Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Extrasolar gaseous planets"'
We review our present understanding of the physical properties of substellar objects, brown dwarfs and irradiated or non-irradiated gaseous exoplanets. This includes a description of their internal properties, mechanical structure and heat content, t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0401608
Autor:
Henrik Knierim, Ravit Helled
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 2, p 227 (2024)
Linking atmospheric measurements to the bulk planetary composition and ultimately the planetary origin is a key objective in planetary science. In this work, we identify the cases in which the atmospheric composition represents the bulk composition.
Externí odkaz:
https://doaj.org/article/da59828568ad4dfc80a3e8adcc56571d
Autor:
Colin D. Hamill, Alexandria V. Johnson, Natasha Batalha, Rowan Nag, Peter Gao, Danica Adams, Tiffany Kataria
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 181 (2024)
Examining reflected light from exoplanets aids in our understanding of the scattering properties of their atmospheres and will be a primary task of future flagship space- and ground-based telescopes. We introduce an enhanced capability of Planetary I
Externí odkaz:
https://doaj.org/article/afe8e7a41b67499e97b85b2091353a27
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 238 (2024)
Observed high multiplicity planetary systems are often tightly packed. Numerical studies indicate that such systems are susceptible to dynamical instabilities. Dynamical instabilities in close-in tightly packed systems, similar to those found in abun
Externí odkaz:
https://doaj.org/article/19ba3d0047984d528b62e00ff9010333
Autor:
David K. Sing, Thomas M. Evans-Soma, Zafar Rustamkulov, Joshua D. Lothringer, Nathan J. Mayne, Kevin C. Schlaufman
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 231 (2024)
We have conducted a planetary radial velocity measurement of the ultrahot Jupiter WASP-121b using JWST NIRSpec phase curve data. Our analysis reveals the Doppler shift of the planetary spectral lines across the full orbit, which shifts considerably a
Externí odkaz:
https://doaj.org/article/a33985f33a2547b68b5012bf72441b7d
Autor:
Ziyu Huang, Xinting Yu, Shang-Min Tsai, Julianne I. Moses, Kazumasa Ohno, Joshua Krissansen-Totton, Xi Zhang, Jonathan J. Fortney
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 146 (2024)
Understanding the surface temperature and interior structure of cold-to-temperate sub-Neptunes is critical for assessing their habitability, yet direct observations are challenging. In this study, we investigate the impact of water condensation on th
Externí odkaz:
https://doaj.org/article/bccd8e9c17fc4f91a21a2256846d2a61
Autor:
Dwaipayan Dubey, Liton Majumdar
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 165 (2024)
In the era of state-of-the-art space-borne telescopes, high-resolution ground-based observation has emerged as a crucial method for characterizing exoplanets, providing essential insights into their atmospheric compositions. In the optical and near-i
Externí odkaz:
https://doaj.org/article/e73d079de97e471da1a8d8c724833679
Autor:
Bibiana Prinoth, Elyar Sedaghati, Julia V. Seidel, H. Jens Hoeijmakers, Rafael Brahm, Brian Thorsbro, Andrés Jordán
Publikováno v:
The Astronomical Journal, Vol 168, Iss 3, p 133 (2024)
Warm Jupiters are ideal laboratories for testing the limitations of current tools for atmospheric studies. The cross-correlation technique is a commonly used method to investigate the atmospheres of close-in planets, leveraging their large orbital ve
Externí odkaz:
https://doaj.org/article/8a45c7ccc761420098851d288d297d1d
Autor:
Munazza K. Alam, James Kirk, Leonardo A. Dos Santos, Patrick McCreery, Andrew P. Allan, James E. Owen, Aline A. Vidotto, Romain Allart, Vincent Bourrier, Néstor Espinoza, George W. King, Mercedes López-Morales, Julia V. Seidel
Publikováno v:
The Astronomical Journal, Vol 168, Iss 3, p 102 (2024)
We search for excess in-transit absorption of neutral helium at 1.083 μ m in the atmospheres of the young (
Externí odkaz:
https://doaj.org/article/8d75c3a49d494ca8aab11b848346bad3
Autor:
Jens Kammerer, Kellen Lawson, Marshall D. Perrin, Isabel Rebollido, Christopher C. Stark, Tomas Stolker, Julien H. Girard, Laurent Pueyo, William O. Balmer, Kadin Worthen, Christine Chen, Roeland P. van der Marel, Nikole K. Lewis, Kimberly Ward-Duong, Jeff A. Valenti, Mark Clampin, C. Matt Mountain
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 51 (2024)
We present the first JWST/NIRCam observations of the directly imaged gas giant exoplanet β Pic b. Observations in six filters using NIRCam's round coronagraphic masks provide a high-signal-to-noise-ratio detection of β Pic b and the archetypal debr
Externí odkaz:
https://doaj.org/article/7fd2f829024c45b6934fc6e3be2531c4