BIB-VERSION:: AST-PP-v1.0 ID:: epreps.stsci//prep1199 ENTRY:: March 9, 1998 TITLE:: Spiral Shocks in Accretion Discs SUBTITLE:: AUTHOR:: , Patrick Godon (1) (2) AUTHOR:: Livio, Mario (1) AUTHOR:: Lubow, Steve (1) AFFIL:: (1) Space Telescope Science Institute 3700 San Martin Dr. Baltimore, MD 21218 USA AFFIL:: (2) Jet Propulsion Laboratory, California Institute of Technology 4800 Oak Grove Dr., MS 238-332 Pasadena, CA 91109 DATE:: December 1997 JOURNAL:: To appear in: SUBMITTED:: ACCEPTED:: OTHER_ACCESS:: COPYRIGHT:: Copyright 1997 The Association of Universities for Research in Astronomy, Inc. All Rights Reserved. LANGUAGE:: English ABSTRACT:: We perform two-dimensional numerical calculations of the tidal interaction between the companion star and the disc around the primary, in a cataclysmic variable system with parameters appropriate for the eclipsing dwarf nova binary IP Peg. We show that a spiral shock pattern is indeed obtained. We find, however, that it is impossible to reproduce the two-armed spiral that has been recently observed in IP Peg (Steeghs, Harlaftis, & Horne 1997) for realistic discs. END:: epreps.stsci//prep1199