2019MNRAS.483.1523S

Query : 2019MNRAS.483.1523S

2019MNRAS.483.1523S - Mon. Not. R. Astron. Soc., 483, 1523-1536 (2019/February-3)

Investigating the blue straggler stars radial distribution in globular clusters with Monte Carlo simulations.

SOLLIMA A. and FERRARO F.R.

Abstract (from CDS):

We investigate the evolution of the radial distribution of blue straggler stars through a set of Monte Carlo simulations of star clusters under a variety of initial conditions. We used a novel technique based on the 'artificial oversampling' of the distribution function of the blue stragglers and control population to tear down the effect of statistical fluctuations affecting the determination of the relative distribution of these stellar populations. We find that a bimodal distribution, qualitatively similar but much less pronounced than those observed in many globular clusters, can naturally emerge as a result of the progressive migration of blue stragglers in the energy domain. The behaviour of the parameter A+, proposed as a 'dynamical age' indicator, has been also investigated. This parameter shows a relatively homogeneous and well-defined trend with the fraction of the elapsed core-collapse time-scale up to the core-collapse phase, while after this stage its evolution depends on initial conditions.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: numerical - methods: statistical - blue stragglers - stars: kinematics and dynamics - globular clusters: general

Simbad objects: 1

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Number of rows : 1
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 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0

Query : 2019MNRAS.483.1523S

Basic data :
NGC 6397 -- Globular Cluster
Other object types: otypes_help 		GlC (2013A&A,GCl), Cl* (C,[KPS2012])
ICRS coord. (ep=J2000) : 		17 40 42.09 -53 40 27.6 (Optical) [ ] D 2010AJ....140.1830G
FK4 coord. (ep=B1950 eq=1950) : 		17 36 37.84 -53 38 53.5 [ ]
Gal coord. (ep=J2000) : 		338.16501 -11.95952 [ ]
Proper motions mas/yr : 		3.30 -17.60 [0.01 0.01 90] C 2019MNRAS.482.5138B
Radial velocity / Redshift / cz : 		V(km/s) 18.4 [0.1] / z(spectroscopic) 0.000061 [0.000000] / cz 18.40 [0.10]
   (Opt) A 2018MNRAS.478.1520B
Parallaxes (mas): 		0.416 [0.010] C 2021MNRAS.505.5978V
Angular size (arcmin): 		25.7 25.7 90 (Opt) D 1989Sci...246.1066D
Fluxes (3) :
V 5.17 [~] D 2012AJ....144..126D
K 3.29 [~] D 2008MNRAS.389.1924F
z (AB) 5.450 [0.044] C 2014MNRAS.437.1725V
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Hierarchy : number of linked objects
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: 1592 		Display criteria :

Identifiers (4) :
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NGC 6397 C 1736-536 GCl 74 [KPS2012] MWSC 2662

References (2103 between 1850 and 2026) (Total 2103)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 3    Distance : 3    Fe/H : 9    Plx : 2    PM : 3   

   

Observing logs
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NGC 6397

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