On the magnetic nature of GQ MUSCAE

Abstract

view Abstract Citations (38) References (63) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the Magnetic Nature of GQ MUSCAE Diaz, M. P. ; Steiner, J. E. Abstract An observational study of the classical nova GQ Mus is presented. CCD photometry and time-resolved spectroscopic measurements are analyzed in the context of accretion onto a magnetic white dwarf. A long-term ephemeris and the light curve characteristics in the R filter are derived from photometric monitoring around the orbit. Radial velocity measurements confirm the orbital period of 85 minutes and indicate that the high ionization lines seen in the spectrum of this object like O VI lambda-3811 are formed in the binary system. The analysis of the orbital variation in the line profile together with the Doppler imaging of the system suggest that a significant fraction of the He II lambda-4686 line is produced in the surface of the secondary star. The analysis of the Doppler imaging in the light of He II lambda-4686 favors the funneled accretion interpretation. The photometric data available for this system were used to model the main properties of the magnetically driven accretion in the system. As a result we claim the occurrence of a high accretion rate (M(dot) greater than 10-8 solar mass/yr) which causes the column to be optically thick and strong companion illumination effects. Publication: The Astrophysical Journal Pub Date: April 1994 DOI: 10.1086/173982 Bibcode: 1994ApJ...425..252D Keywords: Astrophysics; Cataclysmic Variables; Deposition; Doppler Effect; Magnetic Fields; Novae; Spectrum Analysis; Tomography; White Dwarf Stars; Charge Coupled Devices; Light Curve; Magnetic Spectroscopy; Photometry; Radial Velocity; Stellar Models; Velocity Measurement; Astrophysics; STARS: INDIVIDUAL CONSTELLATION NAME: GQ MUSCAE; STARS: MAGNETIC FIELDS; STARS: NOVAE; CATACLYSMIC VARIABLES full text sources ADS | data products SIMBAD (14)