Results 71 to 80 of about 22,677,777 (195)

Polarimetry of exoplanet-exomoon systems

open access: yesAstronomy & Astrophysics
Aims. We investigated the potential of polarimetric observations in the optical wavelength range for the detection of exomoons and the characterization of exoplanet-exomoon systems. Methods. Using the three-dimensional Monte Carlo radiative transfer code POLARIS, we calculated flux and polarization phase curves of Earth-like exoplanets with a satellite
M. B. Michaelis   +2 more
openaire   +2 more sources

Detecting Exoplanet Transits with the Next Generation of X-Ray Telescopes

open access: yesThe Astronomical Journal
Detecting exoplanet transits at X-ray wavelengths would provide a window into the effects of high-energy irradiation on the upper atmospheres of planets.
Raven Cilley   +2 more
doaj   +1 more source

Statistical Distribution Function of Orbital Spacings in Planetary Systems

open access: yesThe Astronomical Journal
The minimum orbital separation of planets in long-stable planetary systems is often modeled as a step function, parameterized with a single value ${{\rm{\Delta }}}_{\min }$ (measured in mutual Hill radius of the two neighboring planets).
Jeremy Dietrich   +2 more
doaj   +1 more source

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

open access: yesAdvanced Optical Materials, Volume 14, Issue 5, 2 February 2026.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova   +5 more
wiley   +1 more source

Spectroscopic Follow-up of Gaia Exoplanet Candidates: Impostor Binary Stars Invade the Gaia DR3 Astrometric Exoplanet Candidates

open access: yesThe Astronomical Journal, 2023
In this paper, we report on the follow-up of six potential exoplanets detected with Gaia astrometry and provide an overview of what is currently known about the nature of the entire Gaia astrometric exoplanet candidate sample, 72 systems in total.
Marcus L. Marcussen, Simon H. Albrecht
doaj   +1 more source

Bridging Clarity and Accuracy: A Simple Spectral Longwave Radiation Scheme for Idealized Climate Modeling

open access: yesJournal of Advances in Modeling Earth Systems, Volume 18, Issue 2, February 2026.
Abstract Parameterizing radiative transfer in climate models means navigating trade‐offs between physical accuracy and conceptual clarity. However, currently available schemes sit at the extremes of this spectrum: correlated‐k schemes are fast and accurate but rely on lookup tables which obscure the underlying physics and make such schemes difficult to
Andrew I. L. Williams
wiley   +1 more source

Using the inclinations of Kepler systems to prioritize new Titius-Bode-based exoplanet predictions [PDF]

open access: yes, 2014
We analyse a sample of multiple-exoplanet systems which contain at least three transiting planets detected by the Kepler mission (‘Kepler multiples’). We use a generalized Titius– Bode relation to predict the periods of 228 additional planets in 151 of ...
Timothy Bovaird   +2 more
semanticscholar   +1 more source

Variability of Known Exoplanet Host Stars Observed by TESS

open access: yesThe Astronomical Journal, 2023
Both direct and indirect methods of exoplanet detection rely upon detailed knowledge of the potential host stars. Such stellar characterization allows for accurate extraction of planetary properties, as well as contributing to our overall understanding ...
Emilie R. Simpson   +5 more
doaj   +1 more source

Sustainable Water Systems in Space: A Review of Current Technologies and Future Prospects

open access: yesWater Resources Research, Volume 62, Issue 2, February 2026.
Abstract Sustainable water management is a critical challenge in space exploration, where the limited availability of resources requires innovative approaches to ensure astronauts' survival on long‐duration missions. This narrative review explores the key technologies and methods involved in water recycling, in situ resource utilization (ISRU), and ...
David Bamidele Olawade   +2 more
wiley   +1 more source

Exoplanet orbital eccentricity: Multiplicity relation and the Solar System [PDF]

open access: yesProceedings of the National Academy of Sciences, 2014
Significance The Solar System planets have near-circular orbits (i.e., unusually low eccentricity) compared with the known population of exoplanets, planets that orbit stars other than the Sun. This fact has been widely interpreted to indicate that the Solar System is an atypical member of the overall population of planetary systems.
Limbach, Mary Anne, Turner, Edwin L.
openaire   +3 more sources

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