Results 51 to 60 of about 665 (145)

Exhumed eo‐Alpine High‐Pressure Rocks Fed Campanian Turbidites in Eastern Sardinia

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract This study investigates the detrital record of the early orogenic evolution of the Sardinia‐Calabria system, preserved in Upper Cretaceous arenites exposed in eastern Sardinia. Sardinia and Corsica form a continental block that includes a segment of the Alpine orogen and of its former foreland basin.
Francesco Massari, Maria Giuditta Fellin, Cristina Stefani, Eva Enkelmann, Iginio Dieni, Stefano Sanchetti   +5 more
wiley   +1 more source

Features in the Visible Spectra of the Enceladus Particle Plume and E Ring: Potential Evidence of Organic Materials and/or Missing Sub‐Micron Particles

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Visible spectra of the Enceladus particle plume and E ring contain evidence for a change in spectral slope around 0.5 μm. This feature can be seen in data obtained by both the Visual and Infrared Mapping Spectrometer and Imaging Science Subsystem onboard the Cassini Spacecraft, and is consistent with the slope change seen in the surface ...
M. M. Hedman, S. M. MacKenzie
wiley   +1 more source

Mechanical Properties of Dust, Pebbles, and Planetesimals Based on Johnson–Kendall–Roberts, Griffith, and Weibull Theories

The Astrophysical Journal
Mechanical properties of small bodies such as dust, pebbles, and planetesimals are key to better understanding the formation of planetary systems against their collisional destruction.
Hiroshi Kimura, Takaya Okamoto, Takayuki Hirai, Fumi Yoshida, Peng K. Hong, Koji Wada, Tomoko Arai, Eiichiro Kokubo, Yuki Yoshida, Toshihiko Kadono, Sota Arakawa, Hiroki Senshu, Masanori Kobayashi, Ko Ishibashi, Manabu Yamada, Hiroshi Akitaya, Osamu Okudaira, Takafumi Matsui   +17 more
doaj   +1 more source

Subglacial Lake Discharge Affects the Age and Concentration Distribution of Dissolved Organic Carbon in Ross Sea Surface Waters

AGU Advances, Volume 7, Issue 5, August 2026.
Abstract The Ross Sea continental shelf plays a key role in the global carbon cycle. However, the sources and cycling of dissolved organic carbon (DOC) in the region are poorly understood. Here, we determined the radiocarbon (14C) and stable carbon isotope (13C) contents of DOC in addition to those of dissolved inorganic carbon (DIC) in the Little ...
Sunmin Oh, Yeongjin Ryu, Heejun Han, Taehee Na, Tae‐Wan Kim, Jisoo Park, Guebuem Kim, Ellen R. M. Druffel, Jeomshik Hwang   +8 more
wiley   +1 more source

Tensile Strength of Dust, Pebbles, and Planetesimals: A Simple Mathematical Formula from Aggregates to Monoliths Based on an Extension of an Elastic Theory for Particle Assemblies to Molecular Networks

The Astrophysical Journal
The tensile strength of solid particles is the key parameter that controls not only the formation of planetesimals in protoplanetary disks but also outburst and splitting of comets and rotational bursting of asteroids in planetary systems.
Hiroshi Kimura, Takayuki Hirai, Takaya Okamoto, Akiko M. Nakamura, Eiichiro Kokubo, Yuki Yoshida, Fumi Yoshida, Peng K. Hong, Koji Wada, Hiroki Senshu, Tomoko Arai, Sota Arakawa, Toshihiko Kadono, Masanori Kobayashi, Ko Ishibashi, Hiroshi Akitaya, Manabu Yamada, Osamu Okudaira, Takafumi Matsui   +18 more
doaj   +1 more source

AI Based Velocity Calibration for Cassini's Cosmic Dust Analyzer (CDA)

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract This paper presents a novel AI‐based velocity calibration method for the Cosmic Dust Analyzer (CDA) onboard the Cassini spacecraft, in particular for impacts on the large Impact Ionization Detector (IID). The legacy polynomial calibration function, derived from laboratory measurements at a dust accelerator facility, assigns a velocity ...
Thomas Albin, Jonas Simolka, Ralf Srama
wiley   +1 more source

Dust Growth in ALMA Rings. II. Dusty Rossby Wave Instability

The Astrophysical Journal
Annular substructures serve as ideal venues for planetesimal formation. In this series, we investigate the linear stage of dust growth within rings. The first paper in this series examines the global streaming instability, while this study focuses on the
Can Cui, Konstantin Gerbig, Ya-Ping Li, Ziyan Xu, Rixin Li, Cong Yu, Min-Kai Lin, Feng Yuan   +7 more
doaj   +1 more source

Emirates Exploration Imager (EXI) Reveals Crater and Boulder Distribution on Deimos: Insights Into Its Dynamical and Geological Evolution

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Deimos, the smaller and outer Martian moon, is a dark, irregularly shaped body whose origin and evolution are still poorly constrained. Its surface is smoother and less cratered than the other moon, Phobos, a difference still unexplained due to limited data coverage and resolution.
Y. Shimizu, R. H. Hoover, K. Hotta, N. R. Alsaeed, W. F. Bottke, C. S. Edwards, H. Kikuchi, H. Miyamoto, M. M. Osterloo, P. Michel, S. J. Robbins   +10 more
wiley   +1 more source

Probing the Subparsec Dust of a Supermassive Black Hole with the Tidal Disruption Event AT 2020mot

The Astrophysical Journal
AT 2020mot is a typical UV/optical tidal disruption event (TDE) with no radio or X-ray signatures in a quiescent host. We find an i -band excess and rebrightening along the decline of the light curve which could be due to two consecutive dust echoes from
Megan Newsome, Iair Arcavi, D. Andrew Howell, Jamison Burke, Kishalay De, Yael Dgany, Sara Faris, Joseph Farah, Daichi Hiramatsu, Curtis McCully, Estefania Padilla-Gonzalez, Craig Pellegrino, Giacomo Terreran   +12 more
doaj   +1 more source

Exploring Polarized Millimeter Emission from Protoplanetary Disks with Irregular Dust Grains

The Astrophysical Journal
Polarization at millimeter wavelengths provides a powerful diagnostic of dust grain properties in protoplanetary disks. Standard models based on solid spherical grains often struggle to reproduce the observed polarization fractions and morphologies in ...
Jesús Miguel Jáquez-Domínguez, Carlos Carrasco-González, Daniel Guirado, Olga Muñoz, Enrique Macías, Gonzalo Vargas, Julia Martikainen   +6 more
doaj   +1 more source