%0 Journal Article
%T Red Supergiants as Cosmic Abundance Probes: The Sculptor Galaxy NGC 300
%+ University of Hawai'i [Honolulu] (UH)
%+ Laboratoire Univers et Particules de Montpellier (LUPM)
%A Gazak, J. Zachary
%A Kudritzki, Rolf
%A Evans, Chris
%A Patrick, Lee
%A Davies, Ben
%A Bergemann, Maria
%A Plez, Bertrand
%A Bresolin, Fabio
%A Bender, Ben
%A Wegner, Michael
%A Bonanos, Alceste
%A Williams, Stephen
%< avec comité de lecture
%@ 2041-8205
%J The Astrophysical journal letters
%I Bristol : IOP Publishing
%V 805
%N 2
%P 182
%8 2015
%D 2015
%Z 1505.00871
%R 10.1088/0004-637X/805/2/182
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]Journal articles
%X We present a quantitative spectroscopic study of twenty-seven red supergiants in the Sculptor Galaxy NGC 300. J-band spectra were obtained using KMOS on the VLT and studied with state of the art synthetic spectra including NLTE corrections for the strongest diagnostic lines. We report a central metallicity of [Z]= -0.03 +/- 0.05 with a gradient of -0.083 +/- 0.014 [dex/kpc$^{-1}$], in agreement with previous studies of blue supergiants and H II-region auroral line measurements. This result marks the first application of the J-band spectroscopic method to a population of individual red supergiant stars beyond the Local Group of galaxies and reveals the great potential of this technique.
%G English
%2 https://hal.science/hal-01972061v1/document
%2 https://hal.science/hal-01972061v1/file/1505.00871v1.pdf
%L hal-01972061
%U https://hal.science/hal-01972061
%~ IN2P3
%~ CNRS
%~ LUPM
%~ UNIV-MONTPELLIER
%~ LUPM_AS
%~ UM-2015-2021