Premium
On the UV ‐excesses of cepheid variables
Author(s) -
Nikolov N. S.,
Ivanov G. R.
Publication year - 1974
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.19742950503
Subject(s) - cepheid variable , physics , astrophysics , amplitude , connection (principal bundle) , optics , mathematics , geometry , stars
On the basis of the intrinsic ( U – B ) 0 colours of the cepheid variables, found by the authors, the UV ‐excesses in the maximum and minimum light δ( U – B ) max and δ( U – B ) min are defined. It is found out that the UV ‐excesses in the maximum light δ( U – B ) min increase with the period P (Fig. 2), but there is no correlation between δ( U – B ) min and log P . A correlation between δ( U – B ) max and the “amplitude defects” f B is also determined. These results in connection with some other considerations, as well as the possible causes of the UV ‐excesses, are discussed.