Photometric properties of the δ Scuti star BR Cancri

Details Photometric properties of the δ Scuti star BR Cancri Photometric properties of the δ Scuti star BR Cancri

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001mnras.323..923z&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 323, Issue 4, pp. 923-929.

Astronomy and Astrophysics

Astronomy

10

Techniques: Photometric, Stars: Individual: Br Cancri, Stars: Oscillations, &Delta, Scuti

Scientific paper

We present the results of a three-year Johnson V and Strömgren uvbyHβ photometric study of the δ Scuti star BR Cancri (BR Cnc). Our data sets consist of 1293 discrete differential magnitudes in Johnson V and yellow y filters, 883 in Strömgren v and 239 in ub filters. The Fourier analysis of the data suggests four pulsation frequencies for the variable: f1=24.978, f2=11.358, f3=11.808 and f4=27.914cycled-1. During the three observing years, the main frequency f1 kept its V(y) amplitude constant at about 6mmag but its v amplitude seems to be changing. Amplitude variations for all the three other frequencies are also claimed. The pulsation modes of the frequencies are discussed based on the colour data. Using uvbyβ data and calibrations in the literature, we derive the physical parameters for BR Cnc.

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