Zellem, Robert, Hollon, Nicholas, Ballouz, Ronald-Louis, Sion, Edward M., Godon, Patrick, Gänsicke, Boris T., ...
We obtained Hubble STIS spectra of three nova-like variables: V751 Cygni, V380 Oph, and - the only confirmed nova-like variable known to be below the period gap - BK Lyn. In all three systems, the...
V3885 Sagittarius: a Comparison with a Range of Standard Model Accretion Disks (2009)
Linnell, Albert P., Godon, Patrick, Hubeny, Ivan, Sion, Edward M., Szkody, Paula, Barrett, Paul E.
A $\widetilde{\chi}^2$ analysis of standard model accretion disk synthetic spectrum fits to combined $FUSE$ and STIS spectra of V3885 Sagittarius, on an absolute flux basis, selects a model that...
Modeling UX Ursae Majoris: An abundance of challenges (2008)
Linnell, Albert P., Godon, Patrick, Hubeny, Ivan, Sion, Edward M., Szkody, Paula
We present a system model for optical and far UV spectra of the nova-like variable UX UMa involving a white dwarf, secondary star, gas stream, hot spot and accretion disk using our code BINSYN and...
Synthetic Spectrum Constraints on a Model of the Cataclysmic Variable QU Carinae (2008)
Linnell, Albert P., Godon, Patrick, Hubeny, Ivan, Sion, Edward M., Szkody, Paula, Barrett, Paul E.
Neither standard model SEDs nor truncated standard model SEDs fit observed spectra of QU Carinae with acceptable accuracy over the range 900\AA to 3000\AA. Non-standard model SEDs fit the observation...
.1 Simulations of Jet Production in Magnetized Accretion (2007)
Disk Coronae, David L. Meier, Samantha Edgington, Patrick Godon, David G. Payne, Kevin R. Lind
Abstract. We describe the results of over 40 MHD simulations, performed on Caltech/JPL parallel supercomputers, of the coronae of magnetized accretion disks around compact objects. All produce some...
Simulations of the Boundary Layer Between a White Dwarf and its Accretion Disk (2007)
Balsara, Dinshaw S., Fisker, Jacob Lund, Godon, Patrick, Sion, Edward M.
Using a 2.5D time-dependent axisymmetric numerical code we recently developed, we solve the full compressible Navier-Stokes equations (including an alpha-viscosity prescription) to determine the...
FUSE Observations of the Dwarf Novae UU Aql, BV Cen, and CH UMa in Quiescence (2007)
Sion, Edward M., Godon, Patrick, Cheng, Fuhua, Szkody, Paula
We report on FUSE spectra of three U Gem-type, long period, dwarf novae, UU Aql, BV Cen and CH UMa taken during their quiescence intervals. We discuss the line identifications in their spectra and...
A Synthetic Spectrum and Light Curve Analysis of the Cataclysmic Variable IX Velorum (2006)
Linnell, Albert P., Godon, Patrick, Hubeny, Ivan, Sion, Edward M., Szkody, Paula
Spectrum synthesis analysis of FUSE and STIS spectra of the cataclysmic variable IX Velorum successfully produces a system model. Light synthesis analysis of K band photometry shows that the...
Hot Boundary Layers in Symbiotic Binaries AX Persei and CI Cygni (2004)
Symbiotic systems are long period binaries in which a white dwarf usually
Advection in Accretion Discs Boundary Layers (2004)
Accretion disc boundary layer models have been calculated for various systems, using a one dimensional time dependent numerical code.
Simulations of Jet Production in Magnetized Accretion Disk Coronae (2004)
Meier, David L., Edgington, Samantha, Lind, Kevin R., Godon, Patrick
We describe the results of over 40 MHD simulations, performed on Caltech/JPL parallel supercomputers, of the coronae of magnetized accretion disks around compact objects.
The boundary layer of VW Hyi in quiescence (2004)
Godon, Patrick, Sion, Edward M.
In this letter, we suggest that the missing boundary layer luminosity of dwarf novae in quiescence is released mainly in the ultraviolet (UV) as the second component commonly identified in the far...
Far Ultraviolet Observations of the Dwarf Nova VW Hyi in Quiescence (2004)
Godon, Patrick, Sion, Edward M., Cheng, Fu-Hua, Szkody, Paula, Long, Knox S., Froning, Cynthia S.
We present a 904-1183 A spectrum of the dwarf nova VW Hydri taken with the Far Ultraviolet Spectroscopic Explorer during quiescence, eleven days after a normal outburst, when the underlying white...
The Formation and Role of Vortices in Protoplanetary Disks (1999)
We carry out a two-dimensional, compressible, simulation of a disk, including dust particles, to study the formation and role of vortices in protoplanetary disks. We find that anticyclonic vortices...
Vortices in Protoplanetary Disks (1999)
We use a high order accuracy spectral code to carry out two-dimensional time-dependent numerical simulations of vortices in accretion disks. In particular, we examine the stability and the life time...
On the non-linear hydrodynamic stability of thin Keplerian disks (1998)
The non-linear hydrodynamic stability of thin, compressible, Keplerian disks is studied on the large two-dimensional compressible scale, using a high-order accuracy spectral method. We show that...