Results 41 to 50 of about 307 (159)

Considering Contact Forces during the Formation of Planetesimals by Gravitational Collapse: Mutual Orbits, Spin States, and Shapes

The Astrophysical Journal
In this work, we apply a soft-sphere discrete element method (SSDEM) within the PKDGRAV N -body integrator to investigate the formation of planetesimal systems through the gravitational collapse of clouds of superparticles. Previously published numerical
Jackson T. Barnes, Stephen R. Schwartz, Seth A. Jacobson   +2 more
doaj   +1 more source

Ray and Halo Impact Craters on Ganymede: Fingerprint for Decoding Ganymede's Crustal Structure

Earth and Space Science, Volume 11, Issue 9, September 2024.
Abstract Impact craters are a unique tool not only for inferring ages of planetary surfaces and examining geological processes, but also for exploring subsurface properties. We use ejecta blankets as proxies to obtain insights into the subsurface characteristics and the vertical stratification of Ganymede's icy crust.
N. R. Baby, T. Kenkmann, K. Stephan, R. J. Wagner, E. Hauber   +4 more
wiley   +1 more source

Extent of alteration, paleomagnetic history, and infrared spectral properties of the Tarda ungrouped carbonaceous chondrite

Meteoritics &Planetary Science, Volume 59, Issue 9, Page 2411-2431, September 2024.
Abstract Tarda is an ungrouped, hydrated carbonaceous chondrite (C2‐ung) that was seen to fall in Morocco in 2020. Early studies showed that Tarda chemically resembles another ungrouped chondrite, Tagish Lake (C2‐ung), which has previously been linked to the dark D‐type asteroids.
H. C. Bates, R. Aspin, C. Y. Fu, C. S. Harrison, E. Feaver, E. Branagan‐Harris, A. J. King, J. F. J. Bryson, S. Sridhar, C. I. O. Nichols   +9 more
wiley   +1 more source

heliostack: A Novel Approach to Minor Planet Discovery

The Planetary Science Journal
The study of faint solar system objects is a promising avenue for understanding the origin and evolution of planetary systems. However, such objects are difficult to detect in conventional surveys.
Kevin J. Napier, Matthew J. Holman, Hsing Wen Lin, David W. Gerdes, Thomas R. Ruch   +4 more
doaj   +1 more source

Runaway Growth During Planet Formation: Explaining the Size Distribution of Large Kuiper Belt Objects [PDF]

, 2011
Runaway growth is an important stage in planet formation during which large protoplanets form, while most of the initial mass remains in small planetesimals.
Hilke E. Schlichting, Re'em Sari, Schlichting, Hilke E., Sari, Re'em   +3 more
core   +1 more source

The DECam Ecliptic Exploration Project (DEEP). VI. First Multiyear Observations of Trans-Neptunian Objects

The Astronomical Journal
We present the first set of trans-Neptunian objects (TNOs) observed on multiple nights in data taken from the DECam Ecliptic Exploration Project. Of these 110 TNOs, 105 do not coincide with previously known TNOs and appear to be new discoveries.
Hayden Smotherman, Pedro H. Bernardinelli, Stephen K. N. Portillo, Andrew J. Connolly, J. Bryce Kalmbach, Steven Stetzler, Mario Jurić, Dino Bektešević, Zachary Langford, Fred C. Adams, William J. Oldroyd, Matthew J. Holman, Colin Orion Chandler, Cesar Fuentes, David W. Gerdes, Hsing Wen Lin, Larissa Markwardt, Andrew McNeill, Michael Mommert, Kevin J. Napier, Matthew J. Payne, Darin Ragozzine, Andrew S. Rivkin, Hilke Schlichting, Scott S. Sheppard, Ryder Strauss, David E. Trilling, Chadwick A. Trujillo   +27 more
doaj   +1 more source

Characterizing Hydrated Sulfates and Altered Phases in Jezero Crater Fan and Floor Geologic Units With SHERLOC on Mars 2020

Journal of Geophysical Research: Planets, Volume 129, Issue 7, July 2024.
Abstract The Mars 2020 Perseverance rover has explored fluvio‐lacustrine sedimentary rocks within Jezero crater. Prior work showed that igneous crater floor Séítah and Máaz formations have mafic mineralogy with alteration phases that indicate multiple episodes of aqueous alteration.
Yu Yu Phua, Bethany L. Ehlmann, Sandra Siljeström, Andrew D. Czaja, Pierre Beck, Stephanie Connell, Roger C. Wiens, Ryan S. Jakubek, Rebecca M. E. Williams, Maria‐Paz Zorzano, Michelle E. Minitti, Alyssa C. Pascuzzo, Kevin P. Hand, Rohit Bhartia, Linda C. Kah, Lucia Mandon, Joseph Razzell Hollis, Eva L. Scheller, Sunanda Sharma, Andrew Steele, Kyle Uckert, Kenneth H. Williford, Anastasia G. Yanchilina   +22 more
wiley   +1 more source

OSSOS finds an Exponential Cutoff in the Size Distribution of the Cold Classical Kuiper belt

, 2021
International audienceThe cold main classical Kuiper Belt consists of the nonresonant small solar system bodies with low orbital inclinations and orbital semimajor axes between 42.4 and 47.7 au. These objects likely formed in situ, and the population has
Alexandersen, Mike, Bannister, M.T., Gwyn, Stephen, D J, Gladman, Brett, Chen, Y.-T., Gladman, B., Bannister, Michele, T, Kavelaars, J.J., Alexandersen, M., Volk, K., Gwyn, S.D.J., Petit, J.-M., Petit, Jean-Marc, C., Chen, Ying-Tung, Kavelaars, J, J, Volk, Kathryn   +15 more
core   +1 more source

Col-OSSOS: Investigating the Origins of Different Surfaces in the Primordial Kuiper Belt

The Planetary Science Journal
The Colours of the Outer Solar System Origins Survey (Col-OSSOS) measured the optical/near-IR colors of a brightness-complete sample of trans-Neptunian objects (TNOs).
Laura E. Buchanan, Megan E. Schwamb, Wesley C. Fraser, Michele T. Bannister, J. J. Kavelaars, Michaël Marsset, Rosemary E. Pike, David Nesvorný, Samantha M. Lawler, Susan D. Benecchi, Nuno Peixinho, Nicole J. Tan, Kathryn Volk, Mike Alexandersen, Jean-Marc Petit   +14 more
doaj   +1 more source

Not So Fast: A New Catalog of Meteor Persistent Trains

Journal of Geophysical Research: Space Physics, Volume 129, Issue 7, July 2024.
Abstract This paper presents the results of a nearly 2‐year long campaign to detect and analyze meteor persistent trains (PTs)—self‐emitting phenomena which can linger up to an hour after their parent meteor. The modern understanding of PTs has been primarily developed from the Leonid storms at the turn of the century; our goal was to assess the ...
L. E. Cordonnier, K. S. Obenberger, J. M. Holmes, G. B. Taylor, D. Vida   +4 more
wiley   +1 more source