Results 101 to 110 of about 13,254 (205)

Exoplanet Diversity in the Era of Space-based Direct Imaging Missions

, 2018
This whitepaper discusses the diversity of exoplanets that could be detected by future observations, so that comparative exoplanetology can be performed in the upcoming era of large space-based flagship missions.
Adibekyan, Vardan, Airapetian, Vladimir, Anbar, Ariel, Arney, Giada, Batalha, Natalie M., Beckwith, Steven, Belikov, Rus, Charnay, Benjamin, Curry, Shannon, Danchi, William, Del Genio, Anthony D., Desch, Steve, Domagal-Goldman, Shawn, Dong, Chuanfei, Ford, Eric B., Fortney, Jonathan, France, Kevin, Gelino, Dawn, Guzewich, Scott D., Haqq-Misra, Jacob, Harman, Chester E., Hartnett, Hilairy E., Hasegawa, Yasuhiro, Hebrard, Eric, Henning, Wade, Hicks, Brian, Hinkel, Natalie, Izenberg, Noam, Jensen, Adam, Jontof-Hutter, Daniel, Kane, Stephen R., Kohler, Erika, Kopparapu, Ravi, Lisse, Carey M., Lopez, Eric D., Lyra, Wladimir, Mandell, Avi, Mandt, Kathleen E., Marchis, Franck, Minniti, Dante, Moore, Bill, Mulders, Gijs D., Nixon, Conor, Pierrehumbert, Ray, Rau, Gioia, Renaud, Joe, Rinehart, Stephen, Roberge, Aki, Scharf, Caleb, Schwieterman, Edward W., Shock, Everett, Stark, Chris, Teal, Dillon, Teske, Johanna, Trainer, Melissa, Way, Michael, Wolf, Eric T., Young, Patrick   +57 more
core  

JWST/NIRISS Reveals the Water-rich “Steam World” Atmosphere of GJ 9827 d

The Astrophysical Journal Letters
With sizable volatile envelopes but smaller radii than the solar system ice giants, sub-Neptunes have been revealed as one of the most common types of planet in the galaxy. While the spectroscopic characterization of larger sub-Neptunes (2.5–4 R _⊕ ) has
Caroline Piaulet-Ghorayeb, Björn Benneke, Michael Radica, Eshan Raul, Louis-Philippe Coulombe, Eva-Maria Ahrer, Daria Kubyshkina, Ward S. Howard, Joshua Krissansen-Totton, Ryan J. MacDonald, Pierre-Alexis Roy, Amy Louca, Duncan Christie, Marylou Fournier-Tondreau, Romain Allart, Yamila Miguel, Hilke E. Schlichting, Luis Welbanks, Charles Cadieux, Caroline Dorn, Thomas M. Evans-Soma, Jonathan J. Fortney, Raymond Pierrehumbert, David Lafrenière, Lorena Acuña, Thaddeus Komacek, Hamish Innes, Thomas G. Beatty, Ryan Cloutier, René Doyon, Anna Gagnebin, Cyril Gapp, Heather A. Knutson   +32 more
doaj   +1 more source

Supersolar Metallicity and Tentative Evidence for Photochemistry on WASP-96 b from JWST and Ground-based VLT Transmission Spectroscopy

The Astronomical Journal
With its expanded wavelength coverage and increased precision compared to previous space-based observatories, JWST provides the opportunity to revisit benchmark planets and view them in a new light. Here, we conduct an in-depth study of the atmosphere of
Michael Radica, Jake Taylor, Yoav Rotman, Jasmina Blecic, Luis Welbanks, Eva-Maria Ahrer, Duncan Christie, Louis-Philippe Coulombe, Gillis Lowry, Matthew M. Murphy, Adina D. Feinstein, David Lafrenière, Ryan J. MacDonald, Nathan J. Mayne, Shang-Min Tsai, Maria Zamyatina   +15 more
doaj   +1 more source

A High-resolution Non-detection of Escaping Helium in the Ultrahot Neptune LTT 9779b: Evidence for Weakened Evaporation

The Astrophysical Journal Letters
The recent discovery of “ultrahot” ( P < 1 day) Neptunes has come as a surprise: some of these planets have managed to retain gaseous envelopes despite being close enough to their host stars to trigger strong photoevaporation and/or Roche lobe overflow ...
Shreyas Vissapragada, Patrick McCreery, Leonardo A. Dos Santos, Néstor Espinoza, Andrew McWilliam, Noriyuki Matsunaga, Jéa Adams Redai, Patrick Behr, Kevin France, Satoshi Hamano, Charlie Hull, Yuji Ikeda, Haruki Katoh, Hideyo Kawakita, Mercedes López-Morales, Kevin N. Ortiz Ceballos, Shogo Otsubo, Yuki Sarugaku, Tomomi Takeuchi   +18 more
doaj   +1 more source

A New Approach to Compiling Exoatmospheric Target Lists and Quantifying the Ground-based Resources Needed to Vet Them

The Astronomical Journal
Transiting exoplanet atmospheric characterization is currently in a golden age as dozens of exoplanet atmospheres are being studied by NASA’s Hubble and James Webb Space Telescopes.
Jennifer A. Burt, Robert T. Zellem, David R. Ciardi, Shubham Kanodia, Geoffrey Bryden, Tiffany Kataria, Kyle A. Pearson, Jessie L. Christiansen, Charles Beichman, B. J. Fulton, Mark Swain   +10 more
doaj   +1 more source

Uniform Reanalysis of JWST MIRI 15 μm Exoplanet Eclipse Observations Using Frame-normalized Principal Component Analysis

The Astrophysical Journal Letters
James Webb Space Telescope (JWST) MIRI 15 μ m time-series eclipse photometry presents a powerful way to probe for the presence of atmospheres on low-temperature rocky exoplanets orbiting nearby stars.
Nicholas J. Connors, Christopher Monaghan, Björn Benneke, Lisa Dang   +3 more
doaj   +1 more source

JWST-TST DREAMS: Nonuniform Dayside Emission for WASP-17b from MIRI/LRS

The Astronomical Journal
We present the first spectroscopic characterization of the dayside atmosphere of WASP-17b in the mid-infrared using a single JWST MIRI/LRS eclipse observation.
Daniel Valentine, Hannah R. Wakeford, Ryan C. Challener, Natasha E. Batalha, Nikole K. Lewis, David Grant, Elijah Mullens, Lili Alderson, Jayesh Goyal, Ryan J. MacDonald, Erin M. May, Sara Seager, Kevin B. Stevenson, Jeff A. Valenti, Natalie H. Allen, Néstor Espinoza, Ana Glidden, Amélie Gressier, Jingcheng Huang, Zifan Lin, Douglas Long, Dana R. Louie, Mark Clampin, Marshall Perrin, Roeland P. van der Marel, C. Matt Mountain   +25 more
doaj   +1 more source

HST Transmission Spectra of the Hot Neptune HD 219666 b: Detection of Water and the Challenge of Constraining Both Water and Methane

The Astronomical Journal
Although Neptunian-sized (2–5 R _⊕ ) planets appear to be extremely common in the Galaxy, many mysteries remain about their overall nature. To date, only 11 Neptunian-sized planets have had their atmospheres spectroscopically characterized, and these ...
Matthew M. Murphy, Thomas G. Beatty, Luis Welbanks, Guangwei Fu   +3 more
doaj   +1 more source

Ex(o)plain: Subgroup-Level Analysis of Exoplanet Atmospheric Parameters

IEEE Access
Deep learning has been shown to be a valuable tool in astrophysics. In the field of exoplanetary science, deep learning-based approaches are being used extensively to automate the characterization of exoplanet atmospheres, reducing computational costs ...
Alkis Koudounas, Flavio Giobergia, Elena Baralis   +2 more
doaj   +1 more source

Overcast Mornings and Clear Evenings in Hot Jupiter Exoplanet Atmospheres

The Astrophysical Journal Letters
Aerosols are an old topic in the young field of exoplanet atmospheres. Understanding what they are, how they form, and where they go has long provided a fertile playground for theorists.
Guangwei Fu, Sagnick Mukherjee, Kevin B. Stevenson, David K. Sing, Reza Ashtari, Nathan Mayne, Joshua D. Lothringer, Maria Zamyatina, Stephen P. Schmidt, Carlos Gascón, Natalie H. Allen, Katherine A. Bennett, Mercedes López-Morales   +12 more
doaj   +1 more source