THE CEPHEID PERIOD-LUMINOSITY ZERO-POINT FROM RADIAL-VELOCITIES AND HIPPARCOS PROPER MOTIONS

Authors
FEAST M PONT F WHITELOCK P
Citation
M. Feast et al., THE CEPHEID PERIOD-LUMINOSITY ZERO-POINT FROM RADIAL-VELOCITIES AND HIPPARCOS PROPER MOTIONS, Monthly Notices of the Royal Astronomical Society, 298(2), 1998, pp. 43-44
Citations number
9
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Monthly Notices of the Royal Astronomical Society → ACNP
ISSN journal
00358711
Volume
298
Issue
2
Year of publication
1998
Pages
43 - 44
Database
ISI
SICI code
0035-8711(1998)298:2<43:TCPZFR>2.0.ZU;2-3
Abstract
A value for the zero-point (rho) of the Cepheid period-luminosity rela tion, < M-V > = -2.81 log P + rho, is deduced by comparing the value o f the Oort constant, A, derived from radial velocities with that deriv ed from Hipparcos proper motions. We find in this way that rho = -1.47 +/- 0.13, in excellent agreement with the value derived from Hipparco s trigonometrical parallaxes, rho = -1.43 +/- 0.10, by Feast & Catchpo le in a recent paper.