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Browsing by Author "Proga, D."
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The evolution of disks and winds in dwarf novae outbursts
Froning, C.S.; Long, K.S.; Drew, J.E.; Knigge, C.; Proga, D.; Mattei, J.A. (2002) -
The evolved B[e] star HD 87643: observations and a radiation-driven disc wind model for B[e] stars
Oudmaijer, R.D.; Proga, D.; Drew, J.E.; de Winter, D. (1998)New high resolution spectroscopic and medium resolution spectropolarimetric data, complemented with optical broad and narrow band imaging, of the B[e] star HD 87643 are presented. The spectrum of HD 87643 exhibits the ... -
FUSE Observations of U Geminorum during Outburst and Decline
Froning, C.S.; Long, K.S.; Drew, J.E.; Knigge, C.; Proga, D. (2001) -
Helium absorption and emission towards Theta^1 ORI C
Oudmaijer, R.D.; Drew, J.E.; Barlow, M.J.; Crawford, I.A.; Proga, D. (1997)The Hei absorption and emission systems towards Theta^1Ori C, the exciting star of the Orion Nebula, are investigated. To this end, high-resolution near-infrared long-slit spectra centred on the Hei 1.083-μm and Brgamma ... -
Line-driven disc wind models with an improved line force
Proga, D.; Stone, J.M.; Drew, J.E. (1999)We describe an efficient method of calculating the radiation pressure due to spectral lines, including all the terms in the velocity gradient tensor. We apply this method to calculate the two-dimensional, time-dependent ... -
Radiation-driven accretion disk winds
Drew, J.E.; Proga, D. (2000)The concept of an ‘effective' Eddington limit as a lower bound on the system luminosity required for mass loss to be radiation pressure driven is discussed and shown to fall in the interesting regime for high-state ... -
A radiation-driven disc wind model for massive young stellar objects
Drew, J.E.; Proga, D.; Stone, J.M. (1998)A radiation-driven disk wind model is proposed that offers great promise of explaining the extreme mass loss signatures of massive young stellar objects (the BN-type objects and more luminous Herbig Be stars). It is argued ... -
Radiation-driven winds from luminous accretion discs
Proga, D.; Stone, J.M.; Drew, J.E. (1998)We study the two-dimensional, time-dependent hydrodynamics of radiation-driven winds from luminous accretion disks in which the radiation force is mediated primar- ily by spectral lines. We assume the disk is flat, Keplerian, ... -
Testing the line-driven disc wind model: time-resolved ultraviolet spectroscopy of IX Vel and V3885 Sgr
Hartley, L.E.; Drew, J.E.; Long, K.S.; Knigge, C.; Proga, D. (2002)