Simultaneous Doppler maps of IP Peg in outburst

Abstract

IP Pegasi is an eclipsing dwarf nova lying above the period gap with an orbital period of 3.8h. It is the first cataclysmic variable to show evidence of spiral arms in its accretion disc. We present new time-resolved echelle spectroscopic observations of IP Peg, covering the 3900-7700 Angstrom range. This allows us to produce simultaneous Doppler Maps in 9 emission lines.

2 pages, 2 figures (New version: updated format of figures), to appear in the Proceedings of conference 'The Astrophysics of Cataclysmic Variables and Related Objects', Strasbourg, France, 11-16 July 2004, (ASP Conference Series, Eds. J.M. Hameury and J.P. Lasota)