Results 61 to 70 of about 9,607 (187)

Imaging Cool Giant Planets in Reflected Light: Science Investigations and Synergy with Habitable Planets [PDF]

, 2019
Planned astronomical observatories of the 2020s will be capable of obtaining reflected light photometry and spectroscopy of cool extrasolar giant planets.
Arney, Giada, Bailey, Vanessa, Batalha, Natasha, Beichman, Charles, Benneke, Björn, Blecic, Jasmina, Cahoy, Kerri, Chilcote, Jeffrey, Domagal-Goldman, Shawn, Dressing, Courtney, Fitzgerald, Michael, Fortney, Jonathan, Freedman, Richard, Gelino, Dawn, Gizis, John, Greene, Thomas, Guyon, Olivier, Hammel, Heidi, Hasegawa, Yasuhiro, Jovanovic, Nemanja, Konopacky, Quinn, Kopparapu, Ravi, Lewis, Nikole, Liu, Michael, Lopez, Eric, Lunine, Jonathan, Lupu, Roxana, Macintosh, Bruce, Mandt, Kathleen, Marley, Mark, Marois, Christian, Mawet, Dimitri, Mayorga, Laura, Morley, Caroline, Nielsen, Eric, Roberge, Aki, Serabyn, Eugene, Skemer, Andrew, Stapelfeldt, Karl, Visscher, Channon, Wang, Jason   +40 more
core   +1 more source

petitRADTRANS: a Python radiative transfer package for exoplanet characterization and retrieval

, 2019
We present the easy-to-use, publicly available, Python package petitRADTRANS, built for the spectral characterization of exoplanet atmospheres. The code is fast, accurate, and versatile; it can calculate both transmission and emission spectra within a ...
Henning, Th., Molaverdikhani, K., Mollière, P., Snellen, I. A. G., van Boekel, R., Wardenier, J. P.   +5 more
core   +1 more source

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

Up, Up, and Away: Winds and Dynamical Structure as a Function of Altitude in the Ultrahot Jupiter WASP-76b

The Astrophysical Journal
Due to the unprecedented signal strengths offered by the newest high-resolution spectrographs on 10 m class telescopes, exploring the 3D nature of exoplanets is possible with an unprecedented level of precision.
Aurora Y. Kesseli, Hayley Beltz, Emily Rauscher, I. A. G. Snellen   +3 more
doaj   +1 more source

The Roasting Marshmallows Program with IGRINS on Gemini South I: Composition and Climate of the Ultrahot Jupiter WASP-18 b

The Astronomical Journal, 2023
We present high-resolution dayside thermal emission observations of the exoplanet WASP-18 b using IGRINS on Gemini South. We remove stellar and telluric signatures using standard algorithms, and we extract the planet signal via cross-correlation with ...
Matteo Brogi, Vanessa Emeka-Okafor, Michael R. Line, Siddharth Gandhi, Lorenzo Pino, Eliza M.-R. Kempton, Emily Rauscher, Vivien Parmentier, Jacob L. Bean, Gregory N. Mace, Nicolas B. Cowan, Evgenya Shkolnik, Joost P. Wardenier, Megan Mansfield, Luis Welbanks, Peter Smith, Jonathan J. Fortney, Jayne L. Birkby, Joseph A. Zalesky, Lisa Dang, Jennifer Patience, Jean-Michel Désert   +21 more
doaj   +1 more source

Astro2020 Science White Paper: Toward Finding Earth 2.0: Masses and Orbits of Small Planets with Extreme Radial Velocity Precision [PDF]

, 2019
Having discovered that Earth-sized planets are common, we are now embarking on a journey to determine if Earth-like planets are also common. Finding Earth-like planets is one of the most compelling endeavors of the 21st century - leading us toward ...
Bean, Jacob, Burt, Jennifer, Ciardi, David R., Dragomir, Diana, Gaidos, Eric, Johnson, Marshall C., Kempton, Eliza, Konopacky, Quinn, Meyer, Michael, Teske, Johanna, Weiss, Lauren, Zhou, George   +11 more
core   +1 more source

Exploring atmospheres of hot mini-Neptunes and extrasolar giant planets orbiting different stars with application to HD 97658b, WASP-12b, CoRoT-2b, XO-1b and HD 189733b

, 2013
We calculated an atmospheric grid for hot mini-Neptune and giant exoplanets, that links astrophysical observable parameters- orbital distance and stellar type- with the chemical atmospheric species expected.
Kaltenegger, Lisa, Miguel, Yamila
core   +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

JWST Transmission Spectroscopy of HD 209458b: A Supersolar Metallicity, a Very Low C/O, and No Evidence of CH4, HCN, or C2H2

The Astrophysical Journal Letters
We present the transmission spectrum of the original transiting hot Jupiter HD 209458b from 2.3 to 5.1 μ m as observed with the NIRCam instrument on the James Webb Space Telescope (JWST). Previous studies of HD 209458b’s atmosphere have given conflicting
Qiao Xue, Jacob L. Bean, Michael Zhang, Luis Welbanks, Jonathan Lunine, Prune August   +5 more
doaj   +1 more source

Earth as a Transiting Exoplanet: A Validation of Transmission Spectroscopy and Atmospheric Retrieval Methodologies for Terrestrial Exoplanets

The Planetary Science Journal, 2023
The James Webb Space Telescope (JWST) will enable the search for and characterization of terrestrial exoplanet atmospheres in the habitable zone via transmission spectroscopy.
Jacob Lustig-Yaeger, Victoria S. Meadows, David Crisp, Michael R. Line, Tyler D. Robinson   +4 more
doaj   +1 more source