Hostname: page-component-7bb8b95d7b-495rp Total loading time: 0 Render date: 2024-09-06T04:23:01.415Z Has data issue: false hasContentIssue false
  • English
  • Français

Model Spectra for Accretion Disks Truncated at the Inner Edge

Published online by Cambridge University Press:  12 April 2016

Richard A. Wade ,
Marcos Diaz  and
Ivan Hubeny
Richard A. Wade
Affiliation:
Department of Astronomy & Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802
Marcos Diaz
Affiliation:
Department of Astronomy & Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802
Ivan Hubeny
Affiliation:
Goddard Space Flight Center, Code 681, Greenbelt, MD 20771

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Attempts to model the FUV spectra of accretion disks in cataclysmic variables have suggested that in some cases the innermost part of the disk is “missing”. We present computed spectra of accretion disks with various amounts of the inner disk removed arbitrarily, to illustrate whether the absence of the inner disk can be detected via the profiles of strong lines. Results are presented for lines in the UV and FUV for selected disk parameters and inclinations. UV/FUV line diagnostics can in principle establish whether the hot inner disk is present as expected from standard steady-state disk theory. The presence or absence of the inner disk has direct impact on the interpretation of the EUV spectra of cataclysmic variables, in particular the boundary layer emission.

Type
VI. Cataclysmic Variable Stars
Information
International Astronomical Union Colloquium , Volume 152: Astrophysics in the Extreme Ultraviolet , 1996 , pp. 355 - 359
Copyright
Copyright © Kluwer 1996

References

Beuehmann, K. & Thomas, H.-C. 1990, Detection of emission lines from the secondary star in IX Velorum = CPD -48°1577, A&A, 230, 326 Google Scholar
Hubeny, I. 1988, A computer program for calculating non-LTE model stellar atmospheres, Comp. Phys. Comm., 52, 103 Google Scholar
Hubeny, I. 1991, Model atmospheres for accretion disks, In Structure and Emission Properties of Accretion Disks, ed. Bertout, C. et al., IAU Colloquium, Editions Frontières, 129, 227,Google Scholar
Hubeny, I., Lanz, T., & Jeffery, C.S. 1994, TLUSTY & SYNSPEC—a user’s guide, Collaborative Computational Project 7, documentation fileGoogle Scholar
Long, K.S., Wade, R.A., Blair, W.P., Davidsen, A.F., & Hubeny, I. 1993, Observations of the bright nova-like variable IX Velorum with the Hopkins Ultraviolet Telescope., ApJ, 426, 704 Google Scholar