Results 101 to 110 of about 8,504 (191)

Percolative sulfide core formation in oxidized planetary bodies

Nature Communications
Models of planetary core formation traditionally involve the fractionation of Fe,Ni-metal melts from silicate mantles after extensive silicate melting.
Samuel D. Crossley, Jacob B. Setera, Brendan A. Anzures, Kayla Iacovino, Wayne P. Buckley, Scott A. Eckley, Evan W. O’Neal, Jessica A. Maisano, Justin I. Simon, Kevin Righter   +9 more
doaj   +1 more source

A tidally detached super Neptune on a strongly misaligned retrograde orbit

Astronomy & Astrophysics
The obliquity between a planet’s orbital axis and its host star’s spin axis provides crucial insights into planetary formation and migration. Planets with scaled semi-major axes (a/R★) large enough to be unaffected by tidal alterations (‘tidally detached’
Mantovan G., Malavolta L., Lanza A. F., Marzari F., Naponiello L., Biazzo K., Cosentino R., D’Arpa M. C., Desidera S., Guilluy G., Nardiello D., Sozzetti A., Vissapragada S., Aloisi R., Benatti S., Borsato L., Claudi R., Jenkins S., Nascimbeni V., Piotto G., Zingales T.   +20 more
doaj   +1 more source

Planetary Migration and Plutino Orbital Inclinations

The Astronomical Journal, 2000
I investigate which mechanisms could have acted during Neptune's past radial migration to excite plutino orbital inclinations to their present values. These processes include Kozai resonance and the ν18 secular resonance, both before and after the plutino's capture into the 2 : 3 mean motion resonance with Neptune. In the case that ν18 acted before the
openaire   +1 more source

TOI-3862 b: A dense super-Neptune deep in the hot Neptune desert

Astronomy & Astrophysics
Context. The structure and evolution of close-in exoplanets are shaped by atmospheric loss and migration processes, which give rise to key population features such as the hot Neptune desert, ridge, and savanna – regions of the period-radius space whose ...
Carleo Ilaria, Castro-González Amadeo, Pallé Enric, Murgas Felipe, Nowak Grzegorz, Lacedelli Gaia, Masseron Thomas, Wong Emily W., Eggenberger Patrick, Bourrier Vincent, Jankowski Dawid, Goździewski Krzysztof, Alves Douglas R., Jenkins James S., Messina Sergio, Stassun Keivan G., Vines Jose I., Brogi Matteo, Ciardi David R., Clark Catherine A., Cochran William, Collins Karen A., Deeg Hans J., Furlan Elise, Gandolfi Davide, Geraldía González Samuel, Hatzes Artie P., Hellier Coel, Howell Steve B., Korth Judith, Lillo-Box Jorge, Livingston John H., Orell-Miquel Jaume, Persson Carina M., Redfield Seth, Safonov Boris, Baker David, Delfin Barrena Delgado Rafael, Bieryla Allyson, Boyle Andrew, Bosch-Cabot Pau, Casasayas Barris Núria, Chairetas Stavros, de Leon Jerome P., Fukuda Izuru, Fukui Akihiko, Guerra Pere, Ikuta Kai, Kawauchi Kiyoe, Knudstrup Emil, Libotte Florence, Lund Michael B., Luque Rafael, Guerrero de Escalante Eduardo Lorenzo Martín, Massey Bob, Michaels Edward J., Morello Giuseppe, Narita Norio, Parvianien Hannu, Schwarz Richard P., Shporer Avi, Stangret Monika, Watanabe Noriharu, Watkins Cristilyn N.   +63 more
doaj   +1 more source

Numerical simulations of type III planetary migration [Elektronisk resurs] [PDF]

, 2008
Planets are believed to form in primordial gas-dust discs surrounding newborn stars. An important breakthrough in our understanding of planetary formation was the discovery of extra-solar planets around sun-like stars, especially the frequent occurrence ...
Mellema, Garrelt,, Peplinski, Adam,, Artymowicz, Pawel, Papaloizou, John,   +3 more
core  

Large Fluctuations within 1 au in Protoplanetary Disks

The Astrophysical Journal
Protoplanetary disks are often assumed to change slowly and smoothly during planet formation. Here, we investigate the time evolution of isolated disks subject to viscosity and a disk wind. The viscosity is assumed to increase rapidly at around 900 K due
John Chambers
doaj   +1 more source

Effects of Thermodynamics on the Concurrent Accretion and Migration of Gas Giants in Protoplanetary Disks

Universe
Accretion and migration usually proceed concurrently for giant planet formation in the natal protoplanetary disks. Recent works indicate that the concurrent accretion onto a giant planet imposes significant impact on the planetary migration dynamics in ...
Hening Wu, Ya-Ping Li
doaj   +1 more source

Orbital Migration Through Atmospheric Mass Loss

The Astronomical Journal
Atmospheric mass loss is thought to have strongly shaped the sample of close-in exoplanets. These atmospheres should be lost isotropically, leading to no net migration on the planetary orbit.
Benjamin Hanf, William Kincaid, Hilke Schlichting, Livan Cappiello, Daniel Tamayo   +4 more
doaj   +1 more source

Study of the secular paths of planetary migration [PDF]

As descobertas de sistemas extrassolares mostraram que a configuração do nosso Sistema Solar foge do paradigma quando pensamos em modelo de sistema planetário, colocando à prova os nossos conhecimentos sobre a formação e evolução planetária. Desta forma,
Sanches, Eduardo Verrone
core   +1 more source

Predicting the Dominant Formation Mechanism of Multiplanetary Systems

The Astrophysical Journal Letters
Most, if not all, Sun-like stars host one or more planets, making multiplanetary systems commonplace in our Galaxy. We utilize hundreds of multiplanet simulations to explore the origin of such systems, focusing on their orbital architecture.
Cheyanne Shariat, Yasuhiro Hasegawa, Bradley M. S. Hansen, Tze Yeung Mathew Yu, Renyu Hu   +4 more
doaj   +1 more source