Title: Multifrequency observations of the optically active radio-quiet quasar GQ Comae. II - Ultraviolet, optical, and infrared continuum variability
Abstract: view Abstract Citations (33) References (50) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Multifrequency Observations of the Optically Active Radio-quiet Quasar GQ Comae. II. Ultraviolet, Optical, and Infrared Continuum Variability Sitko, Michael L. ; Sitko, Annamaria K. ; Siemiginowska, Aneta ; Szczerba, R. Abstract This paper summarizes the data and preliminary results of a 3 yr long project to monitor the continuum variability of GQ Comae (PG 1202+281) from 0.12 microns to 3.5 microns. Substantial variability in the optical/ultraviolet flux was observed. The variability is examined using a geometrically thin accretion disk model. The model is able to reproduce the variations, but contains problems with physical consistency. A comparison of the optical/ultraviolet data and the infrared data indicates that the flux at 2.2 microns did not respond to the optical- ultraviolet continuum increase until nearly 250 days after the outburst and suggests that the variable flux at this wavelength is due to heated dust. We model the infrared emission with a dust component which is heated by the radiation from the accretion disk. We show that a simple model using a disklike distribution of heated dust grains can explain most of the infrared variability in a natural way. Publication: The Astrophysical Journal Pub Date: May 1993 DOI: 10.1086/172649 Bibcode: 1993ApJ...409..139S Keywords: Accretion Disks; Active Galactic Nuclei; Infrared Astronomy; Quasars; Ultraviolet Astronomy; Galactic Radiation; Light Curve; Astrophysics; ISM: DUST; EXTINCTION; GALAXIES: PHOTOMETRY; GALAXIES: QUASARS: INDIVIDUAL NAME: GQ COMAE; INFRARED: GALAXIES; ULTRAVIOLET: GALAXIES full text sources ADS | data products SIMBAD (3) NED (1) MAST (1) INES (1) Related Materials (1) Part 1: 1990ApJS...72..777S