On the determination of absolute magnitude zero-points from Hipparcos parallaxes

Authors
Koen, C Laney, D
Citation
C. Koen et D. Laney, On the determination of absolute magnitude zero-points from Hipparcos parallaxes, M NOT R AST, 301(2), 1998, pp. 582-584
Citations number
10
Categorie Soggetti
Space Sciences
Journal title
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN journal
00358711 → ACNP
Volume
301
Issue
2
Year of publication
1998
Pages
582 - 584
Database
ISI
SICI code
0035-8711(199812)301:2<582:OTDOAM>2.0.ZU;2-T
Abstract
The period-luminosity (PL) relation zero-point determination from Hipparcos trigonometric parallaxes of Cepheids is contentious. It is shown that the method used by Feast & Catchpole is equivalent to a standard minimization o f sum of squares, and that it is free of Lutz-Kelker bias. The same techniq ue is applied to RR Lyrae and field HB star data, the PL relation being rep laced by a luminosity-metallicity relation.