Hr 7308: A unique Cepheid

Details Hr 7308: A unique Cepheid Hr 7308: A unique Cepheid

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ssrv...27..419p&link_type=abstract

Space Science Reviews, Volume 27, Issue 3-4, pp. 419-424

Physics

Scientific paper

We have obtained photometric observations and radial velocities of the F6I-IIb star HR 7308. The spectral type, the period (\underset{raise0.3emsmashriptscriptstyle\cdot}{d}), the relative range and phase of light, colour and velocity variations all suggest that the star is a small-amplitude Cepheid. The metal abundance appears to be normal. However, the light amplitude decreased slowly during 1978 from 0\underset{raise0.3emsmashriptscriptstyle\cdot}{m}3 to 0\underset{raise0.3emsmashriptscriptstyle\cdot}{m}1, and increased during 1979 and 1980 from 0\underset{raise0.3emsmashriptscriptstyle\cdot}{m}05 to 0\underset{raise0.3emsmashriptscriptstyle\cdot}{m}15. Such behaviour is unprecedented in a population I Cepheid.

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