The delta Scuti star BI Canis Minoris (identically equals HD 66853): Pulsational behavior and a critical discussion of physical parameter determination

Details The delta Scuti star BI Canis Minoris (identically equals HD 66853): Pulsational behavior and a critical discussion of physical parameter determination The delta Scuti star BI Canis Minoris (identically equals HD 66853): Pulsational behavior and a critical discussion of physical parameter determination

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...281...66m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 1, p. 66-72

Astronomy and Astrophysics

Astrophysics

13

Periodic Variations, Stellar Magnitude, Stellar Models, Stellar Oscillations, Stellar Spectra, Data Reduction, Light Curve, Spectrum Analysis, Stellar Spectrophotometry

Scientific paper

A two site photometric campaign on the delta Scuti star BI CMi (2302 V observations over 16 nights) has allowed us to detect unambiguously four pulsation frequencies nul = 8.246, nu2 = 8.865, nu3 = 7.433 and nu4 = 8.515 c/d) with amplitudes between 22 and 5 mmag. The data also show the presence of the nonlinear coupling term nu1 + nu2, the 2 nu1 term and the possible presence of two other frequencies with amplitudes of 2-3 mmag. Other components with further smaller amplitudes are probably present, but the data do not allow reliable identifications. We discuss the identification of the pulsation modes in term of nonradical p modes, and we also point out the uncertainties on these identification associated to the physical parameter estimates. The possible microvariability of HD 67028, one of the two comparison stars, is also discussed.

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