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The Tarantula Nebula as a template for extragalactic star forming regions from VLT/MUSE and HST/STIS

Published online by Cambridge University Press:  28 July 2017

Paul A. Crowther ,
Saida M. Caballero-Nieves Open the ORCID record for Saida M. Caballero-Nieves [Opens in a new window] ,
Norberto Castro  and
Christopher J. Evans
Paul A. Crowther
Affiliation:
Department of Physics & Astronomy, University of Sheffield, Hounsfield Road, Sheffield, S3 7RH, UK email: [email protected]
Saida M. Caballero-Nieves
Affiliation:
Department of Physics & Astronomy, University of Sheffield, Hounsfield Road, Sheffield, S3 7RH, UK email: [email protected] Physics & Space Sciences, Florida Institute of Technology, 150 W. University Blvd, Melbourne, FL 32901, USA
Norberto Castro
Affiliation:
Department of Astronomy, University of Michigan, 1805 S.University, Ann Arbor, MI 48109, USA
Christopher J. Evans
Affiliation:
UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh, EH9 3HJ, UK
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Abstract

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We present VLT/MUSE observations of NGC 2070, the dominant ionizing nebula of 30 Doradus in the LMC, plus HST/STIS spectroscopy of its central star cluster R136. Integral Field Spectroscopy (MUSE) and pseudo IFS (STIS) together provides a complete census of all massive stars within the central 30×30 parsec2 of the Tarantula. We discuss the integrated far-UV spectrum of R136, of particular interest for UV studies of young extragalactic star clusters. Strong He iiλ1640 emission at very early ages (1–2 Myr) from very massive stars cannot be reproduced by current population synthesis models, even those incorporating binary evolution and very massive stars. A nebular analysis of the integrated MUSE dataset implies an age of ~4.5 Myr for NGC 2070. Wolf-Rayet features provide alternative age diagnostics, with the primary contribution to the integrated Wolf-Rayet bumps arising from R140 rather than the more numerous H-rich WN stars in R136. Caution should be used when interpreting spatially extended observations of extragalactic star-forming regions.

Keywords

stars: early-typestars: Wolf-Rayetopen clusters and associations: individual: NGC 2070galaxies: star clusters: individual: R136ISM: HII regions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 292 - 296
Copyright
Copyright © International Astronomical Union 2017 

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