Premium
The cycle length of the U Geminorum star HT Cassiopeiae
Author(s) -
Wenzel W.
Publication year - 1987
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.2113080115
Subject(s) - astrophysics , physics , star (game theory) , binary number , binary star , orbital period , accretion (finance) , astronomy , stars , mathematics , arithmetic
The mean cycle length of the catalysmic binary HT Cas, which is remarkable because of the shortness of its orbital period, has been determined as 400 d ±50 d . The hitherto assuixed value of 30 d proved unfounded. Some aspects arising when classifying long‐cycle objects and SU Ursae Majoris variables are pointed out, a s well as the relation between large cycle length and small accretion rate.