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/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

In this work, we investigate the equilibrium figures of a dumb-bell-shapedsequence with which we are still not well acquainted. Studies have shown thatthese elongated and nonconvex figures may realistically replace the classic"Roche binary approximation" for modeling putative peanut-shaped or contactbinary asteroids. The best-fit dumb-bell shapes, combined with the knownrotational period of the objects, provide estimates of the bulk density ofthese objects. This new class of mathematical figures has been successfullytested on the observed light curves of three noteworthy small bodies: main-beltasteroid 216 Kleopatra, Trojan asteroid 624 Hektor and Edgeworth-Kuiper-beltobject 2001 QG298. Using the direct observations of Kleopatra and Hektorobtained with high spatial resolution techniques and fitting the size of thedumb-bell-shaped solutions, we derived new physical characteristics in terms ofequivalent radius and bulk density. In particular, the growing inadequacy ofthe radar shape model for interpreting any type of observations of Kleopatra(light curves, AO images, stellar occultations) in a satisfactory mannersuggests that Kleopatra is more likely to be a dumb-bell-shaped object than a"dog-bone".

Dumb-bell-shaped equilibrium figures for fiducial contact-binary asteroids and EKBOs