Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasp..104.1039h&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 104, no. 681, p. 1039-1044.
Astronomy and Astrophysics
Astronomy
1
Dwarf Novae, Flare Stars, Stellar Rotation, Stellar Spectrophotometry, Absorption Spectra, Periodic Variations
Scientific paper
Spectroscopy and photometry are used to show that MR Persei, an object originally classified as a dwarf nova, is in fact a flare star. The automated CCD photometry consists of sequences of exposures within a single night as well as long-term photometry over a five-month interval. One sequence shows a 30-min flare, accompanied by post-flare 'dips'. A 0.2 mag variation with a period of about one-half day is also seen in this sequence. The long-term photometry is used to refine the period to 0.45483 d, which we attribute to the rotation of a spotted star. Evidence for membership of MR Per in the young Alpha Per cluster is considered, and found to be inconclusive.
Honeycutt Kent R.
Schlegel Eric M.
Turner Gary Wayne
Vesper David N.
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