Distances of Dwarf Carbon Stars

Parallaxes are presented for a sample of 20 nearby dwarf carbon stars. The inferred luminosities cover almost two orders of magnitude. Their absolute magnitudes and tangential velocities confirm prior expectations that some originate in the Galactic disk, although more than half of this sample are h...

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Bibliographic Details
Published in:arXiv.org 2018-04
Main Authors: Harris, Hugh C, Dahn, Conard C, Subasavage, John P, Munn, Jeffrey A, Canzian, Blaise J, Levine, Stephen E, Monet, Alice B, Pier, Jeffrey R, Stone, Ronald C, Tilleman, Trudy M, Hartkopf, William I
Format: Article
Language:English
Subjects:
Asymptotic giant branch stars
Binary stars
Carbon stars
Dwarf stars
Galactic disk
Orbital elements
Online Access:Get full text
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Summary:Parallaxes are presented for a sample of 20 nearby dwarf carbon stars. The inferred luminosities cover almost two orders of magnitude. Their absolute magnitudes and tangential velocities confirm prior expectations that some originate in the Galactic disk, although more than half of this sample are halo stars. Three stars are found to be astrometric binaries, and orbital elements are determined; their semimajor axes are 1 -- 3 AU, consistent with the size of an AGB mass-transfer donor star.
ISSN:2331-8422
DOI:10.48550/arxiv.1804.09824