Results 11 to 20 of about 425,590 (288)
On the Diversity of Asymmetries in Gapped Protoplanetary Disks [PDF]
Astronomical Journal, 2020 Protoplanetary disks with large inner dust cavities are thought to host massive planetary or substellar companions. These disks show asymmetries and rings in the millimeter continuum caused by dust trapping in pressure bumps and potentially vortices or ...
N. van der Marel +9 more
semanticscholar +1 more source
Tracing the Formation History of Giant Planets in Protoplanetary Disks with Carbon, Oxygen, Nitrogen, and Sulfur [PDF]
Astrophysical Journal, 2020 The composition of giant planets is imprinted by their migration history and the compositional structure of their hosting disks. Studies in recent literature have investigated how the abundances of C and O can constrain the formation pathways of giant ...
D. Turrini +9 more
semanticscholar +1 more source
How Efficient Is the Streaming Instability in Viscous Protoplanetary Disks? [PDF]
Astrophysical Journal, 2020 The streaming instability is a popular candidate for planetesimal formation by concentrating dust particles to trigger gravitational collapse. However, its robustness against the physical conditions expected in protoplanetary disks is unclear.
Kan Chen, Min-Kai Lin
semanticscholar +1 more source
An ALMA Survey of H2CO in Protoplanetary Disks [PDF]
Astrophysical Journal, 2020 H2CO is one of the most abundant organic molecules in protoplanetary disks and can serve as a precursor to more complex organic chemistry. We present an Atacama Large Millimeter/submillimeter Array survey of H2CO toward 15 disks covering a range of ...
J. Pegues +15 more
semanticscholar +1 more source
Gas and Dust Dynamics in Starlight-heated Protoplanetary Disks [PDF]
Astrophysical Journal, 2020 Theoretical models of the ionization state in protoplanetary disks suggest the existence of large areas with low ionization and weak coupling between the gas and magnetic fields. In this regime hydrodynamical instabilities may become important.
M. Flock +5 more
semanticscholar +1 more source
Finding Substructures in Protostellar Disks in Ophiuchus
The Astronomical Journal, 2023 High-resolution, millimeter observations of disks at the protoplanetary stage reveal substructures such as gaps, rings, arcs, spirals, and cavities. While many protoplanetary disks host such substructures, only a few at the younger protostellar stage ...
Arnaud Michel +7 more
doaj +1 more source
Global Hydromagnetic Simulations of Protoplanetary Disks with Stellar Irradiation and Simplified Thermochemistry [PDF]
Astrophysical Journal, 2020 Outflows driven by large-scale magnetic fields likely play an important role in the evolution and dispersal of protoplanetary disks and in setting the conditions for planet formation.
O. Gressel +5 more
semanticscholar +1 more source
Chemistry in Protoplanetary Disks [PDF]
Chemical Reviews, 2013 This comprehensive review summarizes our current understanding of the evolution of gas, solids and molecular ices in protoplanetary disks. Key findings related to disk physics and chemistry, both observationally and theoretically, are highlighted.
Dmitry Semenov, Thomas Henning
openaire +4 more sources
An Unbiased ALMA Spectral Survey of the LkCa 15 and MWC 480 Protoplanetary Disks [PDF]
Astrophysical Journal, 2020 The volatile contents of protoplanetary disks both set the potential for planetary chemistry and provide valuable probes of defining disk system characteristics such as stellar mass, gas mass, ionization, and temperature structure. Current disk molecular
R. Loomis +15 more
semanticscholar +1 more source
An Evolutionary Study of Volatile Chemistry in Protoplanetary Disks [PDF]
Astrophysical Journal, 2020 The volatile composition of a planet is determined by the inventory of gas and ice in the parent disk. The volatile chemistry in the disk is expected to evolve over time, though this evolution is poorly constrained observationally.
J. Bergner +13 more
semanticscholar +1 more source