Results 51 to 60 of about 5,108 (182)

Zonal Flow and Self-regulating Mechanism in a Hydrodynamic Disk

The Astrophysical Journal
This study addresses key aspects of momentum transport in hydrodynamic disks, which is critical for understanding zonal flow generation and turbulence in compressible hydrodynamic disks.
Chang-Chun Chen, Hui Li, P. H. Diamond, Shengtai Li   +3 more
doaj   +1 more source

Aqueous alteration in C2‐ung Bells through the analysis of carbonates – Does a CR origin ring true?

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 927-941, May 2026.
Abstract Bells is an ungrouped carbonaceous chondrite that has in recent years been proposed as a CR‐an. This link to CR chondrites has previously been identified through the analysis of anhydrous silicates, for example, oxygen isotopic compositions of olivine (Marrocchi et al., 2023).
L. J. Riches, M. D. Suttle, I. A. Franchi, X. Zhao, M. M. Grady   +4 more
wiley   +1 more source

The photophoretic sweeping of dust in transient protoplanetary disks [PDF]

, 2006
Context: Protoplanetary disks start their lives with a dust free inner region where the temperatures are higher than the sublimation temperature of solids. As the star illuminates the innermost particles, which are immersed in gas at the sublimation edge,
Krauss, O., Petit, Jean-Marc, Alibert, Yann, Wurm, G., Y. Alibert, Alibert, Y., Mousis, Olivier, Mousis, O., Horner, Johannes, Petit, Jean-Marc,, Horner, J., J.-M. Petit, Krauss, Oliver, O. Krauss, G. Wurm, Petit, J.-M., O. Mousis, J. Horner, Wurm, Gerhard, Petit, Jean-Marc, C., Horner, Jonathan   +20 more
core   +1 more source

Protoplanetary Disk Polarization at Multiple Wavelengths: Are Dust Populations Diverse?

The Astrophysical Journal
Millimeter and submillimeter observations of continuum linear dust polarization provide insight into dust grain growth in protoplanetary disks, which are the progenitors of planetary systems.
Rachel E. Harrison, Zhe-Yu Daniel Lin, Leslie W. Looney, Zhi-Yun Li, Haifeng Yang, Ian W. Stephens, Manuel Fernández-López   +6 more
doaj   +1 more source

Centimeter-sized Grains in the Compact Dust Ring around Very-low-mass Star CIDA 1

The Astronomical Journal, 2023
We examined the grain size in the dust ring encircling the 0.19 M _☉ T Tauri star CIDA 1 using the Karl G. Jansky Very Large Array at multiple centimeter wavelengths, with a spatial resolution of 0.″2–0.″9. We detected distinct partial-ring structures at
Jun Hashimoto, Hauyu Baobab Liu, Ruobing Dong, Beibei Liu, Takayuki Muto, Yuka Terada   +5 more
doaj   +1 more source

Composite Single‐Reference and Explicitly Correlated Multireference Calculations on the Mechanism of Pyrrole Pyrolysis

Journal of Physical Organic Chemistry, Volume 39, Issue 4, April 2026.
New calculations have been applied to the pyrolysis of pyrrole under shock‐tube conditions and to the radical‐radical reaction between allyl and •CN at low temperature and pressure, using the same mechanistic scheme for both. ABSTRACT The pyrolysis of pyrrole has previously been studied in shock‐tube experiments and in jet‐stirred reactors. The results
Barry K. Carpenter
wiley   +1 more source

Microphysics of Protoplanetary Disks and Exoplanet Atmospheres [PDF]

, 2021
An understanding of planetary histories and characteristics requires an empirical connection between planet formation and evolved planets---a long-sought goal of astrophysics and planetary science.
Powell, Diana Kathryn Law-Smith
core  

Puffed-up Inner Rings and Razor-thin Outer Rings in Structured Protoplanetary Disks

The Astrophysical Journal
The vertical distribution of pebbles in protoplanetary disks is a fundamental property influencing planet formation, from dust aggregation to the assembly of planetary cores.
Haochang Jiang, Feng Long, Enrique Macías, Myriam Benisty, Kiyoaki Doi, Cornelis P. Dullemond, Ryan A. Loomis, Ilaria Pascucci, Sebastián Pérez, Shangjia Zhang, Zhaohuan Zhu   +10 more
doaj   +1 more source

Formation of the First Planetesimals via the Streaming Instability in Globally Turbulent Protoplanetary Disks?

The Astrophysical Journal, 2023
Using self-consistent models of turbulent particle growth in an evolving protoplanetary nebula of solar composition, we find that recently proposed local metallicity and Stokes number criteria necessary for the streaming instability to generate ...
Paul R. Estrada, Orkan M. Umurhan
doaj   +1 more source

Deciphering the “Missing Xenon Paradox” in Celestial Bodies: A Multifaceted Perspective Toward Demystifying This Enigma

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Xenon (Xe) is a heavy noble gas with intriguing chemical properties, such as having several stable isotopes and the ability to form compounds under extreme conditions. Despite the predictions based on cosmochemical models that suggest xenon should be relatively abundant in planetary reservoirs, empirical data indicate a significant depletion ...
Avinash Kumar Both, Avradip Ghosh, Chin Li Cheung   +2 more
wiley   +1 more source