Photometric surveys of suspected small-amplitude red variables. 3: an AAVSO photometric photometry survey

Physics – Optics

Scientific paper

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Astronomical Photometry, Red Giant Stars, Sky Surveys (Astronomy), Variable Stars, Amplitudes, Astronomical Catalogs, Cassegrain Optics, Light Curve, M Stars, Photometers, Stellar Oscillations

Scientific paper

We have carried out a survey of the photometric (V) variability of 61 'known' or suspected small-amplitude red variables, mostly M giants. Approximately two-thirds appear to be variable; several suspected variable comparison stars have also been identified. The incidence and average amplitude of variability increase rapidly from spectral type M0 III to M6 III.

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