Results 21 to 30 of about 3,834 (215)

Helium in the eroding atmosphere of an exoplanet [PDF]

Nature, 2018
Helium is the second-most abundant element in the Universe after hydrogen and is one of the main constituents of gas-giant planets in our Solar System. Early theoretical models predicted helium to be among the most readily detectable species in the atmospheres of exoplanets, especially in extended and escaping atmospheres 1 .
Spake, JJ, Sing, DK, Evans, TM, Oklopčić, A, Bourrier, V, Kreidberg, L, Rackham, BV, Irwin, J, Ehrenreich, D, Wyttenbach, A, Wakeford, HR, Zhou, Y, Chubb, KL, Nikolov, N, Goyal, JM, Henry, GW, Williamson, MH, Blumenthal, S, Anderson, DR, Hellier, C, Charbonneau, D, Udry, S, Madhusudhan, N   +22 more
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Atmospheres of Rocky Exoplanets

Annual Review of Astronomy and Astrophysics, 2022
Rocky planets are common around other stars, but their atmospheric properties remain largely unconstrained. Thanks to a wealth of recent planet discoveries and upcoming advances in observing capability, we are poised to characterize the atmospheres of dozens of rocky exoplanets in this decade.
Wordsworth, R., Kreidberg, L.
openaire   +5 more sources

A JWST NIRSpec Phase Curve for WASP-121b: Dayside Emission Strongest Eastward of the Substellar Point and Nightside Conditions Conducive to Cloud Formation

The Astrophysical Journal Letters, 2023
We present the first exoplanet phase-curve measurement made with the JWST NIRSpec instrument, highlighting the exceptional stability of this newly commissioned observatory for exoplanet climate studies.
Thomas Mikal-Evans, David K. Sing, Jiayin Dong, Daniel Foreman-Mackey, Tiffany Kataria, Joanna K. Barstow, Jayesh M. Goyal, Nikole K. Lewis, Joshua D. Lothringer, Nathan J. Mayne, Hannah R. Wakeford, Duncan A. Christie, Zafar Rustamkulov   +12 more
doaj   +1 more source

ExTrA: Exoplanets in transit and their atmospheres [PDF]

SPIE Proceedings, 2015
15 pages, 11 figures, SPIE ...
X. Bonfils, J. M. Almenara, L. Jocou, A. Wunsche, P. Kern, A. Delboulbé, X. Delfosse, P. Feautrier, T. Forveille, L. Gluck, S. Lafrasse, Y. Magnard, D. Maurel, T. Moulin, F. Murgas, P. Rabou, S. Rochat, A. Roux, E. Stadler   +18 more
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Illusion and reality in the atmospheres of exoplanets [PDF]

Journal of Geophysical Research: Planets, 2017
AbstractThe atmospheres of exoplanets reveal all their properties beyond mass, radius, and orbit. Based on bulk densities, we know that exoplanets larger than 1.5 Earth radii must have gaseous envelopes and, hence, atmospheres. We discuss contemporary techniques for characterization of exoplanetary atmospheres.
L. Drake Deming, Sara Seager
openaire   +4 more sources

Coexistence of CH4, CO2 and H2O in exoplanet atmospheres [PDF]

, 2020
P.W. and Ch.H. acknowledge funding from the European Union H2020-MSCA-ITN-2019 under Grant Agreement no. 860470 (CHAMELEON). O.H. acknowledges the PhD stipend form the University of St Andrews’ Centre for Exoplanet Science. P.B. acknowledges support from
M. Dominik, P. Barth, Barth, P., Woitke, P., O. Herbort, Ch. Helling, E. Stüeken, Samra, D., D. Samra, Helling, Ch, Dominik, M., Herbort, O., P. Woitke, Stüeken, E.   +13 more
core   +1 more source

The Hazy and Metal-rich Atmosphere of GJ 1214 b Constrained by Near- and Mid-infrared Transmission Spectroscopy

The Astrophysical Journal, 2023
The near-infrared transmission spectrum of the warm sub-Neptune exoplanet GJ 1214 b has been observed to be flat and featureless, implying a high metallicity atmosphere with abundant aerosols.
Peter Gao, Anjali A. A. Piette, Maria E. Steinrueck, Matthew C. Nixon, Michael Zhang, Eliza M.-R. Kempton, Jacob L. Bean, Emily Rauscher, Vivien Parmentier, Natasha E. Batalha, Arjun B. Savel, Anastasia Triantafillides, Michael T. Roman, Isaac Malsky, Jake Taylor   +14 more
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Exoplanet Atmospheres and Photochemistry [PDF]

Proceedings of the International Astronomical Union, 2005
Over 150 extrasolar planets are known to orbit sun-like stars. A growing number of them (9 to date) are transiting “hot Jupiters” whose physical characteristics can be measured. Atmospheres of two of these planets have already been detected. We summarize the atmosphere detections and useful upper limits, focusing on the MOST albedo upper limit and II ...
Seager, S., Liang, M.-C., Parkinson, C. D., Yung, Y. L.   +3 more
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Identification of carbon dioxide in an exoplanet atmosphere [PDF]

Nature, 2022
AbstractCarbon dioxide (CO2) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO2is an indicator of the metal enrichment (that is, elements heavier than helium, also called ‘metallicity’)1–3, and thus the formation processes of the primary atmospheres of hot gas giants4–6. It is also one of
The JWST Transiting Exoplanet Community Early Release Science Team, Ahrer, Eva-Maria, Alderson, Lili, Batalha, Natalie M., Batalha, Natasha E., Bean, Jacob L., Beatty, Thomas G., Bell, Taylor J., Benneke, Björn, Berta-Thompson, Zachory K., Carter, Aarynn L., Crossfield, Ian J. M., Espinoza, Néstor, Feinstein, Adina D., Fortney, Jonathan J., Gibson, Neale P., Goyal, Jayesh M., Kempton, Eliza M. -R., Kirk, James, Kreidberg, Laura, López-Morales, Mercedes, Line, Michael R., Lothringer, Joshua D., Moran, Sarah E., Mukherjee, Sagnick, Ohno, Kazumasa, Parmentier, Vivien, Piaulet, Caroline, Rustamkulov, Zafar, Schlawin, Everett, Sing, David K., Stevenson, Kevin B., Wakeford, Hannah R., Allen, Natalie H., Birkmann, Stephan M., Brande, Jonathan, Crouzet, Nicolas, Cubillos, Patricio E., Damiano, Mario, Désert, Jean-Michel, Gao, Peter, Harrington, Joseph, Hu, Renyu, Kendrew, Sarah, Knutson, Heather A., Lagage, Pierre-Olivier, Leconte, Jérémy, Lendl, Monika, MacDonald, Ryan J., May, E. M., Miguel, Yamila, Molaverdikhani, Karan, Moses, Julianne I., Murray, Catriona Anne, Nehring, Molly, Nikolov, Nikolay K., de la Roche, D. J. M. Petit dit, Radica, Michael, Roy, Pierre-Alexis, Stassun, Keivan G., Taylor, Jake, Waalkes, William C., Wachiraphan, Patcharapol, Welbanks, Luis, Wheatley, Peter J., Aggarwal, Keshav, Alam, Munazza K., Banerjee, Agnibha, Barstow, Joanna K., Blecic, Jasmina, Casewell, S. L., Changeat, Quentin, Chubb, K. L., Colón, Knicole D., Coulombe, Louis-Philippe, Daylan, Tansu, de Val-Borro, Miguel, Decin, Leen, Santos, Leonardo A. Dos, Flagg, Laura, France, Kevin, Fu, Guangwei, Muñoz, A. García, Gizis, John E., Glidden, Ana, Grant, David, Heng, Kevin, Henning, Thomas, Hong, Yu-Cian, Inglis, Julie, Iro, Nicolas, Kataria, Tiffany, Komacek, Thaddeus D., Krick, Jessica E., Lee, Elspeth K. H., Lewis, Nikole K., Lillo-Box, Jorge, Lustig-Yaeger, Jacob, Mancini, Luigi, Mandell, Avi M., Mansfield, Megan, Marley, Mark S., Mikal-Evans, Thomas, Morello, Giuseppe, Nixon, Matthew C., Ceballos, Kevin Ortiz, Piette, Anjali A. A., Powell, Diana, Rackham, Benjamin V., Ramos-Rosado, Lakeisha, Rauscher, Emily, Redfield, Seth, Rogers, Laura K., Roman, Michael T., Roudier, Gael M., Scarsdale, Nicholas, Shkolnik, Evgenya L., Southworth, John, Spake, Jessica J., Steinrueck, Maria E, Tan, Xianyu, Teske, Johanna K., Tremblin, Pascal, Tsai, Shang-Min, Tucker, Gregory S., Turner, Jake D., Valenti, Jeff A., Venot, Olivia, Waldmann, Ingo P., Wallack, Nicole L., Zhang, Xi, Zieba, Sebastian   +131 more
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Retrieving C and O Abundance of HR 8799 c by Combining High- and Low-resolution Data

The Astronomical Journal, 2022
The formation and evolution pathway for the directly imaged multiplanetary system HR 8799 remains mysterious. Accurate constraints on the chemical composition of the planetary atmosphere(s) are key to solving the mystery.
Ji Wang, Jason J. Wang, Jean-Baptiste Ruffio, Geoffrey A. Blake, Dimitri Mawet, Ashley Baker, Randall Bartos, Charlotte Z. Bond, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Daniel Echeverri, Luke Finnerty, Michael P. Fitzgerald, Nemanja Jovanovic, Ronald Lopez, Emily C. Martin, Evan Morris, Jacklyn Pezzato, Sam Ragland, Garreth Ruane, Ben Sappey, Tobias Schofield, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Peter Wizinowich, Jerry W. Xuan, Marta L. Bryan, Arpita Roy, Nicole L. Wallack   +31 more
doaj   +1 more source