The disk Wolf-Rayet population of the nuclear starburst galaxy M83

Details The disk Wolf-Rayet population of the nuclear starburst galaxy M83 The disk Wolf-Rayet population of the nuclear starburst galaxy M83

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329...21c&link_type=abstract

Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present VLT imaging and spectroscopy of M83, revealing a large disk Wolf-Rayet population. The observed WC to WN ratio is ˜1.3, extending previous Local Group results to higher metallicity, and is significantly higher than current evolutionary predictions at high metallicity. Late subtypes dominate the WC population, arguing in favour of metallicity-dependent WR winds, of application to the hardness of Lyman continuum fluxes from young starbursts. Finally, source #74 is identified as a super star cluster, has a large WR content of ˜200 with N(WR)/N(O) ˜1, comparable to the WR cluster NGC3125-1.

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