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DTSTART;VALUE=DATE:20231115
DTEND;VALUE=DATE:20231116
DTSTAMP:20231117T112626Z
CREATED:20231117T085802Z
LAST-MODIFIED:20231117T112626Z
UID:98701-1700006400-1700092799@www.a3veen.nl
SUMMARY:WASP-107b / SO2\, silicate clouds\, but no CH4 detected in a warm Neptune - publication
DESCRIPTION:WASP-107b is a super-Neptune exoplanet that orbits the star WASP-107. It lies 200 light-years away from Earth in the constellation Virgo\, its discovery was announced in 2017 by a team led by D. R. Anderson via the WASP-South. \nWASP-107b could not have formed in its current orbit. It likely migrated inward from its birth orbit beyond 1 AU due to interaction with the heavier planet WASP-107c. WASP-107b is in a retrograde orbit\, strongly misaligned with the equatorial plane of the parent star. The misalignment angle is equal to 118°+38 −19. WASP-107c follows a highly eccentric and inclined orbit with a period of 1088+15 −16 days. WASP-107b is a super-Neptune ice giant exoplanet located 200 light years away from Earth in the constellation Virgo. It is roughly the size of Jupiter but less than one-tenth of Jupiter’s mass\, making it one of the lowest density exoplanets. Its radius is 0.96±0.03 times Jupiter’s\, making its atmosphere fluffy\, and coupled with transiting a moderately bright K-type star\, makes it a target for atmospheric characterization. It is eight times nearer to its star than Mercury is to the Sun and orbits its star every 5.7 days. With a temperature of 773K / 500 °C\, its atmosphere makes it one of the hottest known exoplanets. Helium was discovered in the planet’s atmosphere in 2018\, making it the first time helium was discovered on an exoplanet. A follow-up observation with Keck in 2020 showed that the helium absorption extends beyond transit-egress. Extreme ultraviolet radiation from the host star is gradually whittling down the planet’s atmosphere\, forming a comet-like tail 7 times as long as the radius of the planet. \nA transmission spectrum of the warm Neptune exoplanet WASP-107b\, captured by the Low Resolution Spectrometer (LRS) of the Mid InfraRed Instrument (MIRI) on board JWST\, reveals evidence for water vapor\, sulfur dioxide\, and silicate (sand) clouds in the planet’s atmosphere. Credit: Michiel Min / European MIRI EXO GTO team / ESA / NASA\nWhile the James Webb Space Telescope (JWST or Webb) may spend a lot of its time observing the farthest reaches of the early universe when galaxies were only just starting to form\, it also spends plenty of its time focused on objects a lot closer to home — such as the atmospheres of exoplanets in our galactic neighborhood. A team of European astronomers\, co-led by researchers from the KU Leuven Institute of Astronomy\, used observations from the JWST to detail the atmospheric composition of the exoplanet WASP-107b. The researchers found water vapor\, sulfur dioxide and even silicate sand clouds residing within the exoplanet’s dynamic atmosphere. The study ‘SO2\, silicate clouds\, but no CH4 detected in a warm Neptune‘ may also have implications for our understanding of the chemistry of distant planets. \n \n\nLinks:\nJames Webb Space Telescope reveals sandy surprise in distant planet \nOp ‘suikerspinplaneet’ WASP-107b blijkt het ook te regenen\, alleen valt daarbij geen water\, maar zand uit de lucht \nWetenschappers van KU Leuven ontdekken zandwolken op exoplaneet WASP-107b: “Wetenschappelijke mijlpaal” \nAlien Atmosphere: Webb Detects Water Vapor\, Sulfur Dioxide and Sand Clouds in Nearby Exoplanet
URL:https://www.a3veen.nl/event/wasp-107b-so2-silicate-clouds-but-no-ch4-detected-in-a-warm-neptune-publication/
CATEGORIES:Astronomie,Exoplaneet
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