Last edited by Vudosho
Wednesday, July 22, 2020 | History

2 edition of Eclipse mapping of accretion disks in cataclysmic binaries. found in the catalog.

Eclipse mapping of accretion disks in cataclysmic binaries.

Keith Douglas Horne

Eclipse mapping of accretion disks in cataclysmic binaries.

by Keith Douglas Horne

  • 370 Want to read
  • 18 Currently reading

Published by California Institute of Technology in Pasadena, Calif .
Written in English


Edition Notes

Thesis (Ph.D.) - California Institute of Technology, 1983.

ID Numbers
Open LibraryOL13802889M

The outer accretion disk is detected at mid-eclipse with a spectrum that rises from to mJy between and {\AA}, consistent with combinations of cool blackbodies, blended Fe II emission lines, and Balmer continuum emission. The Goddard High Resolution Spectrometer on the Hubble Space Telescope has been used to monitor, through eclipse, the C IV Å and He II Å li We use cookies to enhance your experience on our continuing to use our website, you are agreeing to our use of cookies.

(Received; accepted) We propose a new method, emission-line eclipse mapping, to map the velocity fields of an accretion disk in position space. Quiescent dwarf novae usually exhibit double-peaked emission line profiles because of disk rotation. Abstract. The tomographic method Physical Parameter Eclipse Mapping is a tool to reconstruct spatial distributions of physical parameters (like temperatures and surface densities) in accretion discs of cataclysmic variables. After summarizing the method, we apply it to multi-colour eclipse light curves of various dwarf novae and nova-likes like VZ Scl, IP Peg in outburst, UU Aqr, V Oph and.

3 ACCRETION STREAM MAPPING, ASM The method The Accretion Stream Mapping method, henceforth called ASM,isbasedonclassical EclipseMappingofaccretion discs in eclipsing cataclysmic variables (Horne ). This classi-cal algorithm is used toreconstruct intensity distributionsin the accretion disc by tting the eclipse pro le and applying. "Indirect imaging has become the norm in studies of cataclysmic binaries and related objects – but after more than 15 years this is the first book to document the techniques in a systematic way. Eclipse Mapping of Accretion Discs. Pages Baptista, R. Echoes in X-ray Binaries: Mapping the Accretion Flow. Pages O.


Share this book
You might also like
Manual of clinical problems in obstetrics and gynecology

Manual of clinical problems in obstetrics and gynecology

Christs touch changes us

Christs touch changes us

Textbook of commerce

Textbook of commerce

Geohydrologic units of the coastal lowlands aquifer system, South-Central United States

Geohydrologic units of the coastal lowlands aquifer system, South-Central United States

Final report of Departmental Committee on maternal mortality & morbidity.

Final report of Departmental Committee on maternal mortality & morbidity.

Subheading index.

Subheading index.

On matters relating to church and state

On matters relating to church and state

Diagnostic ultrasound

Diagnostic ultrasound

Radar watchkeeping

Radar watchkeeping

A world census of tropical ecologists

A world census of tropical ecologists

Gender and education in Tanzanian schools

Gender and education in Tanzanian schools

A treatise of dreams & visions

A treatise of dreams & visions

Some revised names in African Lepidoptera-Heterocera

Some revised names in African Lepidoptera-Heterocera

Eclipse mapping of accretion disks in cataclysmic binaries by Keith Douglas Horne Download PDF EPUB FB2

A method of mapping the surface brightness distributions of accretion discs in eclipsing cataclysmic binaries is described Eclipse mapping of accretion disks in cataclysmic binaries. book tested with synthetic eclipse data. Accurate synthetic light curves are computed by numerical simulation of the accretion disc eclipse, and images of the disc are reconstructed by maximum entropy by: Abstract.

Surface brightness distributions for accretion disks in eclipsing cataclysmic binaries may be reconstructed from observed eclipse light curves by use maximum entropy imaCited by: 1.

HST Spectral Maps of Accretion Disks in Cataclysmic Binaries. Raymundo Baptista and Keith Horne University of s, North Haugh, s, Fife KY16 9SS, Scotland Abstract: Maximum-entropy eclipse mapping techniques are used in the analysis of HST/FOS time-resolved low-dispersion spectroscopy of the eclipsing nova-like variable UX UMa.

The author reviews recent progress in the study of accretion discs in cataclysmic variables (CVs) and X-ray binaries. Observations of CVs, especially eclipse mapping, give detailed agreement with steady-state disc theory.

Coronae and winds are probably universal features of discs in such systems. The present ignorance of the disc viscosity is the main barrier to progress in understanding time Author: A.

King. ACCRETION disks play an important role in many astrophysical environments, such as active galactic nuclei, protostellar systems, X-ray binaries and cataclysmic variables.

The lack of Cited by: Accurate synthetic light curves are computed by numerical simulation of the accretion disk eclipse, and disk images are reconstructed by maximum entropy methods, in the present surface brightness distribution mapping technique for accretion disks in eclipsing cataclysmic binaries.

This mapping method, which is tested against synthetic eclipse data, permits powerful tests of accretion disk. Abstract. Observations of eclipse light curves are being used to make maps of the accretion disks in eclipsing cataclysmic variables.

By observing the structure of real accretion disks, we can test models of the structure of accretion disk atmospheres, learn about accretion disk viscosity by tracking time-variations in the structure of dwarf nova disks undergoing outbursts, and measure mass. Knigge, C., Drew, J.E.: Eclipse mapping of the accretion disk wind in the cataclysmic variable UX Ursae Majoris.

ApJ() ADS CrossRef Google Scholar This work presents a new tomography algorithm, the Physical Parameter Eclipse Mapping method. It has been designed to reconstruct the structure of accretion disks in cataclysmic variables in terms of the basic physical parameters.

Cataclysmic variables are close interacting binaries, in which mass transfer from one of the stars, typically a main sequence star, to the other star, a white dwarf. We present a new method to map the surface brightness of the accretion streams in AM Herculis systems from observed light curves.

Extensive tests of the algorithm show that it reliably reproduces the intensity distribution of the stream for data with a signal-to-noise ratio ga5. As a first application, we map the accretion stream emission of \Line{C}{iv}{} in the polar. A method of mapping the surface brightness distributions of accretion discs in eclipsing cataclysmic binaries is described and tested with synthetic eclipse data.

Eclipse mapping of accretion discs Raymundo Baptista1 Departamento de F sica, UFSC, Campus Trindade,Florian opolis, Brazil Abstract. The eclipse mapping method is an inversion technique that makes use of the information contained in eclipse light curves to probe the structure, the spectrum and the time evolution of accretion discs.

The eclipse mapping method is an inversion technique that makes use of the information contained in eclipse light curves to probe the structure, the spectrum and the time evolution of accretion discs.

For CVs (and rest of AWBs, see Sections 2 Nonmagnetic cataclysmic variables, 6 On the accreting white dwarf binaries that are related to cataclysmic variables) virial temperatures in the disk are around 10–45 keV (assuming M ⊙ - M ⊙ WDs) which are typical values detected in quiescence, outburst and high accretion-rate states.

Angular Momentum Transport in Low Mass Accretion Disks (E T Vishniac & P H Diamond) The Emission Lines from Accretion Disks in Cataclysmic Variable Stars (E L Robinson et al.) Eclipse Mapping of Accretion Disks: The First Decade (K Horne) Atmospheres of Accretion Disks and the Emerging Spectra (G Shaviv & R Wehrse).

Eclipse mapping of accretion disks in cataclysmic binaries. By Keith Douglas Horne. Abstract. Surface brightness distributions for accretion disks in eclipsing cataclysmic binaries may be reconstructed from observed eclipse light curves by use maximum entropy imaging methods.

Three-color eclipse photometry of six eclipsing cataclysmic binaries. We review two indirect imaging techniques that are now being used to form spatially-resolved images of accretion disks in mass-transfer binaries, mainly the cataclysmic variable stars.

The eclipse mapping method reconstructs the continuum brightness distribution on the surface of a disk from the shape of the light curve during eclipses of the. Unveiling Accretion Disks - Physical Parameter Eclipse Mapping of Accretion Disks in Dwarf Novae College University of Göttingen Grade cum laude Author Sonja Isaacs (Author) Year Pages Catalog Number V ISBN (eBook) File size KB Language English Tags.

shown here that flat-disk eclipse mapping does reproduce the radial brightness structure of flared accretion disks very well, provided that the inner disk is not obscured by the outer rim of the disk.

Key words: binaries: eclipsing | cataclysmic variables | accretion 1. Introduction In the study of accretion disks in cataclysmic variable. Simulations with 3D eclipse mapping give no support to the suggestion of self-shielding of the accretion disc of V Pup, indicating a geometrically thin disc.

Eclipse maps reveal two structures. Abstract. I review three current research topics in the observational study of the accretion disks in cataclysmic variable stars: the star-disk connection, eclipse mapping developments, and HST observations.

First, an R-3/2 emissivity is inferred from the double-peaked velocity profiles of H I and Ca II emission lines from the chromospheres of quiescent accretion disks.The eclipse mapping method is an inversion technique that makes use of the information contained in eclipse light curves to probe the structure, the spectrum and the time evolution of accretion discs.

In this review I present the basics of the method and discuss its different implementations.X-ray binaries are some of the most varied and perplexing systems known to astronomers. The compact object which accretes mass from its companion star may be a white dwarf, neutron star, or black hole, whereas the donor star can be a 'normal' star or a white dwarf.

The various combinations differ widely in their behaviour, and this timely volume provides a unique reference of our knowledge to Reviews: 1.