Secular Changes in the Classical Cepheid Y Ophiuchi

Details Secular Changes in the Classical Cepheid Y Ophiuchi Secular Changes in the Classical Cepheid Y Ophiuchi

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....110.1326f&link_type=abstract

Astronomical Journal v.110, p.1326

Astronomy and Astrophysics

Astronomy

12

Cepheids, Stars: Oscillations

Scientific paper

We provide new, extensive photoelectric photometry of the classical Cepheid Y Oph, and use this, together with other new and earlier photoelectric photometry, to re-examine the question of whether or not this Cepheid has shown a secular change in its pulsational amplitude over the last half-century. We conclude that its amplitude has declined at a rate similar to the average rate of Polaris' amplitude decline. We also re-examine the period change of Y Oph and find that this has been smooth without any sudden jumps or phase offsets during this timespan.

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