Results 71 to 80 of about 10,001 (169)
The Effect of Guide Star Variability on PLATO Pointing Stability
The Astronomical JournalThe main science goal of the PLAnetary Transits and Oscillations of stars (PLATO) is to detect and characterize extrasolar planets, including terrestrial planets in the habitable zone (HZ) of their host stars.
Sam Bowling +8 more
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No Thick Atmosphere on the Terrestrial Exoplanet Gl 486b
The Astrophysical Journal LettersA primary science goal for JWST is to detect and characterize the atmospheres of terrestrial planets orbiting M dwarfs (M-Earths). The existence of atmospheres on M-Earths is highly uncertain because their host stars’ extended history of high X-ray and ...
Megan Weiner Mansfield +10 more
doaj +1 more source
Validation of a Third Earth-sized Planet in the TOI-2267 Binary System
The Astronomical JournalWe report the validation of a third terrestrial exoplanet in the nearby (22 pc) TOI-2267 system. TOI-2267 is a binary system with stellar components TOI-2267A (M5, 3030 K) and TOI-2267B (M6, 2930 K), with an on-sky separation of 0 $\mathop{.}\limits ...
Michael Greklek-McKeon +15 more
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Unveiling the Interior Structure and Thermal Evolution of Super-Earth GJ 486b
The Astrophysical JournalRecent ground- and space-based surveys have shown that planets between Earth and Neptune in size, known as “super-Earths,” are among the most frequently found planets in the Galaxy. Although the JWST era has provided high-quality atmospheric data on many
Chandan K. Sahu +3 more
doaj +1 more source
Accelerating Giant-impact Simulations with Machine Learning
The Astrophysical JournalConstraining planet-formation models based on the observed exoplanet population requires generating large samples of synthetic planetary systems, which can be computationally prohibitive.
Caleb Lammers +5 more
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JWST TRAPPIST-1 e/b Program: Motivation and First Observations
The Astronomical JournalOne of the forefront goals in the field of exoplanets is the detection of an atmosphere on a temperate terrestrial exoplanet, and among the best suited systems to do so is TRAPPIST-1.
Natalie H. Allen +26 more
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The Persistent Thermal Anomalies in Rocky Worlds
The Astrophysical JournalObserving the dayside thermal emissions of rocky exoplanets provides essential insights into their compositions and the presence of atmospheres. Even though no conclusive evidence has been found for atmospheres on small rocky exoplanets orbiting M dwarfs,
Zifan Lin, Tansu Daylan
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JWST COMPASS: A NIRSpec G395H Transmission Spectrum of the Super-Earth GJ 357 b
The Astronomical JournalWe present JWST NIRSpec/G395H transmission spectroscopy observations of GJ 357 b, a warm ( T _eq ≈ 525 K) super-Earth (1.2 R _⊕ , 1.84 M _⊕ ) orbiting a nearby M3-type star, with a median precision of 18 ppm and 27 ppm in NRS1 and NRS2, respectively ...
Jea Adams Redai +16 more
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Unraveling the complex inventory of biorelevant organics in the plumes of icy moons. [PDF]
Proc Natl Acad Sci U S A, 2023 Kaiser RI.
europepmc +1 more source
Hot Rocks Survey. V. Secondary Eclipse Photometry of GJ 3473 b with JWST/MIRI
The Astronomical JournalJWST is transforming our ability to characterize small exoplanets, from sub-Neptunes to rocky worlds. A key open question is whether highly irradiated rocky planets can retain atmospheres or are stripped bare by stellar irradiation—a boundary that ...
Måns Holmberg +18 more
doaj +1 more source