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Астронет: Астрономическая картинка дня Температура на экзопланете WASP-43b http://variable-stars.ru/db/msg/1928693/eng |
Credit & Copyright: Taylor Bell (BAERI),
Joanna Barstow (The Open University),
Michael Roman (University of Leicester)
Explanation:
A mere 280 light-years
from Earth,
tidally locked, Jupiter-sized exoplanet WASP-43b
orbits its parent star once every 0.8 Earth days.
That puts it about 2 million kilometers
(less than 1/25th the orbital distance of Mercury)
from a small, cool sun.
Still, on a dayside always facing its parent star, temperatures
approach a torrid 2,500 degrees F as measured at
infrared
wavelengths by the MIRI
instrument on board the James Webb Space Telescope.
In
this illustration
of the hot exoplanet's orbit, Webb
measurements also show nightside temperatures remain above 1,000 degrees F.
That suggests that strong equatorial
winds circulate the dayside
atmospheric gases to the nightside before they can completely cool off.
Exoplanet WASP-43b is now
formally known as
Astrolцbos, and its K-type parent star has been christened Gnomon.
Webb's infrared spectra
indicate water vapor is present on the nightside as well as
the dayside of the planet, providing information about
cloud
cover on Astrolцbos.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.