Warm Jupiters Have Got Companions

Posted: Jul 15 2016, 1:50am CDT | by , in News | Latest Science News


Warm Jupiters have got Companions
An artist’s portrayal of a Warm Jupiter gas-giant planet (r.) in orbit around its parent star, along with smaller companion planets. Image credit: Detlev Van Ravenswaay/Science Photo Library

After analyzing Kepler space telescope data, astronomers from the University of Toronto, Canada, have found a clear understanding yet of a class of exoplanets called 'Warm Jupiters', showing that many have unexpected planetary companions.

The analysis provides strong evidence of the existence of two distinct types of 'Warm Jupiters', each with their own formation and dynamical history.

The two types include those that have companions and thus, likely formed where we find them today and those with no companions that likely migrated to their current positions.

“Our findings suggest that a big fraction of 'Warm Jupiters' cannot have migrated to their current positions dynamically and that it would be a good idea to consider more seriously that they formed where we find them,” said Chelsea Huang, a Dunlap Fellow at the Dunlap Institute for Astronomy and Astrophysics, University of Toronto.

Warm Jupiters are large, gas-giant exoplanets -- planets found around stars other than the Sun.

They are comparable in size to the gas-giants in our solar system.

But unlike the Sun's family of giant planets, “Warm Jupiters” orbit their parent stars at roughly the same distance that Mercury, Venus and the Earth circle the Sun.

They take 10 to 200 days to complete a single orbit.

Because of their proximity to their parent stars, they are warmer than our system's cold gas giants -- though not as hot as “Hot Jupiters” which are typically closer to their parent stars than Mercury.

Instead of finding "lonely", companion-less “Warm Jupiters”, the team found that 11 of the 27 targets they studied have companions ranging in size from Earth-like to Neptune-like.

“The number of 'Warm Jupiters' with smaller neighbors may be even higher. We may find that more than half have companions,” Huang noted in a paper published in the Astrophysical Journal.

You May Like


The Author

<a href="/latest_stories/all/all/59" rel="author">IANS</a>
The Indo-Asian News Service (IANS) was established in 1986, initially to serve as an information bridge between India and its thriving Diaspora in North America. Now IANS is a full-fledged wire agency, putting out news 24x7 from around the world.




Leave a Comment

Share this Story

Follow Us
Follow I4U News on Twitter
Follow I4U News on Facebook

You Also Like


Read the Latest from I4U News