Photometry of 5 galactic G-type supergiants

Details Photometry of 5 galactic G-type supergiants Photometry of 5 galactic G-type supergiants

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....80..134s&link_type=abstract

Astronomy and Astrophysics, vol. 80, no. 2, Dec. 1979, p. 134-137. Deutsche Forschungsgemeinschaft

Astronomy and Astrophysics

Astrophysics

10

G Stars, Stellar Spectrophotometry, Supergiant Stars, Ubv Spectra, Variable Stars, Electrophotometers, Stellar Magnitude

Scientific paper

The paper examines photoelectric UBV photometry for 5 galactic supergiants near spectral type GO. Low amplitude variations in magnitude and color on a time scale of a few months are found in 4 of these stars, and the variability of the R Pup is confirmed. A classification of these supergiants in a new category of very long-period low-amplitude cepheid-like variables cannot be assessed because of the insufficient time base of the observations, but the RV Tauri type variability can probably be excluded. Finally, the incompleteness of statistics of stable and low-amplitude variable galactic supergiants is noted, and the possible coexistence of low-amplitude and large-amplitude variables in the LMC cepheid instability strip is pointed out.

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