 |
 |
Astron. Astrophys. 364, 701-705 (2000)
A newly discovered SU UMa-type dwarf nova, HS 1449+6415
D. Nogami ** 1,
D. Engels 2,
B.T. Gänsicke 1,
E.P. Pavlenko 3,4,
R. Novák 5 and
K. Reinsch 1
1 Universtäts-Sternwarte, Geismarlandstrasse 11, 37083 Göttingen, Germany
2 Hamburger Sternwarte, Universtät Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
3 Crimean Astrophysical Observatory, p/o Nauchny, 98409 Crimea, Ukraine
4 Isaac Newton Institute Chile, Crimean Branch
5 Nicholas Copernicus Observatory, Kraví hora 2, 616 00 Brno, Czech Republic
Received 21 August 2000 / Accepted 2 October 2000
Abstract
We report time-resolved photometric observations of the Hamburg
Quasar Survey-selected dwarf nova HS 1449+6415 (= RX J1450.5+6403)
during the interval from JD 2451672 to 2451724. During a long outburst
with a duration of ![[FORMULA]](img1.gif)
12 days, we
detected superhumps with a period of ![[FORMULA]](img2.gif)
,
revealing that this star is an SU UMa star. A short outburst which
lasted 3 days was found about 40 days after the onset of the
superoutburst. From quiescence observations, we determine an orbital
period of ![[FORMULA]](img3.gif)
. The small outburst
amplitude of 3.5 mag, the short
orbital period, and the normal outburst cycle length suggest that
HS 1449+6415 is an intermediate object between ER UMa stars with high
mass-transfer rates and WZ Sge stars with very low mass-transfer
rates.
Key words: accretion, accretion
disks 
surveys
stars: novae, cataclysmic
variables
stars:
oscillations
stars: individual: HS 1449+6415
* Visiting Astronomer, German-Spanish Astronomical Center, Calar Alto, operated by the Max-Planck-Institut für Astronomie, Heidelberg, jointly with the Spanich National Commission for Astronomy.
** Current address: Hida Observatory, University of Kyoto, Kamitakara, Gifu 506-1314, Japan
Send offprint requests to: D. Nogami (nogami@kusastro.kyoto-u.ac.jp)
Contents
© European Southern Observatory (ESO) 2000
Online publication: January 29, 2001
helpdesk.link@springer.de