R. -P. Kudritzki, M. A. Urbaneja, Z. Gazak, F. Bresolin, N. Przybilla, W. Gieren, G. Pietrzynski
Abridged) The analysis of blue supergiants in the giant spiral M81 is used to
determine effective temperatures, gravities, metallicities, luminosites,
interstellar reddening and a new distance using the FGLR. Substantial
extinction is found with E(B-V) ranging between 0.13 to 0.38 mag and an average
value of 0.26 mag. The distance modulus obtained after individual reddening
corrections is 27.7 mag. We find a shallow metallicity gradient of -0.034
dex/kpc. A mass metallicity relationship for nearby galaxies based on stellar
spectroscopy is presented and compared with recent SDSS studies.
View original:
http://arxiv.org/abs/1112.3643
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