NASA finds new hot spot near exoplanet

A NASA team operating the infrared Spitzer Space Telescope has discovered a warm spot in the atmosphere of a ‘hot Jupiter’ exoplanet.

In a new study by the NASA team operating the infrared Spitzer Space Telescope a warm spot has been seen in the atmosphere of a ‘hot Jupiter’ exoplanet.

HT Image

The gas-giant planet, named upsilon Andromedae b, orbits tightly around its star, with one face perpetually boiling under the star’s heat. It belongs to a class of planets termed hot Jupiters, so called for their scorching temperatures and large, gaseous constitutions.

One might think the hottest part of these planets would be directly under the Sun-facing side, but previous observations have shown that their hot spots may be shifted slightly away from this point. Astronomers thought that fierce winds might be pushing hot, gaseous material around.

But the new finding may throw this theory into question. Using Spitzer, an infrared observatory, astronomers found that upsilon Andromedae b’s hot spot is offset by a whopping 80 degrees. Basically, the hot spot is over to the side of the planet instead of directly under the glare of the Sun.

“We really didn’t expect to find a hot spot with such a large offset,” said Ian Crossfield, lead author of a new paper about the discovery appearing in an upcoming issue of Astrophysical Journal. “It’s clear that we understand even less about the atmospheric energetics of hot Jupiters than we thought we did.”