Simultaneous UVBY Photometry of 28-ANDROMEDAE

Details Simultaneous UVBY Photometry of 28-ANDROMEDAE Simultaneous UVBY Photometry of 28-ANDROMEDAE

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...273..473r&link_type=abstract

Astronomy and Astrophysics, Vol.273, NO. 2/JUNII, P. 473, 1993

Astronomy and Astrophysics

Astrophysics

23

Stars: Variable, Stars: (Δ Sct, Photometry

Scientific paper

Simultaneous uvby photometric observations of the low amplitude (δ Scuti type star 28 Andromedae are presented. Analysis of the data using the Fourier transform method suggests 28 And as a monoperiodic pulsator. Using the classical 0- C method, it is found that the pulsation of this star can be well described by means of a linear ephemeris with a period of P = Od.069304118 over the last twenty-four years. Amplitude variations are also shown to be present from season to season. The analysis of the phase shifts and amplitude ratios between observed light and colour variations suggests that 28 And is a nonradial pulsator.

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