Home » News & Blogs » Rings around Warm Exoplanets
Bookmark and Share
Beyond Earthly Skies

Rings around Warm Exoplanets

6 Oct 2013, 10:00 UTC
Rings around Warm Exoplanets
(200 words excerpt, click title or image to see full post)

Ring systems exist around all of the giant planets in our solar system - Jupiter, Saturn, Uranus and Neptune. The rings around Saturn are the most prominent and consist primarily of centimetre-sized to meter-sized icy bodies. Since ring systems are ubiquitous around the giant planets in our solar system, they are also expected to exist around extrasolar planets.In a paper by Schlichting & Chang (2011), the authors investigate the types of rings systems that could exist around extrasolar planets that orbit much closer to their host stars than the giant planets in our solar system. The focus is on extrasolar planets located at distances of one AU or less from their host stars. The authors coin such extrasolar planets, if they harbour ring systems, “warm Saturns,” since they exist close enough to their host stars where temperatures are too high for water and other volatiles to exist as solid ice grains. Instead, such planetary ring systems can only consist primarily of rocky materials and will differ from those in our solar system.Artist’s impression of a gas giant planet with a ring system around it. Credit: Gabriel Gajdos.In our solar system, Poynting-Robertson drag is not important for Saturn’s rings due to ...

Latest Vodcast

Latest Podcast

Advertise PTTU

NASA Picture of the Day

Astronomy Picture of the Day