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

Context. J1407 (1SWASP J140747.93-394542.6 in full) is a young star in theScorpius-Centaurus OB association that underwent a series of complex eclipsesover 56 days in 2007. To explain these, it was hypothesised that a secondarysubstellar companion, J1407b, has a giant ring system filling a large fractionof the Hill sphere, causing the eclipses. Observations have not successfullydetected J1407b, but do rule out circular orbits for the companion around theprimary star.  Aims. We test to what degree the ring model of J1407b could survive in aneccentric orbit required to fit the observations.  Methods. We run N-body simulations under the AMUSE framework to test thestability of Hill radius-filling systems where the companion is on an eccentricorbit.  Results. We strongly rule out prograde ring systems and find that a secondaryof 60 to 100MJup with an 11 year orbital period and retrograde orbitingmaterial can survive for at least $10^4$ orbits and produce eclipses withsimilar durations as the observed one.

Constraints on the size and dynamics of the J1407b ring system