The difficulty of isolating rapid periodic variabilities in Be stars

Details The difficulty of isolating rapid periodic variabilities in Be stars The difficulty of isolating rapid periodic variabilities in Be stars

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mons.proc..147s&link_type=abstract

The First MONS Workshop: Science with a Small Space Telescope, held in Aarhus, Denmark, June 29 - 30, 1998, Eds.: H. Kjeldsen, T

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In ground-based observations, rapid periodic light variations of Be stars are difficult to isolate from the strong background of various other variabilities: The amplitudes are only a few 0.01 mag, the light curves often non-sinusoidal, and the periods close to 1 day, whereas competing irregular variations can occur on only little longer time scales. Although evidence for multiperiodicity (probably due to multi-mode nonradial pulsation) emerges from spectroscopy, its reliable photometric detection is still missing. Such a detection would be important as it would be of invaluable help in the otherwise ambiguous disentangling of temperature and velocity effects on the line profiles. The proposed MONS observations can yield the desirable long, uninterrupted stretches of data with high and constant sampling.

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