Results 81 to 90 of about 394,629 (288)

A primitive asteroid that lived fast and died young sampled by a xenolith in the Cold Bokkeveld CM2 carbonaceous chondrite

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 464-483, March 2025.
Abstract Xenoliths in carbonaceous chondrites include lithologies that are unrepresented in the meteorite record and so are a rich source of information on asteroid diversity. Cold Bokkeveld is a CM2 regolith breccia that contains both hydrous and anhydrous lithic clasts. Here, we describe a hydrous clast with a fine‐grained rim.
Martin R. Lee, Cameron J. Floyd, Robin Haller, Sammy Griffin   +3 more
wiley   +1 more source

Mid‐infrared detection and characterization of refractory inclusions in CM and CO chondrites: A non‐destructive approach for returned space samples

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 544-569, March 2025.
Abstract Refractory inclusions (RIs) in chondrites are widely used as tracers of early solar system formation conditions. In the context of sample‐return missions, a non‐destructive and non‐invasive analytical tool that can rapidly detect and characterize RIs in space samples during their early phase of study is highly needed.
Jean Charlier, Alice Aléon‐Toppani, Rosario Brunetto, Jérôme Aléon, Ferenc Borondics   +4 more
wiley   +1 more source

Zooming in on the Formation of Protoplanetary Disks [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractWe use the adaptive mesh refinement code RAMSES to model the formation of protoplanetary disks in realistic star formation environments. The resolution scales over up to 29 powers of two (~ 9 orders of magnitude) covering a range from outer scales of 40 pc to inner scales of 0.015 AU. The accretion rate from a 1.5 solar mass envelope peaks near
Nordlund, Åke, Haugbølle, Troels, Küffmeier, Michael, Paodoan, Paolo, Vasileiades, Aris   +4 more
openaire   +4 more sources

The ALMA Survey of Gas Evolution of PROtoplanetary Disks (AGE-PRO). X. Dust Substructures, Disk Geometries, and Dust-disk Radii

The Astrophysical Journal
We perform visibility fitting to the dust continuum Band 6 1.3 mm data of the 30 protoplanetary disks in the Atacama Large Millimeter/submillimeter Array Survey of Gas Evolution of PROtoplanetary Disks (AGE-PRO) Large Program.
Miguel Vioque, Nicolás T. Kurtovic, Leon Trapman, Anibal Sierra, Laura M. Pérez, Ke Zhang, Pietro Curone, Giovanni P. Rosotti, John Carpenter, Benoît Tabone, Paola Pinilla, Dingshan Deng, Ilaria Pascucci, James Miley, Carolina Agurto-Gangas, Lucas A. Cieza, Rossella Anania, Dary A. Ruiz-Rodriguez, Camilo González-Ruilova, Estephani E. TorresVillanueva, Aleksandra Kuznetsova   +20 more
doaj   +1 more source

Diffusion and Concentration of Solids in the Dead Zone of a Protoplanetary Disk [PDF]

Astrophysical Journal, 2018
The streaming instability is a promising mechanism to drive the formation of planetesimals in protoplanetary disks. To trigger this process, it has been argued that sedimentation of solids onto the mid-plane needs to be efficient, and therefore that a ...
Chao-Chin 欽 Yang 楊朝, M. Mac Low, A. Johansen   +2 more
semanticscholar   +1 more source

The Inner Regions of Protoplanetary Disks [PDF]

Annual Review of Astronomy and Astrophysics, 2010
To understand how planetary systems form in the dusty disks around pre-main-sequence stars, a detailed knowledge of the structure and evolution of these disks is required. Although this is reasonably well understood for the regions of the disk beyond about 1 AU, the structure of these disks inward of 1 AU remains a puzzle. This is partly because it is
Cornelis P. Dullemond, John D. Monnier
openaire   +4 more sources

Shedding Light on the Origin of the Broken Misaligned Circumtriple Disk around GW Ori

The Astrophysical Journal Letters
We revisit the origin of the observed misaligned rings in the circumtriple disk around GW Ori. Previous studies appeared to disagree on whether disk breaking is caused by the differential precession driven in the disk by the triple star system.
Jeremy L. Smallwood, Stephen H. Lubow, Rebecca G. Martin, Rebecca Nealon   +3 more
doaj   +1 more source

Protoplanetary Disk Properties in the Orion Nebula Cluster: Initial Results from Deep, High-resolution ALMA Observations [PDF]

Astrophysical Journal, 2018
We present Atacama Large Millimeter Array 850 μm continuum observations of the Orion Nebula Cluster that provide the highest angular resolution (∼0.″1 ≈ 40 au) and deepest sensitivity (∼0.1 mJy) of the region to date. We mosaicked a field containing ∼225
J. Eisner, H. Arce, N. Ballering, J. Bally, S. Andrews, R. Boyden, J. Francesco, M. Fang, D. Johnstone, J. Kim, R. Mann, B. Matthews, I. Pascucci, L. Ricci, P. Sheehan, J. Williams   +15 more
semanticscholar   +1 more source

Research Progress on Atmospheric Turbulence Perception and Correction Based on Adaptive Optics and Deep Learning

Advanced Photonics Research, Volume 6, Issue 7, July 2025.
This work presents a systematic review of atmospheric turbulence fundamentals, including theoretical formulations and adaptive optics‐based mitigation strategies. This includes an in‐depth examination of the devices, theories, and methodologies associated with traditional correction approaches.
Qinghui Liu, Yihang Di, Mengmeng Zhang, Zhenbo Ren, Jianglei Di, Jianlin Zhao   +5 more
wiley   +1 more source

Gas Evolution in Protoplanetary Disks [PDF]

AIP Conference Proceedings, 2009
This article summarizes a Splinter Session at the Cool Stars XV conference in St. Andrews with 3 review and 4 contributed talks. The speakers have discussed various approaches to understand the structure and evolution of the gas component in protoplanetary disks.
Peter Woitke, Bill Dent, Wing-Fai Thi, Bruce Sibthorpe, Ken Rice, Jonathan Williams, Aurora Sicilia-Aguilar, Joanna Brown, Inga Kamp, Ilaria Pascucci, Richard Alexander, Aki Roberge, Eric Stempels   +12 more
openaire   +6 more sources