Physics – Optics
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...151..403b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 151, no. 2, Oct. 1985, p. 403-407. Research supported by SERC and Department o
Physics
Optics
4
Acousto-Optics, Cepheid Variables, Dwarf Stars, Light Curve, Stellar Oscillations, Stellar Spectrophotometry, Optical Filters, Photometers, Stellar Color
Scientific paper
Light variations of the dwarf cepheid AI Velorum have been studied in several wavelength channels of narrow bandwidth using a prototype, acousto-optic filter photometer. The observations obtained during 8 nights have been examined using Least Squares Fourier Analysis tecniques. Using also phases from previously reported studies the period P0 of the fundamental mode of oscillation is found to be constant within given accuracy limits over an interval of 32 yr but a statistically significant increase in the period P1 of the first overtone is detected. The V, B and (B V) amplitudes for the different identified frequency components are greater than previously reported, with the most significant increase being in the P1 mode of oscillation. These new results suggest the possibility that there has been an enhancement of the energy in the P1 oscillation mode relative to P0.
Bates Brandon
Halliwell David R.
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