2001A&A...370L..45A


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.27CET14:36:01

2001A&A...370L..45A - Astronomy and Astrophysics, volume 370, L45-48 (2001/5-2)

Structure in the velocity space of globular clusters.

ALFARO E.J., DELGADO A.J., GOMEZ-FLECHOSO M.A., FERRINI F. and CASTRO I.

Abstract (from CDS):

We present an analysis of the velocity space of a sample of globular clusters (GC) with absolute proper motions. The vertical component of the velocity is found to be correlated with luminosity and galactocentric radius. We divided the sample into two luminosity groups above and below the peak of the luminosity function (LF), MV=-7.5, for Galactic GCs. The two groups display different kinematic behaviour according to the first and second statitical moments of the velocity distribution as well as distinct velocity ellipsoids. The velocity ellipsoid of the high luminosity clusters is aligned with the symmetry axes of the Galaxy, whereas the minor axis of the Low Luminosity group is strongly inclined relative to the Galactic rotation axis.

Abstract Copyright:

Journal keyword(s): Galaxy: formation - Galaxy: globular clusters: general - Galaxy: halo - Galaxy: kinematics and dynamics - Galaxy: structure

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 291 1
2 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1037 0
3 SA 57- reg 13 08 38 +29 23.1           ~ 177 0
4 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3032 0
5 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 690 0
6 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 667 0
7 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1817 0

    Equat.    Gal    SGal    Ecl

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2020.10.27-14:36:01

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