Results 101 to 110 of about 9,564 (167)

PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). I. The Ubiquity of Fe i Emission and Inversions in Ultrahot Jupiter Atmospheres

The Astronomical Journal
We present high-resolution optical emission spectroscopy observations of the ultrahot Jupiters (UHJs) TOI-1431 b and TOI-1518 b using the PEPSI spectrograph on the LBT.
Sydney Petz, Marshall C. Johnson, Anusha Pai Asnodkar, Alison Duck, Ji Wang, Ilya Ilyin, Klaus G. Strassmeier   +6 more
doaj   +1 more source

Coupled Planetary Interior and Tidal Evolution

The Astrophysical Journal
We present a new planetary structure/thermal evolution model, designed for use in problems that couple orbital dynamics with planetary structure. We first benchmark our structural/thermal evolution calculations against the MESA stellar evolution code ...
Tim Hallatt, Sarah Millholland
doaj   +1 more source

Not All Sub-Neptune Exoplanets Have Magma Oceans

The Astrophysical Journal Letters
The evolution and structure of sub-Neptunes may be strongly influenced by interactions between the outer gaseous envelope of the planet and a surface magma ocean.
Bodie Breza, Matthew C. Nixon, Eliza M.-R. Kempton   +2 more
doaj   +1 more source

Puffy Venuses: The Mass–Radius Impact of Carbon-rich Atmospheres on Lava Worlds

The Astrophysical Journal
The recent advancements in exoplanet observations enable the potential detection of exo-Venuses, rocky planets with carbon-rich atmospheres. How extended these atmospheres can be, given high carbon abundances, has not been studied.
Bo Peng, Diana Valencia
doaj   +1 more source

The JWST Rocky Worlds DDT Program Reveals GJ 3929b to Likely Be a Bare Rock

The Astrophysical Journal Letters
We report first results from the JWST Rocky Worlds Director’s Discretionary Time program. Two secondary eclipses of the terrestrial exoplanet GJ 3929b were recently observed using MIRI photometric imaging at 15 μ m.
Qiao Xue, Michael Zhang, Brandon Park Coy, Madison Brady, Xuan Ji, Jacob L. Bean, Michael Radica, Andreas Seifahrt, Julian Stürmer, Rafael Luque, Ritvik Basant, Nina Brown, Tanya Das, David Kasper, Caroline Piaulet-Ghorayeb, Eliza M.-R. Kempton, Edwin Kite   +16 more
doaj   +1 more source

A Disintegrating Rocky World Shrouded in Dust and Gas: Mid-infrared Observations of K2-22 b Using JWST

The Astrophysical Journal Letters
The disintegrating ultrashort period rocky exoplanet K2-22 b periodically emits dusty clouds in a dynamically chaotic process resulting in a variable transit depth from 0% to 1.3%.
Nick Tusay, Jason T. Wright, Thomas G. Beatty, Steve Desch, Knicole Colón, Tushar Mittal, Hugh P. Osborn, Beatriz Campos Estrada, James E. Owen, Jessica Libby-Roberts, Arvind F. Gupta, Brad Foley, Erik Meier Valdés, Daniel J. Stevens, Ashley Herbst   +14 more
doaj   +1 more source

Magma Ocean Interactions Can Explain JWST Observations of the Sub-Neptune TOI-270 d

The Astrophysical Journal
Sub-Neptunes with substantial atmospheres may possess magma oceans in contact with the overlying gas, with chemical interactions between the atmosphere and magma playing an important role in shaping atmospheric composition.
Matthew C. Nixon, R. Sander Somers, Arjun B. Savel, Jegug Ih, Eliza M.-R. Kempton, Edward D. Young, Hilke E. Schlichting, Tim Lichtenberg, Luis Welbanks, William Misener, Anjali A. A. Piette, Nicholas F. Wogan   +11 more
doaj   +1 more source

The Uncertainty in Water Mass Fraction of Wet Planets

The Astrophysical Journal
Planets with masses between Earth and Neptune often have radii that imply the presence of volatiles, suggesting that water may be abundant in their interiors.
Michael Lozovsky
doaj   +1 more source

Assessing Robustness and Bias in 1D Retrievals of 3D Global Circulation Models at High Spectral Resolution: A WASP-76 b Simulation Case Study in Emission

The Astrophysical Journal
High-resolution spectroscopy (HRS) of exoplanet atmospheres has successfully detected many chemical species and is quickly moving toward detailed characterization of the chemical abundances and dynamics.
Lennart van Sluijs, Hayley Beltz, Isaac Malsky, Genevieve H. Pereira, L. Cinque, Emily Rauscher, Jayne Birkby   +6 more
doaj   +1 more source

Impact of oxygen fugacity on atmospheric structure and emission spectra of ultra hot rocky exoplanets [PDF]

Fabian L. Seidler, Paolo A. Sossi, Simon L. Grimm   +2 more
openalex   +1 more source