Discovery of the 2001 Outburst of WZ Sagittae
نویسندگان
چکیده
منابع مشابه
Discovery of 15 - second oscillations in Hubble Space Telescope observations of WZ Sagittae following the 2001 outburst 1
We report the discovery of 15-s oscillations in ultraviolet observations of WZ Sge obtained with the Hubble Space Telescope approximately one month after the peak of the 2001 outburst. This is the earliest detection of oscillations in WZ Sge following an outburst and the first time that a signal near 15 s has been seen to be dominant. The oscillations are quite strong (amplitude ≃ 5%), but not ...
متن کاملDramatic Spectral Evolution of WZ Sagittae during the 2001 Superoutburst
We carried out optical spectroscopic observations of the most enigmatic dwarf nova WZ Sge in 11 nights during the 2001 superoutburst. Our observations covered the period from the initial phase several hours before the maximum to the ninth maximum of the rebrightening phase. The first spectrum shows absorption lines of H i (except for Hα), He i, and Na i, as well as emission lines of Heii , C ii...
متن کاملHelical Tomography of an Accretion Disk by Superhump Light Curves of the 2001 Outburst of WZ Sagittae
A new method for analyzing complex superhump light curves for the 2001 outburst of WZ Sagittae is proposed. The complexity arises because intrinsically time-varying and non-axisymmetric distributions of superhump light sources are coupled with the aspect effects around the binary orbital phase because of its high orbital inclination. The new method can disentangle these complexities by separati...
متن کاملThe 2001 Superoutburst of WZ Sagittae: A Clue to the Dynamics of Accretion Disks
We examine the light curve of the July-August 2001 superoutburst of WZ Sagittae. During the decline from maximum light the locally defined decay time increases from ∼ 4 d mag to ∼ 12 d mag over the first ∼ 15 d of the ∼ 25 d superoutburst, as the system faded from mV ≃ 8.5 to mV ≃ 10. The superoutburst is caused by the sudden accretion of ∼ 10 g of gas onto the white dwarf, and the deviation fr...
متن کاملWZ Sagittae as a DQ Herculis star
We argue that quiescent WZ Sge is a rapidly spinning magnetic rotator in which most of the matter transfered from the secondary is ejected from the system. Assuming that the observed 27.87 s oscillation period is due to the spinning white dwarf we propose that the other observed principal period of 28.96 s is a beat due to reprocessing of the rotating white dwarf beam on plasma blobs in Kepleri...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2004
ISSN: 0252-9211
DOI: 10.1017/s0252921100152467