Doppler imaging of stellar surface structure

Doppler imaging of stellar surface structure

We present a time series of Doppler images of the RS CVn binary V711 Tauri from spectra taken during 57 consecutive nights in November and December 1996. VRI-band APT photometry throughout the entire observing season is used to support the Doppler imaging. A set of altogether 37 overlapping images from the Ca i-6439 line allows us to trace the latitudinal and longitudinal migration of individua...

Stellar Surface Imaging Using Closure Phase

We describe the use of interferometry to make images of features on the surfaces of cool stars. We describe observations of Betelgeuse (α Ori) and use this example to illustrate the requirements for astrophysical imaging with interferometers. We emphasise the importance of obtaining closure phase measurements and good Fourier plane coverage when imaging complex objects.

I-44: Color Doppler Imaging in Impotence

Sexual impotent is very common entity and define as inability to induce or maintaining penile erection during sexual intercourse. Studies reveals about 10% of men aged 40-70 years have complete, 17% have mild and 25% have moderate amount of erectile dysfunction. The sexual impotence has different etiology including psychogenic, neurogenic, arteriogenic and venogenic causes. Current studies reve...

HF Doppler Acoustic Imaging of the Ocean Surface and Interior

HF phased array Doppler sonar represents a new tool for obtaining Threedimensional (r,q,t) images of the oceanic surface and interior velocity field. While the capabilities of the approach are unique, the design constraints are also unusual. Examples of both are presented in this work.

Stellar Structure and Evolution