Results 41 to 50 of about 182,451 (170)
The stability of short-period extrasolar giant planets [PDF]
, 2008 A three-dimensional coupled thermosphere-ionosphere model for extrasolar giant planets (EXOTIM) has been developed. This is the first such model reported in the literature.
Koskinen, T.T.
core
Early Results from the HUMDRUM Survey: A Small, Earth-mass Planet Orbits TOI-1450A
The Astronomical JournalM-dwarf stars provide us with an ideal opportunity to study nearby small planets. The HUnting for M Dwarf Rocky planets Using MAROON-X (HUMDRUM) survey uses the MAROON-X spectrograph, which is ideally suited to studying these stars, to measure precise ...
Madison Brady +25 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 GJ 367 is a bright ( V ≈ 10.2) M1 V star that has been recently found to host a transiting ultra-short period sub-Earth on a 7.7 hr orbit. With the aim of improving the planetary mass and radius and unveiling the inner architecture of the system, we ...
Elisa Goffo +40 more
doaj +1 more source
Earth's Alfvén Wings Driven by the April 2023 Coronal Mass Ejection
Geophysical Research Letters, Volume 51, Issue 14, 28 July 2024.Abstract We report a rare regime of Earth's magnetosphere interaction with sub‐Alfvénic solar wind in which the windsock‐like magnetosphere transforms into one with Alfvén wings. In the magnetic cloud of a Coronal Mass Ejection (CME) on 24 April 2023, NASA's Magnetospheric Multiscale mission distinguishes the following features: (a) unshocked and ...
Li‐Jen Chen +35 more
wiley +1 more source
Mitigating Worst-case Exozodiacal Dust Structure in High-contrast Images of Earth-like Exoplanets
The Astronomical Journal, 2023 Detecting Earth-like exoplanets in direct images of nearby Sun-like systems brings a unique set of challenges that must be addressed in the early phases of designing a space-based direct imaging mission.
Miles H. Currie +4 more
doaj +1 more source
Electrical Conductivity of Dense MgSiO3 Melt Under Static Compression
Geophysical Research Letters, Volume 51, Issue 12, 28 June 2024.Abstract The magnetic fields of terrestrial planets are created by core convection. Molten silicate mantles could also generate magnetic fields through their convective motion, known as a silicate dynamo. Recent computational studies have suggested that silicate melts may exhibit high electrical conductivity (EC) at temperatures above 4000 K due to ...
Yoshiyuki Okuda +4 more
wiley +1 more source
Thermal Equation of State of Cubic Silicon Carbide at High Pressures
ChemPhysChem, Volume 25, Issue 9, May 2, 2024.The thermoelastic properties of SiC with a zinc‐blende crystal structure are experimentally determined. Previous experimental studies contained errors due to significant uncertainties of measured pressures and temperatures and unreleased residual stresses.
Artem Chanyshev +11 more
wiley +1 more source
Two Extrasolar Planets from the Anglo‐Australian Planet Search
, 2002 We report the detection of two new extrasolar planets from the Anglo-Australian Planet Search around the stars HD 142 and HD 23079. The planet orbiting HD 142 has an orbital period of just under 1 yr, while that orbiting HD 23079 has a period of just ...
C. G. Tinney +13 more
core +1 more source
LHS 475 b: A Potential Venus Analog Orbiting a Nearby M Dwarf
The Astronomical JournalBased on photometric observations by TESS, we present the discovery of a potential Venus analog transiting LHS 475, an M3 dwarf located 12.5 pc from the Sun. The mass of the star is 0.274 ± 0.015 M _☉ .
Kristo Ment +17 more
doaj +1 more source
Journal of Geophysical Research: Planets, Volume 129, Issue 3, March 2024.Abstract Toroidal atmospheres and exospheres characterized at exoplanets may be fueled by volcanically active exomoons, often referred to as exo‐Ios. We study the neutral outgassing and volatile evolution of a close‐orbiting, evaporating satellite at eight candidate exoplanet‐exomoon systems WASP‐49,‐96,‐69,‐17 b, XO‐2N b, HAT‐P‐1 b, HD‐189733 b, and ...
M. Meyer zu Westram, A. V. Oza, A. Galli
wiley +1 more source