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Two UV colours of the central part of M 31Two photographs of the galaxy M 31 have been obtained in the far UV with a Faust rocket experiment and in the near UV with the S 183 experiment aboard Skylab. Only the central part of the galaxy is detected. Reductions provide both the energy received and the angular area over M 31 from which it is emitted. The UV flux is brighter than expected from extrapolation of the visible spectrum. The distribution below 300 A is rather flat and different from previous OAO-2 observations. These results, combined with Lyman continuum flux evaluation, are used to discuss the temperature and the age of the stars which may be responsible for this anomalous UV distribution.
Document ID
19760059324
Document Type
Reprint (Version printed in journal)
Authors
Deharveng, J. M. (Centre National de la Recherche Scientifique Marseilles, France)
Laget, M. (Centre National de la Recherche Scientifique Marseilles, France)
Monnet, G. (Centre National de la Recherche Scientifique Marseilles, France)
Vuillemin, A. (CNRS, Laboratoire d'Astronomie Spatiale; Marseille, Observatoire Marseille, France)
Date Acquired
August 8, 2013
Publication Date
August 1, 1976
Publication Information
Publication: Astronomy and Astrophysics
Volume: 50
Issue: 3, Au
Subject Category
ASTROPHYSICS
Distribution Limits
Public
Copyright
Other