[astro-ph.EP] We present mass constraints of two short-period, terrestrial-sized planets transiting K2-223, based on high-precision radial velocity measurements from HARPS-N and ESPRESSO, as well as a tentative indication of an […]
giant planet
![Sunburst diagrams describing the evolution of the inner planets (top) and the outer giant planets (bottom) in the DAG simulations. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Effects-of.png?resize=1200%2C717&ssl=1)
Posted inExoplanets, -moons, -comets
Effects Of Outer Giant Planets On In Situ Formation Of Inner Super-Earths
[astro-ph.EP] Recent studies have found an observational correlation between the presence of outer giant planets and inner super-Earths, which implies that outer giants do not suppress the formation of super-Earths.
Posted inAstrogeology, Exoplanets, -moons, -comets, Gas Giants, Status Report
Formation Of Cold Giant Planets Around Late M Dwarfs Via Core Accretion And The Fate Of Inner Rocky Worlds
Modeling the formation of cold giant planets around M dwarfs is difficult because their disks may not contain enough solids to form massive cores and because forming giants are expected […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Ice Giant, Press Release
Planetesimal Scattering Efficiency Of Cold Giant Planet Architectures
The discovery of many exoplanets has revealed an incredible diversity of orbital architectures.
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Habitable Zones, Ice Giant, Icy Worlds, Imaging & Spectroscopy, Press Release
The Epoch of Giant Planet Migration Planet Search Program. III. The Occurrence Rate of Young Giant Planets Inside the Water Ice Line
We present statistical results from the Epoch of Giant Planet Migration RV planet search program.
Posted inAstronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Exploration Gear & Tech, Gas Giants, Status Report, Stellar Cartography
The TESS-Keck Survey XXIV: Outer Giants May be More Prevalent in the Presence of Inner Small Planets
We present the results of the Distant Giants Survey, a three-year radial velocity (RV) campaign to search for wide-separation giant planets orbiting Sun-like stars known to host an inner transiting […]
![[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.