Non-Magnetic Cataclysmic Variables

© Dana Berry (STScI)

© 1998 M. A. Garlick: "Cataclysm II"

© 2002 M. A. Garlick: "Cataclysm IV"

There are two important structures in a non-magnetic CV:
	1) The accretion disk, where about half of the gravitational potential energy of the accreting material is released, and
	2) The boundary layer between the accretion disk and the surface of the white dwarf, where the kinetic energy of the flow is thermalized and radiated.
Because the effective temperature of the accretion disk ranges from ~ 5000 K at its outer edge to ~ few x 104 K at its inner edge, it radiates over a broad energy range from the optical through the far ultraviolet.
Because of the small size and high luminosity of the boundary layer, its temperature is significantly higher than that of the accretion disk. When the mass-accretion rate is high (Mdot ~ 10-8 Msun/yr; e.g., novalike variables and dwarf novae in outburst), the boundary layer is optically thick and its temperature ~ 105 K (10 eV), so it radiates primarily in the extreme ultraviolet and soft X-ray bandpasses. When the mass-accretion rate is low (Mdot ~ 10-11 Msun/yr; e.g., dwarf novae in quiescence), the boundary layer is optically thin and its temperature ~ 108 K (10 keV), so it radiates primarily in the X-ray bandpass.
As evidenced by the P Cygni profiles of their ultraviolet resonance lines, high mass-accretion rate non-magnetic CVs are known to have strong (Mdot ~ 10-11 Msun/yr), high-velocity (v ~ 3000 km/s) outflows ("winds") which are thought to be driven from the surface of the accretion disk by radiation pressure and possibly magnetic forces.

Chandra HETG Spectra of SS Cyg and U Gem in Quiescence and Outburst
Mauche, C. W., Wheatley, P. J., Long, K. S., Raymond, J. C., and Szkody, P.
2005, in The Astrophysics of Cataclysmic Variables and Related Objects, ed. J. M. Hameury and J. P. Lasota (San Francisco: ASP), in press.
[UCRL-PROC-206851]


Chandra X-ray Observations of WZ Sge in Superoutburst
Wheatley, P. J., and Mauche, C. W.
2005, in The Astrophysics of Cataclysmic Variables and Related Objects, ed. J. M. Hameury and J. P. Lasota (San Francisco: ASP), in press.
[UCRL-PROC-207445]


Chandra Low Energy Transmission Grating Spectrum of SS Cygni in Outburst
Mauche, C. W.
2004, Ap. J., 610, 422.
[UCRL-JRNL-202490]


A Simple, Unifying Model of the Extreme Ultraviolet Spectra of Dwarf Novae in Outburst
Mauche, C. W.
2004, Rev.Mex.A.A. (Serie de Conferencias), 20, 174.
[proceedings of IAU Coll. No. 194 - Compact Binaries in the Galaxy and Beyond].
[UCRL-PROC-201665]


Optical, UV, and EUV Oscillations of SS Cygni in Outburst
Mauche, C. W.
2004, X-Ray Timing 2003: Rossi and Beyond, ed. P. Kaaret, F. K. Lamb, and J. H. Swank (New York: AIP), 315.
[UCRL-PROC-201584]


The X-ray and Extreme-Ultraviolet Flux Evolution of SS Cygni throughout Outburst
Wheatley, P. J., Mauche, C. W., and Mattei, J. A.
2003, M. N. R. A. S., 345, 49.
[UCRL-JC-152991]


Correlation of the Quasi-Periodic Oscillation Frequencies of White Dwarf, Neutron Star, and Black Hole Binaries
Mauche, C. W.
2002, Ap. J., 580, 423.
[UCRL-JC-148724-DR]


The X-ray Spectra of VY Sculptoris Stars Are Not Blackbodies
Mauche, C. W., and Mukai, K.
2002, Ap. J., 566, L33.
[UCRL-JC-146507]


EUVE Observations of Nonmagnetic Cataclysmic Variables
Mauche, C. W.
2002, in Continuing the Challenge of EUV Astronomy: Current Analysis and Prospects for the Future, ed. S. Howell, J. Dupuis, D. Golombek, and J. Cullison (San Francisco: ASP), 75.
[UCRL-JC-145501]


First Simultaneous Optical and EUV Observations of the Quasi-Coherent Oscillations of SS Cygni
Mauche, C. W., and Robinson, E. L.
2001, Ap. J., 562, 508.
[UCRL-JC-144891]


WZ Sagittae
Wheatley, P. J., Kuulkers, E., Drake, J. J., Kaastra, J. S., Mauche, C. W., Starrfield, S. G., and Wagner, R. M.
2001, IAU Circ., No. 7677.


Optical and EUV Light Curves of Dwarf Nova Outbursts
Mauche, C. W., Mattei, J. A., and Bateson, F. M.
2001, in Evolution of Binary and Multiple Star Systems, ed. Ph. Podsiadlowski, S. Rappaport, A. R. King, F. D'Antona, and L. Burderi (San Francisco: ASP), 367.
[UCRL-JC-141556]


EUVE Observations of OY Carinae in Superoutburst
Mauche, C. W., and Raymond, J. A.
2000, Ap. J., 541, 924.
[UCRL-JC-139298]


RXTE, EUVE, and Optical Observations of SS Cygni in Outburst
Wheatley, P. J., Mauche, C. W., and Mattei, J. A.
2000, in Proceedings of the Brain Warner Symposium, New Astronomy Reviews, 44, P33.


The EUV Emission-Line Spectrum of OY Carinae in Superoutburst: Scattering in the Wind
Mauche, C. W., and Raymond, J. A.
2000, Rev.Mex.A.A. (Serie de Conferencias), 9, 232.
[UCRL-JC-136966]
[proceedings of Astrophysical Plasmas: Codes, Models, and Observations].


The EUV and X-ray Emission of Nonmagnetic Cataclysmic Variables
Mauche, C. W.
1998, in Wild Stars in the Old West: Proccedings of the 13th North American Workshop on Cataclysmic Variables and Related Objects, ed. S. Howell, E. Kuulkers, and C. Woodward (San Francisco: ASP), p. 113.
[UCRL-JC-128488]


The Quasi-Coherent Oscillations of SS Cygni
Mauche, C. W.
1997, in Accretion Phenomena and Related Outflows, ed. D. Wickramasinghe, L. Ferrario, and G. Bicknell (San Francisco: ASP), p. 251.
[UCRL-JC-124946]


The Winds of Cataclysmic Variables
Mauche, C. W., and Raymond, J. C.
1997, in Cosmic Winds and the Heliosphere, ed. J. R. Jokipii, C. P. Sonett, and M. S. Giampapa (Tucson: Univ. of Arizona Press), p. 111.
[UCRL-JC-116941]


X-ray and EUV Spectroscopy of the Boundary Layer Emission of Nonmagnetic Cataclysmic Variables
Mauche, C. W.
1997, in X-ray Imaging and Spectroscopy of Cosmic Hot Plasmas, ed. F. Makino and K. Mitsuda (Tokyo: Universal Academy Press), p. 529.
[UCRL-JC-124145]


Ultraviolet Emission Line Ratios of Cataclysmic Variables
Mauche, C. W., Lee, Y. P., and Kallman, T. R.
1997, Ap. J., 477, 832.
[UCRL-JC-122415]


The EUV Spectrum of the Quasi-Coherent Oscillations of the Dwarf Nova SS Cygni
Mauche, C. W.
1997, Ap. J. (Letters), 476, L85.
[UCRL-JC-124945]


EUVE Observations of U Geminorum in Outburst
Long, K. S., Mauche, C. W., Raymond, J. C., Szkody, P., and Mattei, J. A.
1996, Ap. J., 469, 841.


Quasi-Coherent Oscillations in the Extreme Ultraviolet Flux of the Dwarf Nova SS Cygni
Mauche, C. W.
1996, Ap. J. (Letters), 463, L87.
[UCRL-JC-123090]


Rotating Winds from Accretion Disks in Cataclysmic Variables: Eclipse Modeling of V347 Puppis
Shlosman, I., Vitello, P., and Mauche, C. W.
1996, Ap. J., 461, 377.


EUVE Observations of VW Hydri in Superoutburst
Mauche, C. W.
1996, in Cataclysmic Variables and Related Objects, ed. A. Evans and J. H. Wood (Dordrecht: Kluwer), p. 243.
[UCRL-JC-121827]

EUVE Photometry of SS Cygni: Dwarf Nova Outbursts and Oscillations
Mauche, C. W.
1996, in Astrophysics in the Extreme Ultraviolet, ed. S. Bowyer and R. F. Malina (Dordrecht: Kluwer), p. 317.
[UCRL-JC-120862]

EUVE Observations of the Anomalous 1993 August Outburst of SS Cygni
Mauche, C. W., Raymond, J. C., and Mattei, J. A.
1995, Ap. J., 446, 842.
[UCRL-JC-119310]


EUVE Observations of U Gem
Long, K. S., Mauche, C. W., Szkody, P., and Mattei, J. A.
1995, in Cataclysmic Variables, ed. A. Bianchini, M. della Valle, and M. Orio (Dordrecht: Kluwer), p. 133.

Conclusive Detection of Line Emission in the EUV and X-ray Spectra of Dwarf Novae: First Results from ASCA and EUVE
Mauche, C. W., and Raymond, J. C.
1994, in New Horizon of X-ray Astronomy - First Results from ASCA, ed. F. Makino and T. Ohashi (Tokyo: Universal Academy Press), p. 399.

Winds from Disks in Compact Binaries
Mauche, C. W.
1994, in Interacting Binary Stars, ed. A. W. Shafter (San Francisco: ASP), p. 74.
[UCRL-JC-115464]


Optical, IUE, and ROSAT Observations of the Eclipsing Nova-Like Variable V347 Puppis (LB 1800)
Mauche, C. W., Raymond, J. C., Buckley, D. A. H., Mouchet, M., Bonnell, J., Sullivan, D. J., Bonnet-Bidaud, J.-M., and Bunk, W. H.
1994, Ap. J., 424, 347.
[UCRL-JC-114353]


High-Resolution IUE Spectra of the Novalike Variable IX Velorum
Mauche, C. W.
1991, Ap. J., 373, 624.
[UCRL-JC-105978]


On the X-ray Emitting Boundary Layer of the Dwarf Nova VW Hydri
Mauche, C. W., Wade, R. A., Polidan, R. S., van der Woerd, H., and Paerels, F. B. S.
1991, Ap. J., 372, 659.
[UCRL-JC-106179]


The EUV Emission of Cataclysmic Variables
Raymond, J. C., and Mauche, C. W.
1991, in Extreme Ultraviolet Astronomy, ed. R. F. Malina and S. Bowyer (New York: Pergamon), p. 163.


A Search for EUV Emission from Cataclysmic Variables
Polidan, R. S., and Mauche, C. W.
1991, in Extreme Ultraviolet Astronomy, ed. R. F. Malina and S. Bowyer (New York: Pergamon), p. 177.


A Study of Extreme-Ultraviolet Emission from Cataclysmic Variables
Polidan, R. S., Mauche, C. W., and Wade, R. A.
1990, Ap. J., 356, 211.
[LAUR-89-2972]


A Study of EUV Emission from Cataclysmic Variables
Polidan, R. S., Mauche, C. W., and Wade, R. A.
1990, in Accretion-Powered Compact Binaries, ed. C. W. Mauche (Cambridge: Cambridge Univer. Press), p. 77.

IUE Observations of the Dwarf Nova HL CMa and the Winds of Cataclysmic Variables
Mauche, C. W., and Raymond, J. C.
1987, Ap. J., 323, 690.


IUE Observations of HL CMa and the Winds of Cataclysmic Variables
Mauche, C. W., and Raymond, J. C.
1987, Ap. Sp. Sci., 130, 269.


IUE Spectra of HL CMa and the Winds of Dwarf Novae
Mauche, C. W., and Raymond, J. C.
1985, in Proceedings of the Ninth North American Workshop on Cataclysmic Variables, ed. P. Szkody (Seattle: Univ. of Washington), p. 93.

Models of Cataclysmic Variable Winds
Raymond, J. C., and Mauche, C. W.
1985, in Proceedings of the Ninth North American Workshop on Cataclysmic Variables, ed. P. Szkody (Seattle: Univ. of Washington), p. 128.

Novae	CV Subtypes	Non-Magnetic CVs	Intermediate Polars	Polars
Last modified December 13, 2004
UCRL-MI-135159