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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Veröffentlicht in:The Astronomical journal 2018-06, Vol.155 (6), p.252
Hauptverfasser: 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.
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container_issue 6
container_start_page 252
container_title The Astronomical journal
container_volume 155
creator 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.
description 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.
doi_str_mv 10.3847/1538-3881/aac100
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subjects astrometry
Astronomy
Asymptotic giant branch stars
Carbon stars
Galactic disk
Orbital elements
parallaxes
proper motions
stars: carbon
stars: distances
title Distances of Dwarf Carbon Stars
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