Results 11 to 20 of about 366 (77)

Multivariate characterization of hydrogen Balmer emission in cataclysmic variables [PDF]

, 2006
The ratios of hydrogen Balmer emission line intensities in cataclysmic variables are signatures of the physical processes that produce them. To quantify those signatures relative to classifications of cataclysmic variable types, we applied the ...
Adam, Cropper, Duerbeck, Gordon E. Sarty, Kinwah Wu, Shakura, Shaviv, Wu   +7 more
core   +4 more sources

Optical and X-ray Studies of Ten X-ray Selected Cataclysmic Binaries [PDF]

, 2013
We report on ground-based optical observations of ten cataclysmic binaries that were discovered through their X-ray emission. Time-resolved radial velocity spectroscopy yields unambiguous orbital periods for eight objects and ambiguous results for the ...
Halpern, Jules, Thorstensen, John R.
core   +3 more sources

Polarimetry and Spectroscopy of the `Oxygen Flaring' DQ Herculis-like nova: V5668 Sagittarii (2015) [PDF]

, 2017
Classical novae are eruptions on the surface of a white dwarf in a binary system. The material ejected from the white dwarf surface generally forms an axisymmetric shell of gas and dust around the system.
Berdyugin, A, Connor, EGPO, Darnley, MJ, Fitzgerald, KP, Harvey, EJ, Piirola, VE, Redman, MP, Williams, SC   +7 more
core   +3 more sources

The Three Dimensional Structure of EUV Accretion Regions in AM Herculis Stars: Modeling of EUV Photometric and Spectroscopic Observations [PDF]

, 1998
We have developed a model of the high-energy accretion region for magnetic cataclysmic variables and applied it to {\it Extreme Ultraviolet Explorer} observations of 10 AM Herculis type systems.
Bailey J., Bailey J., Beuermann K., Cameron A. G. W., Cropper M. S., Ferrario L., Imamura J. N., King A. R., Kuijpers J., Martin M. Sirk, Mason K. O., Meggitt S. M. A., Ramsay G., Ramsay G., Rosen S. R., Schwope A. D., Schwope A. D., Schwope A. D., Schwope A. D., Steve B. Howell, Stockman H. S., Wickramasinghe D. T., Wickramasinghe D. T., Woelk U., Wu K.   +24 more
core   +3 more sources

The Origin of Soft X-rays in DQ Herculis

, 2003
DQ Herculis (Nova Herculis 1934) is a deeply eclipsing cataclysmic variable containing a magnetic white dwarf primary. The accretion disk is thought to block our line of sight to the white dwarf at all orbital phases due to its extreme inclination angle.
F. A. Ringwald, Herbig G. H., K. Mukai, Lloyd H. M., M. Still, Mewe R., Mewe R., Naylor T., Petitjean P., Slavin A. J., Wood J. H.   +10 more
core   +2 more sources

Hubble Space Telescope Observations of UV Oscillations in WZ Sagittae During the Decline from Outburst [PDF]

, 2003
We present a time series analysis of Hubble Space Telescope observations of WZ Sge obtained in 2001 September, October, November and December as WZ Sge declined from its 2001 July superoutburst.
Boris T. Gänsicke, Christian Knigge, Clemens J. C., Edward M. Sion, Gansicke B. T., Giovannini O., Kepler S. O., Knox S. Long, Lasota J.-P., Meyer F., Meyer-Hofmeister E., Mineshige S., Papaloizou J., Patrick Godon, Paula Szkody, Skidmore W., Smak J., Sparks W. M., van Zyl L., Warner B., Welsh W. F., William F. Welsh   +21 more
core   +2 more sources

1RXSJ062518.2+733433: A bright, soft intermediate polar

, 2003
We present the results of 50 hours time-resolved R-band photometry of the ROSAT all-sky survey source 1RXSJ062518.2+733433. The source was identified by Wei et al. (1999) as a cataclysmic variable.
Hambaryan, V., Krumpe, M., Schwarz, R., Schwope, A. D., Staude, A.   +4 more
core   +2 more sources

Spin-resolved spectroscopy of the intermediate polar DQ Her [PDF]

, 2010
We present high-speed spectroscopic observations of the intermediate polar (IP) DQ Herculis. Doppler tomography of two He I lines reveals a spiral density structure in the accretion disc around the white dwarf (WD) primary.
Bloemen, S., Marsh, T. R., Ostensen, R. H., Steeghs, D.   +3 more
core   +2 more sources

Superhumps in Cataclysmic Binaries. XXIII. V442 Ophiuchi and RX J1643.7+3402

, 2002
We report the results of long observing campaigns on two novalike variables: V442 Ophiuchi and RX J1643.7+3402. These stars have high-excitation spectra, complex line profiles signifying mass loss at particular orbital phases, and similar orbital periods
Berto Monard, Borisov G. V., Brian Martin, Casares J., Darragh O'Donoghue, David A. Harvey, David R. Skillman, de Jager O. C., Dickinson R. J., Edward Beshore, Frank J., Greg Bolt, Iping R. C., Jerry Foote, John R. Thorstensen, Joseph Patterson, Kraicheva Z., Kuijpers J., Lewis M. Cook, Matt Wood, Neil Butterworth, Osaki Y., Panos Niarchos, Pringle J. E., Robert Rea, Robert E. Fried, Smak J., Terquem C., Tonny Vanmunster, Uemura Y., Warner B., Whitehurst R., Wickramasinghe D. T., William H. Fenton, Woelk U.   +34 more
core   +1 more source

Rapid Oscillations in Cataclysmic Variables. XV. HT Camelopardalis (= RX J0757.0+6306)

, 2002
We present photometry and spectroscopy of HT Camelopardalis, a recently discovered X-ray-bright cataclysmic variable. The spectrum shows bright lines of H, He I, and He II, all moving with a period of 0.059712(1) d, which we interpret as the orbital ...
David R. Skillman, Gary Billings, John R. Thorstensen, Jonathan Kemp, Joseph Patterson, Norton A. J., Robert E. Fried, Skillman D. R., Tovmassian G. H.   +8 more
core   +1 more source