English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The eclipsing binary epsilon Aur is unique in being a very long-period binaryinvolving an evolved, variable F star and a suspected B main-sequence starenshrouded in an opaque circumstellar disk. The geometrical arrangement is thatthe disk is viewed almost perfectly edge-on, with alignment leading to apartial eclipse of the F star. Despite a global observing campaign for the2009-11 eclipse, there remain outstanding questions about the nature of thebinary, its components, the disk, and the evolutionary state of the system. Weanalyze optical-band polarimetry in conjunction with broad-band colorvariations to interpret brightness variations across the surface of the F star.We model this both during and after the 1982-84 eclipse for which an extensiveand dense data set exists. We develop a model in terms of surface temperaturevariations characterized by a small global variation overlaid with atemperature variation described with low-order spherical harmonics. While notproviding a detailed fit to the dataset, our modeling captures the overallcharacterization of the color and polarimetric variability. In particular, weare able to recover the gross behavior of the polarimetric excursion in the Q-Uplane as observed during eclipse of the F star when compared to post-eclipsebehavior.

Modeling the Variable Polarization of epsilon Aurigae In and Out of Eclipse