The standard systems of the determinations of stellar rotational velocities (2)

Details The standard systems of the determinations of stellar rotational velocities (2) The standard systems of the determinations of stellar rotational velocities (2)

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993acasn..34..159p&link_type=abstract

Acta Astronomica Sinica (ISSN 0001-5245), vol. 34, no. 2, p. 164-172

Physics

Stellar Physics, Stellar Rotation, Velocity, Coefficients, Limb Darkening

Scientific paper

In this paper, it is shown that the effect of the limb-darkening probably plays an important role in determining stellar rotational velocities. The effect on the measured values of Ve sin i may reach by a factor of 17%. As the essential extension of an earlier work by us, this paper presents a new explanation for the systematic difference between the 'old' and 'new systems of stellar rotational velocities. The differences can be attributed mainly to: (1) the twice corrections for the limb-darkening in the 'old' system, and (2) the values of limb-darkeing coefficients used in the 'old' system are too large.

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