Results 11 to 20 of about 114 (114)

Study of Atmospheric Ion Escape From Exoplanet TOI‐700 d: Venus Analogs

Journal of Geophysical Research: Space Physics, Volume 128, Issue 8, August 2023., 2023
Abstract TOI‐700 d is the first Earth‐sized planet in the habitable zone (HZ) discovered by the Transiting Exoplanet Survey Satellite. Here, we assess whether a Venus‐like exoplanet at the TOI‐700 d location could retain an atmosphere for a time comparable to the age of the host star based on multispecies magnetohydrodynamics simulations.
T. Nishioka, K. Seki, R. Sakata, K. Yamamoto, N. Terada, S. Sakai, H. Shinagawa, A. Nakayama   +7 more
wiley   +1 more source

Early Formation of a Water Ocean as a Function of Initial CO2 and H2O Contents in a Solidifying Rocky Planet

Journal of Geophysical Research: Planets, Volume 128, Issue 8, August 2023., 2023
Abstract We present a model for the thermal evolution of Magma Ocean (MO) in interaction with a degassing atmosphere of H2O and CO2. The interior model is based on parameterized convection and is coupled to the atmospheric Model of Marcq et al. (2017, https://doi.org/10.1002/2016JE005224) through heat and volatiles.
H. Massol, A. Davaille, P. Sarda
wiley   +1 more source

Aerosols in Exoplanet Atmospheres

Journal of Geophysical Research: Planets, Volume 126, Issue 4, April 2021., 2021
Abstract Observations of exoplanet atmospheres have shown that aerosols, like in the solar system, are common across a variety of temperatures and planet types. The formation and distribution of these aerosols are inextricably intertwined with the composition and thermal structure of the atmosphere.
Peter Gao, Hannah R. Wakeford, Sarah E. Moran, Vivien Parmentier   +3 more
wiley   +1 more source

Hot Jupiters: Origins, Structure, Atmospheres

Journal of Geophysical Research: Planets, Volume 126, Issue 3, March 2021., 2021
Abstract We provide a brief review of many aspects of the planetary physics of hot Jupiters. Our aim is to cover most of the major areas of current study while providing the reader with additional references for more detailed follow‐up. We first discuss giant planet formation and subsequent orbital evolution via disk‐driven torques or dynamical ...
Jonathan J. Fortney, Rebekah I. Dawson, Thaddeus D. Komacek   +2 more
wiley   +1 more source

The Fundamental Connections between the Solar System and Exoplanetary Science

Journal of Geophysical Research: Planets, Volume 126, Issue 2, February 2021., 2021
Abstract Over the past several decades, thousands of planets have been discovered outside our Solar System. These planets exhibit enormous diversity, and their large numbers provide a statistical opportunity to place our Solar System within the broader context of planetary structure, atmospheres, architectures, formation, and evolution.
Stephen R. Kane, Giada N. Arney, Paul K. Byrne, Paul A. Dalba, Steven J. Desch, Jonti Horner, Noam R. Izenberg, Kathleen E. Mandt, Victoria S. Meadows, Lynnae C. Quick   +9 more
wiley   +1 more source

Vertically Resolved Magma Ocean–Protoatmosphere Evolution: H2, H2O, CO2, CH4, CO, O2, and N2 as Primary Absorbers

Journal of Geophysical Research: Planets, Volume 126, Issue 2, February 2021., 2021
Abstract The earliest atmospheres of rocky planets originate from extensive volatile release during magma ocean epochs that occur during assembly of the planet. These establish the initial distribution of the major volatile elements between different chemical reservoirs that subsequently evolve via geological cycles.
Tim Lichtenberg, Dan J. Bower, Mark Hammond, Ryan Boukrouche, Patrick Sanan, Shang‐Min Tsai, Raymond T. Pierrehumbert   +6 more
wiley   +1 more source

Gaia search for stellar companions of TESS Objects of Interest

Astronomische Nachrichten, Volume 341, Issue 10, Page 996-1030, December 2020., 2020
The first results of a new survey, which explores the second data release of the ESA‐Gaia mission, are reported in order to search for stellar companions of (Community) TESS Objects of Interest and to characterize their properties. In total, 193 binary and 15 hierarchical triple star systems are presented, detected among 1,391 target stars, which are ...
Markus Mugrauer, Kai‐Uwe Michel
wiley   +1 more source

Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status

Astronomische Nachrichten, Volume 347, Issue 1, January 2026.
ABSTRACT We present new radial velocity measurements of 13 selected intermediate mass stars (2–6 M⊙). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the échelle spectrograph FLECHAS. The radial velocity of eight stars was found to be constant during our spectroscopic monitoring, namely: 17
J. Bätz, M. Mugrauer, K.‐U. Michel, J. Reichert, A. Tschirschky, L. Pietsch, F. Edelmann, R. Neuhäuser   +7 more
wiley   +1 more source

PERICLES: A Set of Empirical Rotational Isochrones Modeled on Cool Dwarfs in Open Clusters and Wide Binaries

Astronomische Nachrichten, Volume 347, Issue 1, January 2026.
ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley   +1 more source

A Brief Observational History of the Black‐Hole Spacetimes

Advances in Mathematical Physics, Volume 2015, Issue 1, 2015., 2015
In this year (2015), black holes (BHs) celebrate their 100th birthday, if their birth is taken to be triggered by a handwritten letter from Martin Schwarzschild to Albert Einstein, in connection with his newly found spherically symmetric vacuum solution.
Wolfgang Kundt, Seyed H. Hendi
wiley   +1 more source