Results 81 to 90 of about 464 (180)

The Persistent Thermal Anomalies in Rocky Worlds

The Astrophysical Journal
Observing the dayside thermal emissions of rocky exoplanets provides essential insights into their compositions and the presence of atmospheres. Even though no conclusive evidence has been found for atmospheres on small rocky exoplanets orbiting M dwarfs,
Zifan Lin, Tansu Daylan
doaj   +1 more source

JWST TRAPPIST-1 e/b Program: Motivation and First Observations

The Astronomical Journal
One of the forefront goals in the field of exoplanets is the detection of an atmosphere on a temperate terrestrial exoplanet, and among the best suited systems to do so is TRAPPIST-1.
Natalie H. Allen, Néstor Espinoza, V. A. Boehm, Caleb I. Cañas, Kevin B. Stevenson, Nikole K. Lewis, Ryan J. MacDonald, Brett M. Morris, Eric Agol, Knicole Colón, Hannah Diamond-Lowe, Ana Glidden, Amélie Gressier, Jingcheng Huang, Zifan Lin, Douglas Long, Dana R. Louie, Meredith A. MacGregor, Laurent Pueyo, Benjamin V. Rackham, Sukrit Ranjan, Sara Seager, Guadalupe Tovar Mendoza, Jeff A. Valenti, Daniel Valentine, Roeland P. van der Marel, Hannah R. Wakeford   +26 more
doaj   +1 more source

No Thick Atmosphere on the Terrestrial Exoplanet Gl 486b

The Astrophysical Journal Letters
A primary science goal for JWST is to detect and characterize the atmospheres of terrestrial planets orbiting M dwarfs (M-Earths). The existence of atmospheres on M-Earths is highly uncertain because their host stars’ extended history of high X-ray and ...
Megan Weiner Mansfield, Qiao Xue, Michael Zhang, Alexandra S. Mahajan, Jegug Ih, Daniel Koll, Jacob L. Bean, Brandon Park Coy, Jason D. Eastman, Eliza M.-R. Kempton, Edwin S. Kite   +10 more
doaj   +1 more source

Validation of a Third Earth-sized Planet in the TOI-2267 Binary System

The Astronomical Journal
We report the validation of a third terrestrial exoplanet in the nearby (22 pc) TOI-2267 system. TOI-2267 is a binary system with stellar components TOI-2267A (M5, 3030 K) and TOI-2267B (M6, 2930 K), with an on-sky separation of 0 $\mathop{.}\limits ...
Michael Greklek-McKeon, Jonathan Gomez Barrientos, Heather A. Knutson, Sebastián Zúñiga-Fernández, Francisco J. Pozuelos, Morgan Saidel, W. Garrett Levine, Renyu Hu, Fei Dai, Tansu Daylan, John P. Doty, David R. Rodriguez, Joseph D. Twicken, David W. Latham, Jon M. Jenkins, Richard P. Schwarz   +15 more
doaj   +1 more source

Exocometary Science [PDF]

, 2019
This paper describes recent advances that led to the emergence of Exocometary Science, with an outlook and recommendations for the field to prospect in future decades.
Brandeker, A., Kennedy, G., Wyatt, M., Dent, W., Hughes, M., Marino, S., Matthews, B., Cataldi, G., Gaspar, A., Kral, Q., Matra, L., Oberg, K., Zuckerman, B., Kiefer, F., Wilson, P., Moor, A., Higuchi, A., Welsh, B., Wilner, D., Lyra, W., Su, K., Roberge, A., Lecavelier des Etangs, A.   +22 more
core   +1 more source

JWST COMPASS: A NIRSpec G395H Transmission Spectrum of the Super-Earth GJ 357 b

The Astronomical Journal
We present JWST NIRSpec/G395H transmission spectroscopy observations of GJ 357 b, a warm ( T _eq  ≈ 525 K) super-Earth (1.2 R _⊕ , 1.84 M _⊕ ) orbiting a nearby M3-type star, with a median precision of 18 ppm and 27 ppm in NRS1 and NRS2, respectively ...
Jea Adams Redai, Nicholas Wogan, Nicole L. Wallack, Munazza K. Alam, Artyom Aguichine, Angie Wolfgang, Hannah R. Wakeford, Johanna Teske, Nicholas Scarsdale, Sarah E. Moran, Mercedes López-Morales, Annabella Meech, Peter Gao, Anna Gagnebin, Natasha E. Batalha, Natalie M. Batalha, Lili Alderson   +16 more
doaj   +1 more source

Unraveling the complex inventory of biorelevant organics in the plumes of icy moons. [PDF]

Proc Natl Acad Sci U S A, 2023
Kaiser RI.
europepmc   +1 more source

Effects of dynamical evolution of giant planets on the delivery of atmophile elements during terrestrial planet formation

, 2016
Recent observations started revealing the compositions of protostellar disks and planets beyond the solar system. In this paper, we explore how the compositions of terrestrial planets are affected by the dynamical evolution of giant planets.
Ida, Shigeru, Matsumura, Soko; id_orcid, Brasser, Ramon   +2 more
core   +1 more source

Hot Rocks Survey. V. Secondary Eclipse Photometry of GJ 3473 b with JWST/MIRI

The Astronomical Journal
JWST is transforming our ability to characterize small exoplanets, from sub-Neptunes to rocky worlds. A key open question is whether highly irradiated rocky planets can retain atmospheres or are stripped bare by stellar irradiation—a boundary that ...
Måns Holmberg, Hannah Diamond-Lowe, João M. Mendonça, Daniel Kitzmann, Néstor Espinoza, Natalie H. Allen, Prune C. August, Mark Fortune, Amélie Gressier, Jegug Ih, Erik Meier Valdés, Merlin Zgraggen, Lars A. Buchhave, Brice-Olivier Demory, Chloe Fisher, Neale P. Gibson, Kevin Heng, Bibiana Prinoth, Adam J. Burgasser   +18 more
doaj   +1 more source

Can there be additional rocky planets in the Habitable Zone of tight binary stars with a known gas giant?

, 2015
International audienceLocating planets in Habitable Zones (HZs) around other stars is a growing field in contemporary astronomy. Since a large percentage of all G-M stars in the solar neighbourhood are expected to be part of binary or multiple stellar ...
Pilat-Lohinger, Elke, Funk, B., Eggl, Siegfried   +2 more
core   +1 more source