Determination of radii of cepheids. II - Radial velocities and dimensions of AD GEM

Details Determination of radii of cepheids. II - Radial velocities and dimensions of AD GEM Determination of radii of cepheids. II - Radial velocities and dimensions of AD GEM

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...53...85i&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 53, July 1983, p. 85-89. In French.

Astronomy and Astrophysics

Astrophysics

12

Cepheid Variables, Radial Velocity, Stellar Spectrophotometry, Electrophotometry, Fourier Series, Stellar Color, Stellar Magnitude, Ubv Spectra

Scientific paper

A radial velocity spectrometer has been used to observe the classical Cepheid AD Gem, yielding 38 accurate velocities. These, together with UBV measurements from the literature, were then used in radius determinations through the solution of a system of equations. A limited Fourier series from the observations was used to calculate V magnitudes and B-V color indices from 280 epochs within one period. A radius of 35.6 + or - 0.6 solar radii is obtained, which is compatible with the most recent period radius relations.

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