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We extend the Sonora Diamondback brown dwarf evolution models to higher effective temperatures to treat the evolution of younger, higher mass objects. Due to an upper temperature limit of $T_\mathrm{eff}=$2400 K in the original Sonora…

We used {\sl \textup{ab initio}} molecular dynamics simulations to calculate the high-pressure melting temperatures of the three potential core components. The planetary adiabats were obtained by solving the hydrostatic equations in a…

Earth and Planetary Astrophysics · Physics 2019-10-30 S. Mazevet , R. Musella , F. Guyot

Sub-Neptunes are the most common type of detected exoplanet, yet their observed masses and radii are degenerate with several interior structures. One possibility is that sub-Neptunes have silicate/iron interiors and H$_2$-dominated…

Earth and Planetary Astrophysics · Physics 2026-04-27 Robb Calder , Oliver Shorttle , Harrison Nicholls , Tim Lichtenberg , Claire-Marie Guimond

Recent studies of the atmospheres of carbon-rich (DQ) white dwarfs have demonstrated the existence of two different populations that are distinguished by the temperature range, but more importantly, by the extremely high masses of the…

Solar and Stellar Astrophysics · Physics 2020-03-25 D. Koester , S. O. Kepler , A. W. Irwin

Modeling the formation of the ice giants Uranus and Neptune is a long-lasting problem in planetary science. Due to gas-drag, collisional damping, and resonant shepherding, the planetary embryos repel the planetesimals away from their reach…

Earth and Planetary Astrophysics · Physics 2015-05-28 M. Jakubik , A. Morbidelli , L. Neslusan , R. Brasser

We construct new models of outer heat blanketing envelopes of neutron stars composed of binary ion mixtures (H - He, He - C, C - Fe) in and out of diffusive equilibrium. To this aim, we generalize our previous work on diffusion of ions in…

Solar and Stellar Astrophysics · Physics 2016-04-26 M. V. Beznogov , A. Y. Potekhin , D. G. Yakovlev

There have been many proposed explanations for the larger-than-expected radii of some transiting hot Jupiters, including either stellar or orbital energy deposition deep in the atmosphere or deep in the interior. In this paper, we explore…

Earth and Planetary Astrophysics · Physics 2015-06-15 David S. Spiegel , Adam Burrows

Various theories have been proposed to explain the Moon's current inclined orbit. We test the viability of these theories by reconstructing the thermal-orbital history of the Moon. We build on past thermal-orbital models and incorporate the…

Earth and Planetary Astrophysics · Physics 2022-09-23 Brynna G. Downey , Francis Nimmo , Isamu Matsuyama

The formation of a compact accretion disk following a tidal disruption event (TDE) requires that the shocked stellar debris cool efficiently as it settles toward the black hole. While recent simulations suggest that stream dissipation…

High Energy Astrophysical Phenomena · Physics 2025-12-18 Semih Tuna , Brian D. Metzger , Yan-Fei Jiang , Andrea Antoni

Post equinox imaging of Uranus by HST, Keck, and Gemini telescopes has enabled new measurements of winds over previously sampled latitudes as well as measurements at high northern latitudes that have recently come into better view. These…

Earth and Planetary Astrophysics · Physics 2015-03-03 Lawrence Sromovsky , Patrick Fry , Heidi Hammel , Imke de Pater , Kathy Rages

We have been using Keck laser guide star adaptive optics to monitor the orbits of ultracool binaries, providing dynamical masses at lower luminosities and temperatures than previously available and enabling strong tests of theoretical…

Solar and Stellar Astrophysics · Physics 2009-12-07 Trent J. Dupuy , Michael C. Liu , Michael J. Ireland

We consider, in general terms, the early thermal evolution of an isolated neutron star, i.e., during the first $10^5$ years after the supernova explosion when the cooling is driven by neutrino emission from the core. It is shown that, if…

Astrophysics · Physics 2011-04-15 Dany PAGE

Aims. We track the time evolution of planet traps and snowlines in a viscously evolving protoplanetary disk using an opacity table that accounts for the composition of the dust material. Methods. We coupled a dynamical and thermodynamical…

Earth and Planetary Astrophysics · Physics 2015-05-06 Kévin Baillié , Sébastien Charnoz , Éric Pantin

We examine the linear stability and nonlinear growth of the thermal instability in isobarically contracting gas with various metallicities and FUV field strengths. When the H2 cooling is suppressed by FUV fields (G_0>10^-3) or the…

Astrophysics of Galaxies · Physics 2015-05-27 Tsuyoshi Inoue , Kazuyuki Omukai

Modelling of crust heating and cooling across multiple accretion outbursts of the low mass X-ray binary MXB 1659-29 indicates that the neutrino luminosity of the neutron star core is consistent with direct Urca reactions occurring in $\sim…

High Energy Astrophysical Phenomena · Physics 2022-10-21 Melissa Mendes , Farrukh J. Fattoyev , Andrew Cumming , Charles Gale

The thermal fit to preliminary HADES data of Au+Au collisions at $\sqrt{s_{_{NN}}}=2.4$ GeV shows two degenerate solutions at $T\approx50$ MeV and $T\approx70$ MeV. The analysis of the same particle yields in a transport simulation of the…

High Energy Physics - Phenomenology · Physics 2021-10-06 Anton Motornenko , Jan Steinheimer , Volodymyr Vovchenko , Reinhard Stock , Horst Stoecker

The possibility of a neutron m=2-superfluid in the interior of neutron stars is investigated. This pairing state is energetically favoured in strong magnetic fields ($H\sim 10^{16}-10^{17}$ G). Because of the node in the angular-dependent…

Astrophysics · Physics 2016-08-30 Ch. Schaab , F. Weber , M. K. Weigel

Giant planets acquire gas, ices and rocks during the early formation stages of planetary systems and thus inform us on the formation process itself. Proceeding from inside out, examining the connections between the deep interiors and the…

Earth and Planetary Astrophysics · Physics 2022-05-10 Tristan Guillot , Leigh N. Fletcher , Ravit Helled , Masahiro Ikoma , Michael R. Line , Vivien Parmentier

We present the current status of the analytic theory of brown dwarf evolution and the lower mass limit of the hydrogen burning main sequence stars. In the spirit of a simplified analytic theory we also introduce some modifications to the…

Solar and Stellar Astrophysics · Physics 2016-10-26 Sayantan Auddy , Shantanu Basu , S. R. Valluri
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