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7 statements · 29% with external sources · numbers in brackets are citations
On other databases
2 identifiers linking Alpha Cygni variable across the web's reference databases
7 statements · 29% with external sources · numbers in brackets are citations
2 identifiers linking Alpha Cygni variable across the web's reference databases
From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0
Alpha Cygni variables are variable stars which exhibit non-radial pulsations, meaning that some portions of the stellar surface are contracting at the same time other parts expand. They are supergiant stars of spectral types B or A. Variations in brightness on the order of 0.1 magnitudes are associated with the pulsations, which often seem irregular, due to beating of multiple pulsation periods. The pulsations typically have periods of several days to several weeks.