AcDc - A new code for the NLTE spectral analysis of accretion discs: application to the helium CV AM CVn

Abstract

We present a recently developed code for detailed NLTE calculations of accretion disc spectra of cataclysmic variables and compact X-ray binaries. Assuming a radial structure of a standard alpha-disc, the disc is divided into concentric rings. For each disc ring the solution of the radiation transfer equation and the structure equations, comprising the hydrostatic and radiative equilibrium, the population of the atomic levels as well as charge and particle conservation, is done self-consistently. Metal-line blanketing and irradiation by the central object are taken into account. As a first application, we show the influence of different disc parameters on the disc spectrum for the helium cataclysmic variable AM CVn.

7 pages, 11 figures to be published in A&A

References in corpus (4)

• Non-LTE Models and Theoretical Spectra of Accretion Disks in Active Galactic Nuclei. IV. Effects of Compton Scattering and Metal Opacities
• Non-LTE Models and Theoretical Spectra of Accretion Disks in Active Galactic Nuclei. III. Integrated Spectra for Hydrogen-Helium Disks
• Non-LTE Models and Theoretical Spectra of Accretion Disks in Active Galactic Nuclei II. Vertical Structure of the Disk
• Non-LTE Models and Theoretical Spectra of Accretion Disks in Active Galactic Nuclei

Cited by in corpus (15)

• VLT spectroscopy and non-LTE modeling of the C/O-dominated accretion disks in two ultracompact X-ray binaries
• SDSS J080449.49+161624.8: A peculiar AM CVn star from a colour-selected sample of candidates
• Non-LTE models for the gaseous metal component of circumstellar discs around white dwarfs
• XMM-Newton observations of AM CVn binaries
• A Characterization of the Circumstellar Gas around WD 1124-293 using Cloudy
• Accretion-disc model spectra for dwarf-nova stars
• The gaseous debris disk of the white dwarf SDSS J1228+1040. HST/COS search for far-ultraviolet signatures
• Modeling the EUV spectra of optically thick boundary layers of dwarf novae in outburst
• Synthetic NLTE accretion disc spectra for the dwarf nova SS Cyg during an outburst cycle
• Accretion of helium and metal-rich gas onto neutron stars and black holes at high luminosities
• Non-LTE spectral models for the gaseous debris-disk component of Ton 345
• Spectral modeling of gaseous metal disks around DAZ white dwarfs
• Non-LTE Models for Neutron Star Atmospheres and Supernova-Fallback Disks
• New Ultraviolet Observations of AM CVn
• Non-LTE modeling of supernova-fallback disks