Polarimetry of Epsilon Aurigae: Initial Observations of the 2009-2011 Eclipse

Details Polarimetry of Epsilon Aurigae: Initial Observations of the 2009-2011 Eclipse Polarimetry of Epsilon Aurigae: Initial Observations of the 2009-2011 Eclipse

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012jsara...5...51b&link_type=abstract

Journal of the Southeastern Association for Research in Astronomy, vol. 5, p. 51-55

Astronomy and Astrophysics

Astronomy

Polarization, Stars: Eclipsing Binaries, Methods: Observational, Techniques: Polarimetry

Scientific paper

Epsilon Aurigae is an eclipsing binary system consisting of an F0 supergiant (200 R&sun;) and a cool, opaque edge-on disk (2000 R&sun;) possibly encompassing a second star. V-band polarimetry data for Epsilon Aurigae's 2009-2011 eclipse is being obtained to better understand the system's geometry and the nature of its two components. Several polarized and non-polarized standard stars are also being observed in order to characterize the instrumental polarization and sources of measurement error in the polarimeter configuration and the measurement procedures for observations. We report here on the status of these observations at the midpoint of the eclipse and include a preliminary analysis of noise and instrumental effects in the measurements.

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