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From supergiant stars to galaxies: The path to extragalactic distances

Published online by Cambridge University Press:  26 February 2013

Fabio Bresolin  and
Rolf-Peter Kudritzki
Fabio Bresolin
Affiliation:
Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, 96822 Honolulu, HI, USA email: [email protected], [email protected]
Rolf-Peter Kudritzki
Affiliation:
Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, 96822 Honolulu, HI, USA email: [email protected], [email protected]
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Abstract

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The spectroscopic study of blue supergiants in nearby galaxies can yield crucial information about the spatial distribution of extinction by dust, and can be successfully used to measure the metal content, abundance patterns, and distances of galaxies out to ~8 Mpc with current telescopes and instrumentation. We briefly review the results of an ongoing project in which the quantitative analysis of B- and A-type supergiants is used to independently test widely used metallicity diagnostics for star-forming galaxies and derive reddening-free extragalactic distances.

Keywords

galaxies: distances and redshiftsstars: early-typestars: abundancessupergiantsHii regionsgalaxies: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S289: Advancing the Physics of Cosmic Distances , August 2012 , pp. 203 - 208
Copyright
Copyright © International Astronomical Union 2013

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