THE SYMBIOTIC SYSTEM AG DRA - AN UNEXPECTED PHOTOMETRIC PERIOD

Authors
BASTIAN U
Citation
U. Bastian, THE SYMBIOTIC SYSTEM AG DRA - AN UNEXPECTED PHOTOMETRIC PERIOD, Astronomy and astrophysics, 329(3), 1998, pp. 61-63
Citations number
12
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
329
Issue
3
Year of publication
1998
Pages
61 - 63
Database
ISI
SICI code
0004-6361(1998)329:3<61:TSSAD->2.0.ZU;2-Y
Abstract
A photometric period of about 380 days is found in 6810 visual magnitu de estimates of AG Dra. This is unexpected, since the orbital period o f the system is about 552 days. The period is confirmed by Hipparcos p hotometry. The new periodicity provides an additional constraint on ph ysical models for AG Dra. Detailed observations before the end of the present outburst phase may help to clarify its nature.