Astronomers at MIT, the University of Liège in Belgium, and elsewhere have discovered a huge, fluffy oddball of a planet orbiting a distant star in our Milky Way galaxy. The […]
Gas Giants
![[L] This plot shows the results for the clone_001-020, which assumes the same initial state of a gas giant and randomly generates planetesimals and embryos based on their distribution, as discussed in Section 2.2. We find that slight differences in the initial state of planetesimals and embryos significantly impact on the resulting planetary systems (indicated by blue dots). However, this influence can be reduced by considering the mean orbit of the planets (represented by gray dots). [R] In this plot, we show results in the absence of a giant planet, with the initial states of planetesimals and planetary embryos randomly generated based on their distribution. The findings depicted in the figure are consistent with the points made in Fig. 4, namely that the total mass and mean position of the formed planets is relatively constant despite the variation in the detailed planetary architectures. Moreover, this plot further underscores that including an outer gas giant leads to a more tightly confined orbit for terrestrial planets formed within its inner boundary, compared with Fig 3. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/05/How-The-Presence-Of-A-Giant.png?resize=1200%2C900&ssl=1)
Posted inAstrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Habitable Zones, Status Report
How The Presence Of A Giant Planet Affects The Outcome Of Terrestrial Planet Formation Simulations
The architecture and masses of planetary systems in the habitable zone could be strongly influenced by outer giant planets, if present.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
Clouds Blanket The Night Side Of The Hot Exoplanet WASP-43b
Using the James Webb Space Telescope (JWST), a team of astronomers, including scientists from MPIA, constructed a global temperature map of the hot, gas giant exoplanet WASP-43b. The nearby parent […]
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Press Release
Webb Maps Weather On Hot Gas-giant Exoplanet WASP-43b
An international team of researchers has successfully used NASA’s James Webb Space Telescope to map the weather on the hot gas-giant exoplanet WASP-43 b.
Posted inAstrogeology, Astronomy & Telescopes, Biosignatures & Paleobiology, Exploration Gear & Tech, Gas Giants, Habitable Zones, Imaging & Spectroscopy, Status Report
TOI-4336 A b: A Temperate Sub-Neptune Ripe For Atmospheric Characterization In A Nearby Triple M-dwarf System
Small planets transiting bright nearby stars are essential to our understanding of the formation and evolution of exoplanetary systems. However, few constitute prime targets for atmospheric characterization, and even fewer […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
Fresh View Of The Hot Brown Dwarf HD 984 B Through High-resolution Spectroscopy
Context. High-resolution spectroscopy has the potential to drive a better understanding of the atmospheric composition, physics, and dynamics of young exoplanets and brown dwarfs, bringing clear insights into the formation […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
CRIRES+ Transmission Spectroscopy of WASP-127b. Detection Of The Resolved Signatures Of A Supersonic Equatorial Jet And Cool Poles In A Hot Planet
General circulation models of gas giant exoplanets predict equatorial jets that drive inhomogeneities across the planetary atmosphere. We studied the transmission spectrum of the hot Jupiter WASP-127b during one transit […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
Mutual Occurrence Ratio of Planets. I. New Clues to Reveal Origins of Hot- and Warm-Jupiter from the RV Sample
Many studies have analyzed planetary occurrence rates and their dependence on the host’s properties to provide clues to planet formation, but few have focused on the mutual occurrence ratio of […]
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
Methane Emission From a Cool Brown Dwarf
Beyond our solar system, aurorae have been inferred from radio observations of isolated brown dwarfs (e.g. Hallinan et al. 2006; Kao et al. 2023). Within our solar system, giant planets […]
![Emblematic direct imaging discoveries (not exhaustive): 2M1207 & AB Pic [24,25], RXJ 1609 [26], κ And [27], HR 8799 [28], β Pic [29], HD 95086 b [30], GJ 504 [31], 51 Eri b [32], HIP 65426 b [33], TYC 8998-760-1 b [34], and b Cen b [35]. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/04/DirectImaging-Of-Exoplanets.png?resize=1200%2C719&ssl=1)
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Status Report, Stellar Cartography, Water/Hycean Worlds & Oceanography
Direct Imaging Of Exoplanets: Legacy And Prospects
Understanding how giant and terrestrial planets form and evolve, what is their internal structure and that of their atmosphere, represents one of the major challenges of modern astronomy, which is […]