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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The periodic eclipses of the pre-main-sequence binary, KH 15D, have beenexplained by a circumbinary dust ring inclined to the orbital plane, whichcauses occultations of the stars as they pass behind the ring edge. We computethe extinction and forward scattering of light by the edge of the dust ring toexplain (1) the gradual slope directly preceding total eclipse, (2) the gradualdecline at the end of ingress, and (3) the slight rise in flux at mid-eclipse.The size of the forward scattering halo indicates that the dust grains have aradius of a ~ 6 (D/3 AU) microns, where D is the distance of the edge of thering from the system barycenter. This dust size estimate agrees well withestimates of the dust grain size from polarimetry, adding to the evidence thatthe ring lies at several AU. Finally, the ratio of the fluxes inside andoutside eclipse independently indicates that the ring lies at a fewastronomical units.

Extending the Model of KH 15D: Estimating the Effects of Forward Scattering and Curvature of the Occulting Ring Edge