Results 71 to 80 of about 2,834 (210)

On the width and shape of the corotation region for low-mass planets

, 2009
We study the coorbital flow for embedded, low mass planets. We provide a simple semi-analytic model for the corotation region, which is subsequently compared to high resolution numerical simulations. The model is used to derive an expression for the half-
Artymowicz, Baruteau, Crida, D'Angelo, D'Angelo, Goldreich, Goldreich, J. C. B. Papaloizou, Korycansky, Korycansky, Lin, Masset, Masset, Mayor, Nelson, Ogilvie, Paardekooper, Paardekooper, Paardekooper, Paardekooper, Papaloizou, Pepliński, Pepliński, S.-J. Paardekooper, Tanaka, Ward, Ward   +26 more
core   +1 more source

Photophoresis boosts giant planet formation [PDF]

, 2013
In the core accretion model of giant planet formation, a solid protoplanetary core begins to accrete gas directly from the nebula when its mass reaches about 5 earth masses.
Dodson-Robinson, Sarah E., Teiser, Jens
core   +2 more sources

A Giant Impact Origin for the First Subduction on Earth

Geophysical Research Letters, Volume 51, Issue 9, 16 May 2024.
Abstract Hadean zircons provide a potential record of Earth's earliest subduction 4.3 billion years ago. It remains enigmatic how subduction could be initiated so soon after the presumably Moon‐forming giant impact (MGI). Earlier studies found an increase in Earth's core‐mantle boundary (CMB) temperature due to the accumulation of the impactor's core ...
Qian Yuan, Michael Gurnis, Paul D. Asimow, Yida Li   +3 more
wiley   +1 more source

Wide Separation Planets in Time (WISPIT): Discovery of a Gap Hα Protoplanet WISPIT 2b with MagAO-X

The Astrophysical Journal Letters
Excellent (
Laird M. Close, Richelle F. van Capelleveen, Gabriel Weible, Kevin Wagner, Sebastiaan Y. Haffert, Jared R. Males, Ilya Ilyin, Matthew A. Kenworthy, Jialin Li, Joseph D. Long, Steve Ertel, Christian Ginski, Alycia J. Weinberger, Kate Follette, Joshua Liberman, Katie Twitchell, Parker Johnson, Jay Kueny, Daniel Apai, Rene Doyon, Warren Foster, Victor Gasho, Kyle Van Gorkom, Olivier Guyon, Maggie Y. Kautz, Avalon McLeod, Eden McEwen, Logan Pearce, Lauren Schatz, Alexander D. Hedglen, Ya-Lin Wu, Jacob Isbell, Jenny Power, Jared Carlson, Emmeline Close, Elena Tonucci, Matthijs Mars   +36 more
doaj   +1 more source

Accreting protoplanets in the LkCa 15 transition disk [PDF]

Nature, 2015
35 pages, 3 figures, 1 table, 9 extended data ...
Sallum, S., Follette, K. B., Eisner, J. A., Close, L. M., Hinz, P., Kratter, K., Males, J., Skemer, A., Macintosh, B., Tuthill, P., Bailey, V., Defrere, Denis, Morzinski, K., Rodigas, T., Spalding, E., Vaz, A., Weinberger, A. J.   +16 more
openaire   +3 more sources

Die Suche nach kalten, fremden Welten

Physik in unserer Zeit, Volume 55, Issue 3, Page 140-147, May 2024.
Die meisten der heute bekannten extrasolaren Planeten umkreisen ihren Mutterstern auf engen Umlaufbahnen in weniger als 100 Tagen. Gesteinsplaneten mit größeren Bahnradien sind von herausragender Bedeutung für Theorien der Planetenentstehung. Die Mikrogravitationslinsenmethode bietet eine hervorragende Möglichkeit, solche Planeten zu finden – und das ...
Markus Hundertmark, Yiannis Tsapras
wiley   +1 more source

SPECTRAL ENERGY DISTRIBUTIONS OF ACCRETING PROTOPLANETS [PDF]

The Astrophysical Journal, 2015
Accepted for publication in ApJ ...
openaire   +2 more sources

Dynamics and Accretion of Planetesimals

, 2012
We review the basic dynamics and accretion of planetesimals by showing N-body simulations. The orbits of planetesimals evolve through two-body gravitational relaxation: viscous stirring increases the random velocity and dynamical friction realizes the ...
Ida, Shigeru, Kokubo, Eiichiro
core   +1 more source

A Post‐Launch Summary of the Science of NASA's Psyche Mission

AGU Advances, Volume 5, Issue 2, April 2024.
Abstract Astronomical observations indicate that asteroid (16) Psyche is a large, high‐density (likely >3,400 kg·m−3), metal‐rich (30–55 vol. %) asteroid. Psyche may be remnant core material or it could be a primordial, undifferentiated metal‐rich object.
Steven D. Dibb, Erik Asphaug, James F. Bell, Richard P. Binzel, William F. Bottke, Saverio Cambioni, John M. Christoph, Linda T. Elkins‐Tanton, Ralf Jaumann, David J. Lawrence, Rona Oran, Joseph G. O’Rourke, Carol Polansky, Benjamin P. Weiss, Mark Wieczorek, David. A. Williams   +15 more
wiley   +1 more source

VLT/MUSE Detection of the AB Aurigae b Protoplanet with Hα Spectroscopy

The Astrophysical Journal Letters
We analyze high-contrast, medium-spectral-resolution H _α observations of the star AB Aurigae using the Very Large Telescope's Multi Unit Spectroscopic Explorer (MUSE).
Thayne Currie, Jun Hashimoto, Yuhiko Aoyama, Ruobing Dong, Misato Fukagawa, Takayuki Muto, Erica Dykes, Mona El Morsy, Motohide Tamura   +8 more
doaj   +1 more source