EDP Sciences
Free access
Issue
A&A
Volume 373, Number 1, July I 2001
Page(s) 122 - 125
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20010666


A&A 373, 122-125 (2001)
DOI: 10.1051/0004-6361:20010666

Rotation and the wind momentum-luminosity relation for extragalactic distances

A. Maeder

Geneva Observatory, 1290 Sauverny, Switzerland

(Received 12 February 2001 / Accepted 27 April 2001)

Abstract
The effects of axial stellar rotation on the wind-momentum relation (WLR) for determining the extragalactic distances are investigated. Despite the fact that the mass loss rates grow quite a lot with rotation, remarkably the effects on the WLR are found to be very small on average. As an example, for an average orientation angle between the rotation axis and the line of sight, the luminosity would be overestimated by 5.9% for a star rotating at 90% of its break-up rotational velocity. Different orientation angles between the rotation axis and the line of sight produce some limited scatter.


Key words: stars: distances -- stars: mass loss -- stars: variables: general -- stars: winds and outflows -- galaxies: distances and redshifts




© ESO 2001