Results 71 to 80 of about 389 (169)

Unraveling the Mystery of the Peculiar and Young Hot Jupiter CoRoT-2b. I. H2O and CO Detection from Dayside Observations with Gemini-S/IGRINS

The Astronomical Journal
We present ground-based high-resolution spectroscopic pre-eclipse observations of the hot Jupiter CoRoT-2b obtained with the IGRINS spectrograph on Gemini South.
Ying Shu, Lisa Dang, Antoine Darveau-Bernier, Aurora Kesseli, Luc Bazinet, Justin Lipper, Stefan Pelletier, Romain Allart, Nicolas B. Cowan, David Lafreniére, Emily Rauscher, Alejandro Sánchez-López, Björn Benneke, Anne Boucher, René Doyon   +14 more
doaj   +1 more source

Probing the atmospheric dynamics, clouds and chemistry of brown dwarfs and young giant exoplanets

Brown dwarfs and young giant exoplanet are subject to variability and colour changes as the L/T transition. Clouds are expected to be the main driver of the L/T. Using a three-dimensional Global Climate Model, we show that clouds play a major role in shaping the atmospheric properties of brown dwarfs, in agreement with the observed variability and L/T ...
Maio, Francesco, Bonnefoy, M., Chauvin, G., Lacour, S., Nowak, M., Charnay, B., Tremblin, P., Homeier, D., Morley, C., Fortney, J., Denis, A., Petrus, S., Palma-Bifani, P.   +12 more
openaire   +2 more sources

Reinterpreting the JWST Observations of 55 Cancri e with a Nongray General Circulation Model

The Astrophysical Journal
Recent observations of 55 Cancri e suggest an atmosphere rich in CO or CO _2 ; other observations indicate the planet’s eclipse depth is highly variable.
Ruizhi Zhan, Daniel D.B. Koll
doaj   +1 more source

The EBLM project – XIII. The absolute dynamical masses of the circumbinary planet host TOI-1338/BEBOP-1, and applications to the study of exoplanet atmospheres

Monthly Notices of the Royal Astronomical Society
ABSTRACT High-contrast eclipsing binaries with low mass M-dwarf secondaries are precise benchmark stars to build empirical mass–radius relationships for fully convective low-mass ($\rm M_{\star } \lt 0.35\, M_{\odot }$) dwarf stars. The contributed light of the M-dwarf in such binaries is usually much less than one per cent at optical ...
D Sebastian, A H M J Triaud, M Brogi, Thomas A Baycroft, Matthew R Standing, Pierre F L Maxted, David V Martin, Lalitha Sairam, Martin B Nielsen   +8 more
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Coupling the Secular Dynamical and Atmospheric Evolution of Close-in Exoplanets

This thesis plunges into the enigmatic formation of the hot Neptune desert, a sparsely populated region of exoplanetary demographics, by exploring the processes that shape close-in exoplanets. Central to this inquiry is the interplay between atmospheric evaporation and orbital migration, two pivotal mechanisms governing the evolution of planetary ...
openaire   +2 more sources

The Metallicity and Carbon-to-oxygen Ratio of the Ultrahot Jupiter WASP-76b from Gemini-S/IGRINS

The Astronomical Journal
Measurements of the carbon-to-oxygen (C/O) ratios of exoplanet atmospheres can reveal details about their formation and evolution. Recently, high-resolution cross-correlation analysis has emerged as a method of precisely constraining the C/O ratios of ...
Megan Weiner Mansfield, Michael R. Line, Joost P. Wardenier, Matteo Brogi, Jacob L. Bean, Hayley Beltz, Peter Smith, Joseph A. Zalesky, Natasha Batalha, Eliza M.-R. Kempton, Benjamin T. Montet, James E. Owen, Peter Plavchan, Emily Rauscher   +13 more
doaj   +1 more source

Global Chemical Transport on Hot Jupiters: Insights from the 2D VULCAN Photochemical Model

The Astrophysical Journal
The atmospheric dynamics of tidally locked hot Jupiters is characterized by strong equatorial winds. Understanding the interaction between global circulation and chemistry is crucial in atmospheric studies and interpreting observations.
Shang-Min Tsai, Vivien Parmentier, João M. Mendonça, Xianyu Tan, Russell Deitrick, Mark Hammond, Arjun B. Savel, Xi Zhang, Raymond T. Pierrehumbert, Edward W. Schwieterman   +9 more
doaj   +1 more source

Atmospheric Circulation of High-obliquity Mini-Neptunes

The Astrophysical Journal
With the operation of JWST, atmospheric characterization has now extended to low-mass exoplanets. In compact multiplanetary systems, secular spin-orbital resonance may preserve high obliquities and asynchronous rotation even for tidally despinning, low ...
Yanhong Lai, Xianyu Tan, Yubo Su
doaj   +1 more source

The composition and dynamics of exoplanet atmospheres. [PDF]

The study of exoplanets has rapidly developed in the last twenty years, and the detailed characterization of planetary atmospheres has become a key area of research.\ud \ud For transiting planets around bright stars, atmospheric features can be detected with transmission spectroscopy.
openaire  

Precise Constraints on the Energy Budget of WASP-121 b from Its JWST NIRISS/SOSS Phase Curve

The Astronomical Journal
Ultra-hot Jupiters exhibit day-to-night temperature contrasts upwards of 1000 K due to competing effects of strong winds, short radiative timescales, magnetic drag, and H _2 dissociation/recombination. Spectroscopic phase curves provide critical insights
Jared Splinter, Louis-Philippe Coulombe, Robert C. Frazier, Nicolas B. Cowan, Emily Rauscher, Lisa Dang, Michael Radica, Sean Collins, Stefan Pelletier, Romain Allart, Ryan J. MacDonald, David Lafrenière, Loïc Albert, Björn Benneke, René Doyon, Ray Jayawardhana, Doug Johnstone, Vigneshwaran Krishnamurthy, Caroline Piaulet-Ghorayeb, Lisa Kaltenegger, Michael R. Meyer, Jake Taylor, Jake D. Turner   +22 more
doaj   +1 more source