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 inThe Astronomical journal Vol. 155; no. 6; pp. 252 - 256
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 Journal Article
LanguageEnglish
Published Madison The American Astronomical Society 01.06.2018
IOP Publishing
Subjects
astrometry
Astronomy
Asymptotic giant branch stars
Carbon stars
Galactic disk
Orbital elements
parallaxes
proper motions
stars: carbon
stars: distances
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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.
Bibliography:AAS10788
Stars and Stellar Physics
ISSN:0004-6256
1538-3881
DOI:10.3847/1538-3881/aac100