GALACTIC CLASSICAL CEPHEIDS: GAMMA VELOCITIES

GALACTIC CLASSICAL CEPHEIDS: GAMMA VELOCITIES

The γ velocities for 61 galactic classical Cepheids have been determined from recent homogeneous radial-velocity measurements combined with older published velocities. Our results confirm those of Caldwell and Coulson (1987), who used a largely different data set and an independent analysis. This ma...

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Veröffentlicht in:Publications of the Astronomical Society of the Pacific 1987-11, Vol.99 (621), p.1206-1208
Hauptverfasser: MOFFETT, THOMAS J., BARNES, THOMAS G.
Format: Artikel
Sprache:eng
Schlagworte:
Astronomy
Blue shift
Cepheids
Cepheids (delta cephei, w virginis)
Datasets
Earth, ocean, space
Exact sciences and technology
Orbital motion
Phase velocity
Radial velocity
Standard deviation
Stars
Variable and peculiar stars (including novae)
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Zusammenfassung:The γ velocities for 61 galactic classical Cepheids have been determined from recent homogeneous radial-velocity measurements combined with older published velocities. Our results confirm those of Caldwell and Coulson (1987), who used a largely different data set and an independent analysis. This makes it unlikely that the net blueshift of 3 ± 1 km s⁻¹ found by Caldwell and Coulson for galactic Cepheids is a result of approximations used in determining the γ velocities. The Cepheids Y Set and Z Lac are found to be binary star candidates.
ISSN:0004-6280
1538-3873
DOI:10.1086/132105