Cataclysmic Variable Disk Winds: a high time- and spectral resolution study of flow inhomogeneity

Details Cataclysmic Variable Disk Winds: a high time- and spectral resolution study of flow inhomogeneity Cataclysmic Variable Disk Winds: a high time- and spectral resolution study of flow inhomogeneity

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8279d&link_type=abstract

HST Proposal ID #8279

Astronomy and Astrophysics

Astrophysics

Hst Proposal Id #8279 Stellar Ejecta

Scientific paper

Disks and disk winds are found in many astrophysical settings. While much effort has been invested in models for centrifugal MHD disk winds over the past decade or so, only within the past year has the modelling of radiation-driven disk winds developed to the point of generating predictions. This proposed programme of time-resolved UV STIS/E140M observations of the high-state non-magnetic cataclysmic variables {hNCV}, IX Vel, V3885 Sgr, and QU Car, will explore a striking prediction of the line-driven wind simulations by Proga et al {1998}. These have shown that unsteady, clumped outflow is to be expected where most of the driving luminosity is produced by the disk rather than the central star - a circumstance believed to apply in hNCV. This programme will identify such clumping as narrow absorption features, first appearing at low outflow velocities, superposed on UV wind-formed spectral line profiles. In addition, these winds, if line-driven, are likely at higher proje cted outflow velocities to prompt further moving narrow absorption components analogous to those well- known in OB stellar spectra. Flow times are so short { 50 sec} in these compact binaries that time-tagged HST/STIS observation is the only option. Observing 3 targets at 3 epochs will both confront theory directly and yield insights into the systematic trends needed to build our understanding of line-driven disk winds.

Affiliated with

Also associated with

No associations

Rating

Cataclysmic Variable Disk Winds: a high time- and spectral resolution study of flow inhomogeneity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cataclysmic Variable Disk Winds: a high time- and spectral resolution study of flow inhomogeneity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cataclysmic Variable Disk Winds: a high time- and spectral resolution study of flow inhomogeneity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-993082