Results 1 to 10 of about 4,693,249 (249)

Exoplanet Volatile Carbon Content as a Natural Pathway for Haze Formation [PDF]

The Astrophysical Journal Letters, 2023
We explore terrestrial planet formation with a focus on the supply of solid-state organics as the main source of volatile carbon. For the water-poor Earth, the water ice line, or ice sublimation front, within the planet-forming disk has long been a key ...
Edwin A. Bergin, Eliza M.-R. Kempton, Marc Hirschmann, Sandra T. Bastelberger, D. J. Teal, Geoffrey A. Blake, Fred J. Ciesla, Jie Li   +7 more
doaj   +4 more sources

Haze Formation in Warm H₂-rich Exoplanet Atmospheres [PDF]

The Planetary Science Journal, 2020
New observing capabilities coming online over the next few years will provide opportunities for characterization of exoplanet atmospheres. However, clouds/hazes could be present in the atmospheres of many exoplanets, muting the amplitude of spectral ...
Chao He, Sarah M. Hörst, Nikole K. Lewis, Xinting Yu, Julianne I. Moses, Patricia McGuiggan, Mark S. Marley, Eliza M.-R. Kempton, Caroline Morley, Jeff A. Valenti, V. Vuitton   +10 more
semanticscholar   +7 more sources

Dusty Belts Provide Clearer Insights into Exoplanet Formation

Eos
Millimeter-wavelength observations of dust and pebbles in 74 star systems hint that planetary migrations might be more common than we realized.
Damond Benningfield
semanticscholar   +3 more sources

Clear and Cloudy Exoplanet Forecasts for JWST: Maps, Retrieved Composition, and Constraints on Formation with MIRI and NIRCam [PDF]

Astronomical Journal, 2018
The James Webb Space Telescope (JWST) will measure exoplanet transmission and eclipse spectroscopy at unprecedented precisions to better understand planet structure, dynamics, chemistry, and formation.
Everett Schlawin, Thomas P. Greene, Michael Line, Jonathan J. Fortney, Marcia Rieke   +4 more
semanticscholar   +4 more sources

A Neptune-mass exoplanet in close orbit around a very low-mass star challenges formation models

Science, 2023
Theories of planet formation predict that low-mass stars should rarely host exoplanets with masses exceeding that of Neptune. We used radial velocity observations to detect a Neptune-mass exoplanet orbiting LHS 3154, a star that is nine times less ...
Guđmundur Stefánsson, Suvrath Mahadevan, Yamila Miguel, Paul Robertson, Megan Delamer, Shubham Kanodia, Caleb I. Cañas, Joshua N. Winn, Joe P. Ninan, Ryan C. Terrien, Rae Holcomb, Eric B. Ford, Brianna Zawadzki, Brendan P. Bowler, Chad F. Bender, William D. Cochran, Scott A. Diddams, Michael Endl, Connor Fredrick, Samuel Halverson, Fred Hearty, Gary J. Hill, Andrea S. J. Lin, Andrew J. Metcalf, Andrew Monson, Lawrence W. Ramsey, Arpita Roy, Christian Schwab, Jason T. Wright, Gregory R. Zeimann   +29 more
openalex   +3 more sources

Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems [PDF]

The Astronomical Journal, 2023
The geometries of near-resonant planetary systems offer a relatively pristine window into the initial conditions of exoplanet systems. Given that near-resonant systems have likely experienced minimal dynamical disruptions, the spin–orbit orientations of ...
Malena Rice, Xian-Yu Wang, Songhu Wang, Avi Shporer, Khalid Barkaoui, Rafael Brahm, Karen A. Collins, Andrés Jordán, Nataliea Lowson, R. Paul Butler, Jeffrey D. Crane, Stephen Shectman, Johanna K. Teske, David Osip, Kevin I. Collins, Felipe Murgas, Gavin Boyle, Francisco J. Pozuelos, Mathilde Timmermans, Emmanuel Jehin, Michaël Gillon   +20 more
doaj   +2 more sources

A giant exoplanet orbiting a very-low-mass star challenges planet formation models [PDF]

Science, 2019
A small star hosts a big planet M dwarfs, the most common type of star, are low-mass objects that emit most of their faint light in the near-infrared, making it difficult to detect any orbiting exoplanets. Morales et al.
Morales, J. C., Mustill, A. J., Ribas, I., Davies, M. B., Reiners, A., Bauer, F. F., Kossakowski, D., Herrero, E., Rodriguez E, López-González, M. J., Rodríguez-López, C., Béjar, V. J. S., Gonzalez-Cuesta, L., Luque, R., Palle, E., Perger, M., Baroch, D., Johansen, A., Klahr, H., Mordasini, C., Anglada-Escudé, G., Caballero, J. A., Cortés-Contreras, M., Dreizler, S., Lafarga, M., Nagel, E., Passegger, V. M., Reffert, S., Rosich, A., Schweitzer, A, Tal-Or, L., Trifonov, T., Zechmeister, M., Quirrenbach, A., Amado, P. J., Guenther, E. W., Hagen, H. -J., Henning, T., Jeffers, S. V., Kaminski, A., Kurster, M., Montes, D., Seifert, W., Abellán, F. J., Abril, M., Aceituno, J., Aceituno, F. J., Alonso-Floriano, F. J., Ammler-Von Eiff, M., Antona, R., Arroyo-Torres, B., Azzaro, M., Barrado, D., Becerril-Jarque, S., Benitez, D., Berdiñas, Z.M., Bergond, G., Brinkmöller, M., Del Burgo C, Burn, R., Calvo-Ortega, R., Cano, J., Cárdenas, M. C., Cardona Guillén, C., Carro, J., Casal, E., Casanova, V., Casasayas-Barris, N., Chaturvedi, P., Cifuentes, C., Claret, A., Colomé, J., Czesla, S., Díez-Alonso, E., Dorda, R., Emsenhuber, A., Fernandez, M., Fernández-Martín, A., Ferro, I. M., Fuhrmeister, B., Galadí-Enríquez, D., Gallardo Cava, I., García-Vargas, M. L., Garcia-Piquer, A., Gesa, L., González-Álvarez, E., González Hernández J. I., González-Peinado, R., Guàrdia, J., Guijarro, A., de Guindos, E., Hatzes, A. P., Hauschildt, P. H., Hedrosa, R. P., Hermelo, I., Hernández Arabi, R., Hernández Otero, F., Hintz, D., Holgado, G., Huber, A.   +99 more
openalex   +3 more sources

THE IMPRINT OF EXOPLANET FORMATION HISTORY ON OBSERVABLE PRESENT-DAY SPECTRA OF HOT JUPITERS [PDF]

, 2016
The composition of a planet’s atmosphere is determined by its formation, evolution, and present-day insolation. A planet’s spectrum therefore may hold clues on its origins.
C. Mordasini, R. van Boekel, P. Mollière, Th. Henning, Björn Benneke   +4 more
openalex   +3 more sources

PLANETARY POPULATIONS IN THE MASS-PERIOD DIAGRAM: A STATISTICAL TREATMENT OF EXOPLANET FORMATION AND THE ROLE OF PLANET TRAPS [PDF]

, 2013
The rapid growth of observed exoplanets has revealed the existence of several distinct planetary populations in the mass–period diagram. Two of the most surprising are (1) the concentration of gas giants around 1 AU and (2) the accumulation of a large ...
Yasuhiro Hasegawa, Ralph E. Pudritz
openalex   +3 more sources

Methane throughout the atmosphere of the warm exoplanet WASP-80b [PDF]

Nature, 2023
Transmission and emission spectra of the 825 K warm Jupiter WASP-80b taken with the NIRCam instrument of the JWST show strong evidence of CH_4 at greater than 6σ significance The abundances of main carbon- and oxygen-bearing gases in the atmospheres of ...
T. Bell, L. Welbanks, E. Schlawin, M. Line, J. Fortney, Thomas P. Greene, K. Ohno, V. Parmentier, E. Rauscher, T. Beatty, S. Mukherjee, Lindsey S. Wiser, Martha L. Boyer, M. Rieke, J. Stansberry   +14 more
semanticscholar   +1 more source