2011AJ....141....5F


Query : 2011AJ....141....5F

2011AJ....141....5F - Astron. J., 141, 5 (2011/January-0)

White dwarfs in local star streams.

FUCHS B. and DETTBARN C.

Abstract (from CDS):

We have studied the fine structure of the phase space distribution of white dwarfs in the solar neighborhood. White dwarfs have kinematics that are typical for the stellar population of the old thin disk of the Milky Way. Using a projection of the space velocities of stars onto vertical angular momentum components and eccentricities of the stellar orbits we demonstrate that stellar streams can be identified in the phase space distribution of the white dwarfs. These correspond to the well-known Sirius, Pleiades, and Hercules star streams. Membership of white dwarfs, which represent the oldest population in the Galaxy, in these streams lends support to the interpretation that the streams owe their existence to dynamical resonance effects of the stars with Galactic spiral arms or the Galactic bar, because these indiscriminately affect all stellar populations.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: kinematics and dynamics - solar neighborhood

Simbad objects: 10

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Number of rows : 10
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 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
2 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 467 1
3 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
4 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
5 NAME Galactic Bar reg ~ ~           ~ 1458 0
6 NAME Pleiades Moving Group MGr ~ ~           ~ 297 0
7 NAME Hyades Moving Group MGr ~ ~           ~ 300 0
8 NAME Coma Berenices Moving Group MGr ~ ~           ~ 103 0
9 NAME Hercules Stream MGr ~ ~           ~ 264 0
10 NAME Arcturus Stream MGr ~ ~           ~ 83 1

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