presents a new homogeneous catalogue of blue straggler stars ( BSS) in Galactic open clusters. Methods. Photometric data for 216 clusters were collected from the literature and 2782 BSS candidates were extracted from 76 of them. Results. We found that the anticorrelation of BSS frequency vs. total magnitude identified in similar studies conducted on Galactic globular clusters extends to the open cluster regime: clusters with smaller total magnitude tend to have higher BSS frequencies. Moreover, a clear correlation between the BSS frequency ( obtained normalising the total number of BSS either to the total cluster mass or, for the older clusters, to the total number of clump stars) and the age of the clusters was found. A simple model is developed here to try to explain this last and new result. The model allows us to ascertain the important effect played by mass loss in the evolution of open clusters.},
  author       = {De Marchi, F. and De Angeli, F. and Piotto, G. and Carraro, G. and Davies, Melvyn B},
  issn         = {0004-6361},
  language     = {eng},
  number       = {2},
  pages        = {489--497},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {Search and analysis of blue straggler stars in open clusters},
  url          = {http://dx.doi.org/10.1051/0004-6361:20064898},
  doi          = {10.1051/0004-6361:20064898},
  volume       = {459},
  year         = {2006},
}