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Influence of rotational darkening on ultraviolet interstellar extinction
Author(s) -
Friedemann C.
Publication year - 1989
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113100411
Subject(s) - physics , stars , extinction (optical mineralogy) , astrophysics , ultraviolet , astronomy , interstellar medium , galaxy , optics
The influence of rotational darkening on ultraviolet stellar fluxes of fast rotating stars has been rediscussed. For this aim ANS filter‐photometric magnitudes of weakly reddened B stars ( E ( B ‐ V ) 0.1 mag) were corrected for interstellar extinction. The distribution of the stars in the rotationa velocity — colour index diagrams displays a scatter exceeding the photometric errors. The distributions of the stars agree qualitatively with the theoretically calculated colour indices. The effect of rotational darkening should be taken into account as a possible source for individual deviations of the interstellar extinction from the average law.