Results 21 to 30 of about 174 (88)

Superhabitable Planets Around Mid‐Type K Dwarf Stars Enhance Simulated JWST Observability and Surface Habitability

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT In our search for life beyond the Solar System, certain planetary bodies may be more conducive to life than Earth. However, the observability of these “superhabitable” (SH) planets in the habitable zones around K dwarf stars has not been fully modeled. This study addresses this gap by modeling the atmospheres of SH exoplanets.
Iva Vilović, Jayesh Goyal, René Heller, Fanny Marie von Schauenburg   +3 more
wiley   +1 more source

Mid-infrared Imaging of SR 12 c with JWST/MIRI: Grain Growth in an Evolved Circumplanetary Disk

The Astrophysical Journal
The physical properties of circumplanetary disks offer insights into the formation of giant planets and their satellites. The circumbinary planetary-mass companion SR 12 c (1200 au from SR 12 AB) hosts an isolated dust disk directly detected with ALMA ...
Ya-Lin Wu, Claire O. Finley, Brendan P. Bowler, Ning Chen, Yuhiko Aoyama, Gregory J. Herczeg, Catherine C. Espaillat, William Best, Ian Czekala, Katherine B. Follette, Adam L. Kraus, Raquel A. Martinez, Connor E. Robinson, Quang H. Tran, Kimberly Ward-Duong, Yifan Zhou   +15 more
doaj   +1 more source

The Process We Call Earth: Relationships Between Dynamic Feedbacks and the Search for Gaiasignatures in a New Paradigm of Earthlikeness

Perspectives of Earth and Space Scientists, Volume 5, Issue 1, December 2024.
Abstract Standard notions of an “Earthlike” planet rely solely on physical and material properties, like planetary mass, radius, and surface temperature. Here, we introduce a novel, relational perspective on what defines “Earthlikeness.” In our process‐based framework, rocky planets are local pockets of free energy that have the potential to drive the ...
Michael L. Wong, Marissa Duckett, Emilia S. Hernandez, Vahab Rajaei, Kayla J. Smith   +4 more
wiley   +1 more source

Comparative terrestrial atmospheric circulation regimes in simplified global circulation models. Part I: From cyclostrophic super‐rotation to geostrophic turbulence

Quarterly Journal of the Royal Meteorological Society, Volume 144, Issue 717, Page 2537-2557, October 2018 Part B., 2018
The regimes of global atmospheric circulation patterns in an Earth‐like atmosphere are explored as a function of rotation rate Ω, thermal contrast, and other parameters expressed in dimensionless form, using a simplified GCM based on the University of Hamburg's Portable University Model for the Atmosphere.
Yixiong Wang, Peter L. Read, Fachreddin Tabataba‐Vakili, Roland M. B. Young   +3 more
wiley   +1 more source

Possibility of Detection of Exomoons with Inclined Orbits Orbiting Pulsar Planets Using the Time‐of‐Arrival Analysis

Advances in Astronomy, Volume 2014, Issue 1, 2014., 2014
The perturbation caused by planet‐moon binarity on the time‐of‐arrival (TOA) signal of a pulsar with an orbiting planet is derived for the case of the orbit of the planet‐moon system inclined of an angle α with respect to the plane of the orbit of the planet‐moon barycenter around the pulsar.
Antonio Pasqua, Khudhair A. Assaf, Gary Wegner   +2 more
wiley   +1 more source

Planet–Planet Scattering Explains the Mass–Eccentricity Relation of Warm Jupiters

The Astrophysical Journal Letters
Warm Jupiters—giant planets with orbital periods of ∼10–365 days—exhibit a positive correlation between mass and eccentricity. We interpret this trend as the outcome of planet–planet scattering, representing a transition from collision-dominated ...
Jiayin Dong, Eve J. Lee, Eiichiro Kokubo, Ruth Murray-Clay, Arvind Gupta, Gavin Turner   +5 more
doaj   +1 more source

Knudsen effusion mass spectrometry: Current and future approaches

Rapid Communications in Mass Spectrometry, Volume 38, Issue 14, 30 July 2024.
Rationale Knudsen effusion mass spectrometry (KEMS) has been a powerful tool in physical chemistry since 1954. There are many excellent reviews of the basic principles of KEMS in the literature. In this review, we focus on the current status and potential growth areas for this instrumental technique.
Nathan S. Jacobson, Jean‐Yves Colle, Valentina Stolyarova, Torsten Markus, Ioana Nuta   +4 more
wiley   +1 more source

Direct Imaging Constraints on Binary Planets and Exomoons around Epsilon Indi A b

The Astronomical Journal
Epsilon Indi A b (hereafter Eps Ind A b) is a directly imaged ∼6 M _Jup exoplanet orbiting a nearby (3.6 pc) K dwarf at ∼30 au. We analyze archival JWST/MIRI 15 μ m coronagraphic imaging of this planet to search for directly imaged satellites orbiting ...
Matson C. Garza, Mary Anne Limbach, Rachel Bowens-Rubin, Matthew De Furio, Elisabeth C. Matthews, Kyle Franson, Sarah C. Millholland, Logan A. Pearce, Andrew Vanderburg   +8 more
doaj   +1 more source

A Self‐Consistent Model of Radial Transport in the Magnetodisks of Gas Giants Including Interhemispheric Asymmetries

Journal of Geophysical Research: Space Physics, Volume 129, Issue 4, April 2024.
Abstract Outward transport of plasma in the inner and middle magnetospheres of gas giants results from an interplay between mass loading from the inner dominant mass sources (volcanic moons), flux tube interchange in the centrifugally unstable magnetospheric plasma disk, turbulent heating of the plasma, and coupling between the equatorial plasma and ...
Marie Devinat, Michel Blanc, Nicolas André   +2 more
wiley   +1 more source

On the Exoplanet Yield of Gaia Astrometry

The Astronomical Journal
We reexamine the expected yield of Gaia astrometric planet detections using updated models for giant-planet occurrence, the local stellar population, and Gaia’s demonstrated astrometric precision. Our analysis combines a semianalytic model that clarifies
Caleb Lammers, Joshua N. Winn
doaj   +1 more source