2007ApJ...663..267L

Query : 2007ApJ...663..267L

2007ApJ...663..267L - Astrophys. J., 663, 267-276 (2007/July-1)

The blue straggler population of the globular cluster M5.

LANZONI B., DALESSANDRO E., FERRARO F.R., MANCINI C., BECCARI G., ROOD R.T., MAPELLI M. and SIGURDSSON S.

Abstract (from CDS):

By combining high-resolution HST and wide-field ground-based observations, in ultraviolet and optical bands, we study the blue straggler star (BSS) population of the galactic globular cluster M5 (NGC 5904) from its very central regions up to its periphery. The BSS distribution is highly peaked in the cluster center, decreases at intermediate radii and rises again outward. Such a bimodal distribution is similar to those previously observed in other globular clusters (M3, 47 Tucanae, NGC 6752). As for these clusters, dynamical simulations suggest that, while the majority of BSSs in M5 could be originated by stellar collisions, a significant fraction (20%-40%) of BSSs generated by mass transfer processes in primordial binaries is required to reproduce the observed radial distribution. A candidate BSS has been detected beyond the cluster tidal radius. If confirmed, this could represent an interesting case of an ``evaporating'' BSS.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: General - Stars: Blue Stragglers - Galaxy: Globular Clusters: Individual: Messier Number: M5 - Stars: Evolution

VizieR on-line data: <Available at CDS (J/ApJ/663/267): table1.dat>

Nomenclature: Table 1: Cl* NGC 5904 LDF NN (Nos 1-60).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
3 Cl* NGC 5904 DS V28 * 15 18 33.0 +02 04 37   15.44 15.11     ~ 5 0
4 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
5 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
6 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 913 0

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