HD 199757: a variable stars of extremely short period

Details HD 199757: a variable stars of extremely short period HD 199757: a variable stars of extremely short period

Feb 1961

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1961obs....81...25c&link_type=abstract

The Observatory, Vol. 81, p. 25-29 (1961)

Physics

12

Scientific paper

Recommended for spectrographic and photoelectric observations are the two variables of Beta Lyrae type, EP Lyrae and HP Lyrae. Both objects have been formerly classified as RV Tauri type stars according to their periods when no spectrographic observations were available. Objective prism plates taken with the Sonneberg 50/70/172 cm Schmidt telescope revealed the early supergiant spectral types of both stars.

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