Results 91 to 100 of about 3,279 (221)

Confirmation of a Non‐Transiting Planet in the Habitable Zone of the Nearby M Dwarf L 98‐59

Astronomische Nachrichten, Volume 347, Issue 2, February 2026.
ABSTRACT Only 40 exoplanetary systems with five or more planets are currently known. These systems are crucial for our understanding of planet formation and planet‐planet interaction. The M dwarf L 98‐59 has previously been found to show evidence of five planets, three of which are transiting.
Paul I. Schwarz, Stefan Dreizler, René Heller   +2 more
wiley   +1 more source

Amplifying Resonant Repulsion with Inflated Young Planets, Overlooked Inner Planets, and Nonzero Initial Δ

The Astrophysical Journal
Most multiplanet systems around mature (∼5 Gyr old) host stars are nonresonant. Even the near-resonant planet pairs still display 1%–2% positive deviation from perfect period commensurabilities (Δ) near first-order mean motion resonances (MMRs). Resonant
Yuancheng Xu, Fei Dai
doaj   +1 more source

Commissioning an Inexpensive Off‐The‐Shelf Spectrograph for Radial‐Velocity Studies

Astronomische Nachrichten, Volume 347, Issue 2, February 2026.
ABSTRACT We present a way to set up an inexpensive out of the shelf spectrograph at a local observatory. Stability and resolution of the spectrograph are high enough for radial velocity determination of binary stars or determination of stellar characteristics. Even some exoplanets might be detectable via the radial velocity method.
Lukas Stock, Andreas Schrimpf
wiley   +1 more source

On the feasibility of exomoon detection via exoplanet phase curve spectral contrast

, 2017
The author gratefully acknowledges support from the ECOGAL project, grant agreement 291227, funded by the European Research Council under ERC-2011-ADG.An exoplanet-exomoon system presents a superposition of phase curves to observers - the dominant ...
Forgan, D. H., D. H. Forgan
core   +1 more source

Friends Not Foes: Strong Correlation between Inner Super-Earths and Outer Gas Giants

The Astrophysical Journal Letters
The connection between outer gas giants and inner super-Earths reflects their formation and evolutionary histories. Past work exploring this link has suggested a tentative positive correlation between these two populations, but these studies have been ...
Marta L. Bryan, Eve J. Lee
doaj   +1 more source

Galactic Cosmic Ray Ionization on Uranus; Geomagnetic Latitude Dependencies

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Galactic Cosmic Rays (GCRs) are a major source of atmospheric ionization, influencing ion abundance, aerosol formation, and electrical processes. GCR‐induced effects are expected to be more pronounced on Uranus than planets closer to the Sun for two reasons; reduced solar irradiance, and weaker solar modulation of incident GCR.
Ola Al‐Khuraybi, Karen L. Aplin, Alberto Gambaruto   +2 more
wiley   +1 more source

Exoplanet imaging data challenge: benchmarking the various image processing methods for exoplanet detection [PDF]

, 2020
The Exoplanet Imaging Data Challenge is a community-wide effort meant to offer a platform for a fair and common comparison of image processing methods designed for exoplanet direct detection. For this purpose, it gathers on a dedicated repository (Zenodo)
Desgrange, Célia, Schreiber, Laura, Bonse, M. J., Bonse, Markus Johannes, Fuhrmann, T., Cantalloube, Faustine, Dino Mesa, Kenworthy, M., Samland, Matthias, Nasedkin, E., Ruffio, J.-B., Henning, Th., Tiffany Meshkat, Bonse, Markus, Jensen-Clem, R., André Müller, Bonse, J. M., Sébastien Piérard, Schmidt, Dirk, Absil, O., Marc Van Droogenbroeck, Michael Bottom, Regis Bacher, Henning, Thomas H., Flasseur, O., Adaptive Optics Systems VII, Kenworthy, Matthew, Jean-Baptiste Ruffio, Bottom, Michael, Desgrange, C., Célia Desgrange, Mawet, D., Absil, Olivier, Pairet, Benoit, Müller, Andreas, Cantero Mitjans, Carles, Markus Bonse, Benoit Pairet, Bottom, M., Müller, A., Bacher, Raphael, Van Droogenbroeck, Marc, Stone, Jordan, Stone, J., Van Droogenbroeck, M., Fuhrmann, Thomas, Mouillet, David, Samland, M., Flasseur, Olivier, Piérard, S., Cantero, Carles, Henning, Thomas, Jensen-Clem, Rebecca, Ruffio, Jean-Baptiste, Piérard, Sébastien, Müller, André, Mouillet, D., Meshkat, T., Mesa, Dino, Vernet, Elise, Gomez Gonzalez, Carlos, Olivier Absil, Carles Cantero, Meshkat, Tiffany, Pairet, B., Cantalloube, F., Mesa, D., Bacher, Regis, Carl-Henrik Dahlqvist, Matthias Samland, Dahlqvist, C.-H., Thomas H. Henning, Gomez-Gonzalez, Carlos, Dahlqvist, Carl-Henrik, Faustine Cantalloube, Matthew Kenworthy, Bacher, R., Cantero, C., Nasedkin, Evert, Carlos Gomez-Gonzalez, Gomez-Gonzalez, C., Olivier Flasseur, Thomas Fuhrmann, Rebecca Jensen-Clem, Evert Nasedkin, Dimitri Mawet, Mawet, Dimitri, Jordan Stone, David Mouillet   +88 more
core   +1 more source

Exoplanet Occurrence Rate with Age for FGK Stars in Kepler

The Astronomical Journal
We measure the exoplanet occurrence rate as a function of isochrone and gyrochronology ages using confirmed and candidate planets identified in Q1–17 DR25 Kepler data. We employ Kepler's pipeline detection efficiency to correct for the expected number of
Maryum Sayeed, Ruth Angus, Travis A. Berger, Yuxi(Lucy) Lu, Jessie L. Christiansen, Daniel Foreman-Mackey, Melissa K. Ness   +6 more
doaj   +1 more source

Stars over St Andrews : 75 years of observational astronomy at the University Observatory, St Andrews, Scotland

, 2016
This document (© Ron Hilditch, University Observatory, St Andrews, Scotland) gives an account of the observational astronomy conducted at the University Observatory, St Andrews, from its inauguration in 1940 through to the present day, some 75 years ...
Hilditch, R. W.
core  

Impact of Climate States and Seasons on Future Exo-Earth Observations

The Astrophysical Journal
Many planetary parameters impact the climate state of Earth-like exoplanets and could vary significantly from those on Earth. However, some of these parameters may be impossible to observe, causing ambiguity in determining exoplanet climate and ...
Kyle Batra, Stephanie Olson, Vincent Kofman   +2 more
doaj   +1 more source