2008A&A...482..777C


C.D.S. - SIMBAD4 rel 1.7 - 2019.07.19CEST15:11:41

2008A&A...482..777C - Astronomy and Astrophysics, volume 482, 777-781 (2008/5-2)

Blue straggler stars in Galactic open clusters and the effect of field star contamination.

CARRARO G., VAZQUEZ R.A. and MOITINHO A.

Abstract (from CDS):

We investigate the distribution of blue straggler stars in the field of three open star clusters. The main purpose is to highlight the crucial role played by general Galactic disk fore-/back-ground field stars, which are often located in the same region of the color magnitude diagram as blue straggler stars. We analyze photometry taken from the literature of 3 open clusters of intermediate/old age rich in blue straggler stars, which are projected in the direction of the Perseus arm, and study their spatial distribution and the color magnitude diagram. As expected, we find that a large portion of the blue straggler population in these clusters are simply young field stars belonging to the spiral arm. This result has important consequences on the theories of the formation and statistics of blue straggler stars in different population environments: open clusters, globular clusters, or dwarf galaxies. As previously emphasized by many authors, a detailed membership analysis is mandatory before comparing the blue straggler population in star clusters to theoretical models. Moreover, these sequences of young field stars (blue plumes) are potentially powerful tracers of Galactic structure and they require further consideration.

Abstract Copyright:

Journal keyword(s): stars: blue stragglers - Galaxy: open clusters and associations: general - Galaxy: disk

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 LBN 117.62+02.29 HII 00 01 29 +64 39.0           ~ 35 0
2 Cl Berkeley 66 OpC 03 04 04 +58 44.4           ~ 49 0
3 NAME Per Arm PoG 03 30 +45.0           ~ 1177 0
4 Cl King 22 OpC 05 22 24 +45 24.3           ~ 47 0
5 Cl Berkeley 70 OpC 05 25 44.6 +41 53 45           ~ 24 0
6 C 0759-193 OpC 08 02 11 -19 27.9   10.05 9.1     ~ 27 0
7 NGC 2682 OpC 08 51 18 +11 48.0   7.6 6.9     ~ 1964 0
8 NGC 6717 GlC 18 55 06.04 -22 42 05.3   11.29 10.35     ~ 179 0
9 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 986 0
10 LBN 113.53-00.67 HII 23 32 57.9 +60 48 01           ~ 35 0
11 LBN 113.05-04.51 HII 23 38 23.70 +59 58 40.0           ~ 22 0
12 LBN 114.63-00.85 HII 23 40 11 +60 57.6           ~ 16 0
13 NGC 7789 OpC 23 57 24 +56 42.5   7.68 6.7     ~ 444 0
14 NAME Local Arm reg ~ ~           ~ 336 0
15 NAME Local Group GrG ~ ~           ~ 6587 0

    Equat.    Gal    SGal    Ecl

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2019.07.19-15:11:41

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