WHITE DWARFS IN LOCAL STAR STREAMS

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/141/1/5· OSTI ID:21443124

Fuchs, Burkhard; Dettbarn, Christian ^[1]

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1. Astronomisches Rechen-Institut, Zentrum fuer Astronomie der Universitaet Heidelberg, 69120 Heidelberg (Germany)

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.

• OSTI ID: 21443124
• Journal Information: Astronomical Journal (New York, N.Y. Online), Journal Name: Astronomical Journal (New York, N.Y. Online) Journal Issue: 1 Vol. 141; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ANGULAR MOMENTUM
DWARF STARS
GALAXIES
MATHEMATICAL SPACE
MILKY WAY
ORBITS
PHASE SPACE
SPACE
STARS
WHITE DWARF STARS