Hot Jupiters generally do not have nearby planet companions, as they may have cleared out other planets during their inward migration from more distant orbits.
gas giant
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Status Report
9 New M Dwarf Planet Candidates From TESS Including 5 Gas Giants
We present the detection of 9 new planet candidates orbiting M dwarfs, identified using an independent search and vetting pipeline applied to TESS Full-Frame Image (FFI) data from Sectors 1 […]
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Beta Pictoris, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
JWST-TST High Contrast: JWST/NIRCam Observations Of The Young Giant Planet β Pic b
We present the first JWST/NIRCam observations of the directly-imaged gas giant exoplanet β Pic b. Observations in six filters using NIRCam’s round coronagraphic masks provide a high signal-to-noise detection of […]
![Mass–radius diagram of confirmed exoplanets with mass and radius precision better than 3σ and 10σ, respectively. Planetary parameters (black dots) are taken from the NASA Exoplanet Archive (https://exoplanetarchive.ipac.caltech.edu), and updated to October 2023. HD 73344b is represented by the red dot. The red arrow represents the upper 10σ limit on its mass. Composition models calculated from Aguichine et al. (2021) with a core mass fraction of 30% and various H2O mass fraction (from 10% to 80%) are represented by coloured lines (see text). Composition models calculated from Lopez & Fortney (2014) for a 1 Gyr-old system, Teq,b ∼ 900 K, and an envelope mass fraction fenv = [1, 2, 3, 4, 5] % are shown in gray. For comparison, the relation for an Earth-like composition (32.5% core, 67.5% mantle) from Brugger et al. (2017) is shown by the green dashed curve, and some solar system planets (Venus, the Earth, Uranus and Neptune) are displayed. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/05/A-Low-mass-Sub-Neptune-Planet.png?resize=1200%2C719&ssl=1)
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
A Low-mass Sub-Neptune Planet Transiting The Bright Active Star HD 73344
Context. Planets with radii of between 2-4 RE closely orbiting solar-type stars are of significant importance for studying the transition from rocky to giant planets.
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
Webb Studies Inflated Exoplanet WASP-107 b
Why is the warm gas-giant exoplanet WASP-107 b so puffy? Two independent teams of researchers have an answer.
Posted inAstrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Press Release
Astronomers Spot WASP-193b – A Giant Planet As Light As Cotton Candy
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 […]
![[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 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 […]