Noise-driven radiative shocks. II - Further implications for the quasi-periodic oscillations of the AM Herculis objects

Abstract

view Abstract Citations (22) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Noise-driven Radiative Shocks. II. Further Implications for the Quasi-periodic Oscillations of the AM Herculis Objects Wood, Kent S. ; Imamura, James N. ; Wolff, Michael T. Abstract The driven-shock model by Wolff et al. (1992) is extended and used to model the low-amplitude quasiperiodic oscillations (QPOs) driven by accretion noise in AM Her objects. The driven-shock model is discussed qualitatively with calculational details of the revised version. QPO-like features in the optical and X-ray are shown to be produced by bremsstrahlung-dominated shocks from accretion onto white dwarfs. These features are found to be consistent with the range of properties associated with the AM Her QPO sources. The bremsstrahlung-dominated shocks are shown to have linear responses for the conditions associated with QPO sources, and a luminosity expression for QPO sources is derived. The present analysis supports the shock-oscillation model for describing the optical QPOs from these objects. Publication: The Astrophysical Journal Pub Date: October 1992 DOI: 10.1086/171884 Bibcode: 1992ApJ...398..593W Keywords: Shock Wave Propagation; Stellar Mass Accretion; Stellar Oscillations; Stellar Radiation; White Dwarf Stars; Bremsstrahlung; Cyclotron Radiation; Stellar Luminosity; Stellar Models; X Ray Spectra; Astrophysics; RADIATION MECHANISMS: BREMSSTRAHLUNG; SHOCK WAVES; STARS: OSCILLATIONS; STARS: WHITE DWARFS full text sources ADS | data products SIMBAD (4) Related Materials (1) Part 1: 1958ApJ...127..194C