Observational constraints on the ERE interpretation *
J.-M. Perrin and
Received 21 May 1999 / Accepted 1 July 1999
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
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© European Southern Observatory (ESO) 1999
Online publication: August 13, 199