Status Report

Current Uncertainties in the Use of Cepheids as Distance Indicators

By SpaceRef Editor
January 7, 2003
Filed under , ,

Astrophysics, abstract
astro-ph/0301100


From: Michael Feast <[email protected]>
Date: Tue, 7 Jan 2003 07:31:27 GMT (37kb)

Current Uncertainties in the Use of Cepheids as Distance Indicators


Author:
Michael Feast (University of Cape Town)

Comments: 26 pages, no figs, to appear in “Stellar Candles for the
Extragalactic Distance Scale” Lecture Notes in Physics (Springer) ed. D.
Alloin and W. Gieren


The methods of calibrating the luminosities of galactic Cepheids and
determining Cepheid reddenings are considered in some detail. Together with
work on NGC4258 this suggests that the calibration presented is valid to about
0.1mag (s.e.) at least for Cepheids with near-solar abundances. Metallicity
effects are considered, partly through the use of non-Cepheid moduli of the
LMC. To reduce the uncertainty substantially below 0.1mag will require
extensive work on metallicity effects. Non-linearities in the period-luminosity
and period-colour relations will also need to be considered as will the need to
distinguish unambiguously between fundamental and overtone pulsators.

Full-text: PostScript, PDF, or Other formats



References and citations for this submission:

SLAC-SPIRES HEP (refers to ,
cited by, arXiv reformatted)



Links to:
arXiv,
astro-ph,
/find,
/abs (/+), /0301,
?



SpaceRef staff editor.