The standard systems of stellar rotation measurements (II)

Details The standard systems of stellar rotation measurements (II) The standard systems of stellar rotation measurements (II)

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993cha%26a..17..393p&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 17, Issue 4, p. 393-400.

Astronomy and Astrophysics

Astrophysics

Stellar Rotation, Spectral Lines, Limb Darkening

Scientific paper

The limb darkening effect on the measurement of stellar rotation is discussed in this paper. It is shown that this effect plays an important role in the measurement of Ve sin i. In the extreme case with the limb darkening coefficient of 1.0, it may cause a difference up to 17%. As a sequel to paper [1], this work presents the following new explanation for the systematic differences between Slettebak's new and old systems. The main causes of the systematic differences are: (1) The old system made an inadequate twice repeated correction for the limb darkening. (2) Owing to the historical reason, the old system used too large limb darkening coefficients.

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