Results 51 to 60 of about 54,720 (190)
Effect of Time-varying X-Ray Emission from Stellar Flares on the Ionization of Protoplanetary Disks
The Astrophysical JournalX-rays have significant impacts on cold, weakly ionized protoplanetary disks by increasing the ionization rate and driving chemical reactions. Stellar flares are explosions that emit intense X-rays and are the unique source of hard X-rays with an energy ...
Haruka Washinoue +2 more
doaj +1 more source
Herschel evidence for disk flattening or gas depletion in transitional disks [PDF]
, 2014 Transitional disks are protoplanetary disks characterized by reduced near- and mid-infrared emission with respect to full disks. This characteristic spectral energy distribution indicates the presence of an optically thin inner cavity within the dust disk believed to mark the disappearance of the primordial massive disk.
arxiv +1 more source
Exploring the Complex Ionization Environment of the Turbulent DM Tau Disk
The Astrophysical JournalIonization drives important chemical and dynamical processes within protoplanetary disks, including the formation of organics and water in the cold midplane and the transportation of material via accretion and magnetohydrodynamic flows.
Deryl E. Long +11 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 Planets form in dusty, gas-rich disks around young stars, while at the same time, the planet formation process alters the physical and chemical structure of the disk itself. Embedded planets will locally heat the disk and sublimate volatile-rich ices, or
Charles J. Law +2 more
doaj +1 more source
Differences in elemental abundances between CI chondrites and the solar photosphere
Meteoritics &Planetary Science, Volume 59, Issue 12, Page 3193-3214, December 2024.Abstract CI chondrites have been a proxy for the solar system since the mid‐20th century. The photospheric and CI chondrite abundances (P and CI, respectively) show a strong correlation. CI as a proxy is also justified by the (i) smoothness of their abundances plotted as a function of odd mass number and (ii) agreement within the error of P as ...
A. J. G. Jurewicz +3 more
wiley +1 more source
Evolution of PAHs in protoplanetary disks [PDF]
, 2011 Depending on whom you ask, PAHs are either the smallest dust particles or the largest gas-phase molecules in space. Whether referred to as gas or dust, these PAHs can contain up to 20% of the total cosmic carbon abundance and as such also play an important role in the carbon chemistry of protoplanetary disks.
arxiv +1 more source
Meteoritics &Planetary Science, Volume 59, Issue 12, Page 3282-3304, December 2024.Abstract Understanding the material transport and mixing processes in the Solar protoplanetary disk provides important constraints on the origin of chemical and isotopic diversities of our planets. The limited extent of radial transport and mixing between the inner and outer Solar System has been suggested based on a fundamental isotopic dichotomy ...
Kohei Fukuda +7 more
wiley +1 more source
Chemistry of Complex Organic Molecules in the V883 Ori Disk Revealed by ALMA Band 3 Observations
The Astronomical JournalComplex organic molecules (COMs) in protoplanetary disks are key to understanding the origin of volatiles in comets in our solar system, yet the chemistry of COMs in protoplanetary disks remains poorly understood.
Yoshihide Yamato +5 more
doaj +1 more source
Protoplanetary Disk Heating and Evolution Driven by the Spiral Density Waves [PDF]
, 2016 High-resolution imaging of some protoplanetary disks in scattered light reveals presence of the global spiral arms of significant amplitude, likely excited by massive planets or stellar companions. Assuming that these arms are density waves, evolving into spiral shocks, we assess their effect on the thermodynamics, accretion, and global evolution of ...
arxiv +1 more source
The Meteoritical Society: Business from 2023 to 2024
Meteoritics &Planetary Science, Volume 60, Issue 3, Page 680-696, March 2025.
Nancy L. Chabot +2 more
wiley +1 more source