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Rapid oscillations of five stars in the spectral range A and F. I
Author(s) -
Hildebrandt G.
Publication year - 1992
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113130404
Subject(s) - physics , stars , astrophysics , star (game theory) , telescope , oscillation (cell signaling) , o type main sequence star , a type main sequence star , astronomy , double star , k type main sequence star , t tauri star , biology , genetics
The five stars HD 4849, HD 24712, HD 182475, HD 184552 and HD 215874 are a small group of objects enclosed in a larger observational programme for searching of rapid oscillations. They have been observed with the 50 cm ESO‐telescope at La Silla (Chile). These objects are characterized as a suspected δ Scuti‐type star, an Ap star, an A9 V star, an A1m star and an A9 III‐IV star, respectively. For the first two stars the periods, dedected by other authors, were confirmed. For HD 182475 a period of 112.3 min has been estimated. In the case of HD 184552 an oscillation with a period of 163.3 min has been found. The star HD 215874 shows unambiguously a variation with a period of 97.2 min.