Statistics – Computation
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1565t&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 96, Nov. 1988, p. 1565-1569.
Statistics
Computation
10
Cepheid Variables, Computational Astrophysics, Stellar Spectrophotometry, Angular Velocity, Gravitational Effects, Light Curve, Stellar Luminosity, Stellar Magnitude, Stellar Temperature
Scientific paper
The Baade-Wesselink method has been reapplied to existing photometric and radial-velocity measures for the classical Cepheid δ Cephei, but a different approach to the analysis was adopted in which spectrophotometric narrowband KHG observations were used to isolate phase pairs of identical atmospheric temperature. Corrections for variable spectral-line blocking and changing effective gravity in the observed V magnitudes and B - V colors were analyzed semiempirically, and a solution obtained by minimizing the relative error in the result. The mean radius found for δ Cephei is 42.7 R_sun;±1.0 R_sun;, which is quite close to other recently derived radius estimates for this Cepheid, including theoretical values obtained from the secondary bump on its light curve.
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