Direct determination of rapid stellar rotation effects by long baseline interferometry

Details Direct determination of rapid stellar rotation effects by long baseline interferometry Direct determination of rapid stellar rotation effects by long baseline interferometry

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001sf2a.conf..201d&link_type=abstract

Abstracts from SF2A-2001: Semaine de l'Astrophysique Francaise, meeting held in Lyon, France, May 28-June 1st, 2001, Eds.: F. Co

Physics

Scientific paper

Studying rapidly rotating stars reveal important information about stellar physics. Fast rotation is expected to affect stellar shapes, polarizations, temperature, gravity and brightness distribution, etc. Since stellar interferometry is a technique specially sensitive to sky projected shapes and brightness distributions, it allows a direct determination of geometrical deformation and gravity darkening induced by rotation. We present a quantitative study on the expected rapid rotation signatures on interferometric observables (modulus and phase of monochromatic fringe visibilities) showing that operating (like the GI2T) and near-operating (like the VLTI) interferometers can attain the required precisions.

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