Open AccessPhotometric properties of the δ Scuti star BR Cancri
Author(s) -
Zhou AiYing,
Rodríguez E.,
Rolland A.,
Costa V.
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04275.x
Subject(s) - physics , amplitude , astrophysics , variable star , photometry (optics) , astronomy , cepheid variable , light curve , stars , optics
We present the results of a three‐year Johnson V and Strömgren uvby H β 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: f 1 =24.978, f 2 =11.358, f 3 =11.808 and f 4 =27.914 cycle d −1 . During the three observing years, the main frequency f 1 kept its V ( y ) amplitude constant at about 6 mmag 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.