Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263..123p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 123-128.
Astronomy and Astrophysics
Astrophysics
10
Semiregular Variable Stars, Stellar Spectrophotometry, Supergiant Stars, H Ii Regions, Light Curve, Power Spectra, Stellar Color, Stellar Evolution, Stellar Oscillations
Scientific paper
New photoelectric photometry of the yellow semiregular variable HR 8752 (= V509 Cas) made between 1986 and 1991 is presented. Its light curve is very complex, showing a steady decrease in brightness and colors. Period analysis revealed two (possibly three) periods with changing amplitudes. The origin of the amplitude changes may be a change from fundamental to overtone pulsation, though other explanations are equally possible. The evolutionary state of the variable is uncertain. A possible connnection between HR 8752 and the H II zone S151 is pointed out.
Percy John R.
Zsoldos Endre
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