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Astron. Astrophys. 333, 264-268 (1998)

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Extended red emission (ERE) detected in the 30 Doradus nebula *

S. Darbon , J.-M. Perrin and J.-P. Sivan

Observatoire de Haute Provence du CNRS, F-04870 Saint Michel l'Observatoire, France

Received 21 August 1997 / Accepted 17 December 1997

Abstract

We present low-dispersion visible spectra of two regions of the 30 Doradus nebula. When corrected for atomic continuum emission and divided by the spectrum of the exciting and illuminating stars, one of the two spectra clearly shows Extended Red Emission (ERE) superimposed on the scattering component. This ERE band peaks around 7270 Å and is 1140 Å  width. HAC grains are found to explain the observed spectra in terms of scattering and luminescence.

Key words: ISM: individual objects: 30 Dor (LMC) – galaxies: Magellanic Clouds – galaxies: ISM – ISM: dust, extinction – ISM: lines and bands

* Based on observations made at the European Southern Observatory (ESO), La Silla (Chile)

Send offprint requests to: J.-P. Sivan

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© European Southern Observatory (ESO) 1998

Online publication: April 15, 1998
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