The Rossiter-McLaughlin Effect in the Eclipsing Binary System V1143 Cyg -- First Results

Details The Rossiter-McLaughlin Effect in the Eclipsing Binary System V1143 Cyg -- First Results The Rossiter-McLaughlin Effect in the Eclipsing Binary System V1143 Cyg -- First Results

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..370..218a&link_type=abstract

Solar and Stellar Physics Through Eclipses ASP Conference Series, Vol. 370, proceedings of the conference held 27-29 March, 2006

Physics

1

Scientific paper

The high eccentricity eclipsing binary V1143 Cyg is of particular interest because the observed apsidal motion differs from the theoretical prediction. This difference might be explained by misalignment of the rotation axes of the stars relative to each other and/or the overall angular momentum of the system.
We have observed the rotation effect (Rossiter-McLaughlin effect) during the primary and secondary eclipses in the binary system V1143 Cyg using the Hamilton high-resolution spectrograph at Lick Observatory, which, when supplemented with spectra taken out of eclipse, enables us to derive information on the orientation of the rotation axes. Here we present first results of our analysis of the system and show that we have found no evidence for a misalignment of the stellar rotation axes.

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