Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.281..626s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. Vol. 281, No. 2, p. 626 - 636
Astronomy and Astrophysics
Astronomy
58
Accretion, Accretion Discs -- Stars: Emission-Line, Be -- Stars: Individual: Ip Peg -- Stars: Individual: Ss Cyg -- Stars: Magnetic Fields -- Novae, Cataclysmic Variables, Dwarf Novae: Outbursts, Dwarf Novae: Spectral Variations, Dwarf Novae: Light Curves, Dwarf Novae: Stellar Activity, Dwarf Novae: Stellar Magnetic Fields
Scientific paper
Two dwarf novae, IP Peg and SS Cyg, were observed with the William Herschel Telescope at La Palma as part of a spectropolarimetric study on cataclysmic variables. The authors present phase-resolved spectroscopy, covering almost a full orbit of these systems during their outburst state, and use Doppler tomography to map the observed emission lines. Secondary star emission is strong for both systems, especially in the Balmer lines. The IP Peg accretion disc emission is clearly asymmetric. Both systems also display peculiar low-velocity emission components in several emission lines, producing emission spots near the origin of the Doppler maps. The authors investigate these components and discuss possible sources of this emission. They propose slingshot prominences as a possible interpretation of this stationary emission and discuss this model in more detail. The observed emission can be attributed to prominence material at a temperature of 2×104K and a number density of 1012cm-3. The authors find that kG fields for the secondary star are sufficient to store the ≡1018g in a typical prominence.
Donati Jean-Francois
Horne Keith
Marsh Thomas R.
Steeghs Daniel
No associations
LandOfFree
Slingshot prominences during dwarf nova outbursts? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Slingshot prominences during dwarf nova outbursts?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slingshot prominences during dwarf nova outbursts? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1383324