Results 101 to 110 of about 2,175 (190)

TOI-4438 b: a transiting mini-Neptune amenable to atmospheric characterization

Astronomy & Astrophysics
We report the confirmation and mass determination of a mini-Neptune transiting the M3.5 V star TOI-4438 (G 182-34) every 7.44 days. A transit signal was detected with NASA’s TESS space mission in the sectors 40, 52, and 53. In order to validate the planet TOI-4438 b and to determine the system properties, we combined TESS data with high-precision ...
Goffo, Elisa, Morello, Giuseppe, Peña-Moñino, Luis, Pozuelos, Francisco J., Caballero, J. A., Pérez-Torres, Miguel A., Cifuentes, C., Herrero, Enrique, Amado, Pedro J., Lillo-Box, Jorge, Luque, Rafael, Ribas, Ignasi, Tabernero, H. M.   +12 more
openaire   +9 more sources

Utilizing Machine Learning to Predict Host Stars and the Key Elemental Abundances of Small Planets

The Astronomical Journal
Stars and their associated planets originate from the same cloud of gas and dust, making a star’s elemental composition a valuable indicator for indirectly studying planetary compositions. While the connection between a star’s iron (Fe) abundance and the
Amílcar R. Torres-Quijano, Natalie R. Hinkel, Caleb H. Wheeler III, Patrick A. Young, Luan Ghezzi, Augusto P. Baldo   +5 more
doaj   +1 more source

A Mini-Neptune from TESS and CHEOPS Around the 120 Myr Old AB Dor Member HIP 94235 [PDF]

, 2022
George Zhou, Christopher P. Wirth, Chelsea X. Huang, Alexander Venner, Kyle Franson, Samuel N. Quinn, Luke G. Bouma, Adam L. Kraus, Andrew W. Mann, Elisabeth Newton, Diana Dragomir, A. Heitzmann, Nataliea Lowson, Stephanie T. Douglas, Matthew P. Battley, Edward Gillen, A. H. M. J. Triaud, David W. Latham, Steve B. Howell, J. D. Hartman, Benjamin M. Tofflemire, Robert A. Wittenmyer, Brendan P. Bowler, Jonathan Horner, Stephen R. Kane, John F. Kielkopf, Peter Plavchan, D. J. Wright, Brett Addison, Matthew W. Mengel, Jack Okumura, G. Ricker, R. Vanderspek, Sara Seager, Jon M. Jenkins, Joshua N. Winn, Tansu Daylan, Michael Fausnaugh, Michelle Kunimoto   +38 more
openalex   +1 more source

A Comprehensive Reanalysis of K2-18 b’s JWST NIRISS+NIRSpec Transmission Spectrum

The Astronomical Journal
Sub-Neptunes are the most common type of planet in our galaxy. Interior structure models suggest that the coldest sub-Neptunes could host liquid water oceans underneath their hydrogen envelopes—sometimes called “hycean” planets. JWST transmission spectra
Stephen P. Schmidt, Ryan J. MacDonald, Shang-Min Tsai, Michael Radica, Le-Chris Wang, Eva-Maria Ahrer, Taylor J. Bell, Chloe Fisher, Daniel P. Thorngren, Nicholas Wogan, Erin M. May, Piero Ferrari, Katherine A. Bennett, Zafar Rustamkulov, Mercedes López-Morales, David K. Sing   +15 more
doaj   +1 more source

Planetary population synthesis and the emergence of four classes of planetary system architectures. [PDF]

Eur Phys J Plus, 2023
Emsenhuber A, Mordasini C, Burn R.
europepmc   +1 more source

Carbon-rich Sub-Neptune Interiors Are Compatible with JWST Observations

The Astrophysical Journal Letters
Many possible interior compositions exist for sub-Neptunes: ice-poor, ice-rich, and water-dominated interiors can all match the measured masses and radii. Motivated by a recent theory of carbon-rich planet formation outside the refractory organic carbon “
Zifan Lin, Sara Seager
doaj   +1 more source

Salty ice and the dilemma of ocean exoplanet habitability. [PDF]

Nat Commun, 2022
Journaux B.
europepmc   +1 more source

The Nature and Origins of Sub-Neptune Size Planets. [PDF]

J Geophys Res Planets, 2021
Bean JL, Raymond SN, Owen JE.
europepmc   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

Toward a Self-consistent Evaluation of Gas Dwarf Scenarios for Temperate Sub-Neptunes

The Astrophysical Journal
The recent JWST detections of carbon-bearing molecules in a habitable-zone sub-Neptune have opened a new era in the study of low-mass exoplanets. The sub-Neptune regime spans a wide diversity of planetary interiors and atmospheres not witnessed in the ...
Frances E. Rigby, Lorenzo Pica-Ciamarra, Måns Holmberg, Nikku Madhusudhan, Savvas Constantinou, Laura Schaefer, Jie Deng, Kanani K. M. Lee, Julianne I. Moses   +8 more
doaj   +1 more source