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Astron. Astrophys. 348, 990-992 (1999)


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Research Note

Observational constraints on the ERE interpretation *

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

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

Received 21 May 1999 / Accepted 1 July 1999

Abstract

Empirical relationships on the properties of the Extended Red Emission (ERE) are presented. They are based on published observational data and on new results obtained on reflection nebulae illuminated by cold stars. The plot of the width versus the central wavelength of the ERE band is in agreement with laboratory properties of the materials commonly proposed as the ERE carriers. But this is not the case for the plot of the ERE band width versus the effective temperature of the nebula illuminating star.

Key words: ISM: general – ISM: reflection nebulae – ISM: dust, extinction – ISM: H ii regions – ISM: planetary nebulae: general – galaxies: individual: M 82

* Partly based on observations made at Observatoire de Haute Provence du CNRS and at European Southern Observatory (ESO), La Silla (Chile)

Send offprint requests to: J.-P. Sivan

© European Southern Observatory (ESO) 1999

Online publication: August 13, 199

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