Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-17
Astronomische Nachrichten, Vol. 329. pp. 39-43 (2008)
Astronomy and Astrophysics
Astrophysics
5 pages, 4 figures, accepted for publication in Astronomische Nahrichten
Scientific paper
10.1002/asna.200610832
EM Cygni is a Z Cam-subtype eclipsing dwarf nova. Its orbital period variations were reported in the past but the results were in conflict to each other while other studies allowed the possibility of no period variation. In this study we report accurate new times of minima of this eclipsing binary and update its O-C diagram. We also estimate the mass transfer rate in EM Cygni system and conclude that the mass transfer is far from the critical value. The mass transfer rate determined from the eclipse timings is in agreement with the spectroscopically determined value.
Biro Imre Barna
Borkovits Tamás
Csizmadia Sz.
Hegedüs Tibor
Kiss Zoltan Tamas
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