Astronomy: December 2013 Archives

Finding Pandora and Endor

Sub-Earth-Mass Moon Orbiting a Gas Giant Primary or a High Velocity Planetary System in the Galactic Bulge

"We present the first microlensing candidate for a free-floating exoplanet-exomoon system, MOA-2011-BLG-262, with a primary lens mass of M_host ~ 4 Jupiter masses hosting a sub-Earth mass moon. The data are well fit by this exomoon model, but an alternate star+planet model fits the data almost as well. Nevertheless, these results indicate the potential of microlensing to detect exomoons, albeit ones that are different from the giant planet moons in our solar system. The argument for an exomoon hinges on the system being relatively close to the Sun. The data constrain the product M pi_rel, where M is the lens system mass and pi_rel is the lens-source relative parallax."


Loading

 



Monthly Archives

About this Archive

This page is an archive of entries in the Astronomy category from December 2013.

Astronomy: November 2013 is the previous archive.

Astronomy: January 2014 is the next archive.

Find recent content on the main index or look in the archives to find all content.