Published August 1981
| Version v1
Journal article
Further period changes in U Cephei
- 1. Illinois University, Urbana, IL
- 2. Dyer Observatory, Nashville, TN
- 3. Louth Observatory, Sedro Woolley, WA
- 4. Stephen F. Austin State University, Nacogdoches, TX
- 5. Helsinki University, Observatory, Helsinki, Finland
Description
The undisturbed eclipse timings of U Cep obtained over the last decade are discussed. It is shown that abrupt period changes of both signs were separated by intervals of essentially constant period. The apparent lack of a gradually changing period rules out a steadily-acting tidal torque in the Biermann-Hall (1973) theory. The most recent period decrease (April 1979) occurred rapidly (less than 40 days) and left no visible trace of circumstellar matter. Possible mechanisms of period changes of both signs are examined
Additional details
Publishing Information
- Journal Title
- Publ. Astron. Soc. Pac.
- Journal Volume
- 93
- Series
- Publ. Astron. Soc. Pac.
- Journal Page Range
- 464-469
- ISSN
- 0004-6280
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 14748197
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- MASS; MASS TRANSFER; ROTATION; SPECTROPHOTOMETRY; TIDES; VARIABLE STARS
- Descriptors DEC
- STARS