Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Andrew N. Youdin"'
Publikováno v:
The Astrophysical Journal Letters, Vol 970, Iss 1, p L19 (2024)
Disk vortices, seen in numerical simulations of protoplanetary disks and found observationally in Atacama Large Millimeter/submillimeter Array and Very Large Array images of these objects, are promising sites for planet formation given their pebble t
Externí odkaz:
https://doaj.org/article/a3cf53fcc7f84ac3b845353536a905cb
Autor:
Leonardo Krapp, Kaitlin M. Kratter, Andrew N. Youdin, Pablo Benítez-Llambay, Frédéric Masset, Philip J. Armitage
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 153 (2024)
The formation of circumplanetary disks is central to our understanding of giant planet formation, influencing their growth rate during the post-runaway phase and observability while embedded in protoplanetary disks. We use three-dimensional global mu
Externí odkaz:
https://doaj.org/article/da3f5eceb4174568893c726f8f773f9f
Autor:
David G. Rea, Jacob B. Simon, Daniel Carrera, Geoffroy Lesur, Wladimir Lyra, Debanjan Sengupta, Chao-Chin Yang, Andrew N. Youdin
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 128 (2024)
Given the important role turbulence plays in the settling and growth of dust grains in protoplanetary disks, it is crucial that we determine whether these disks are turbulent and to what extent. Protoplanetary disks are weakly ionized near the midpla
Externí odkaz:
https://doaj.org/article/7752717a48b24e05afa765f5be35fccd
Autor:
Jeonghoon Lim, Jacob B. Simon, Rixin Li, Philip J. Armitage, Daniel Carrera, Wladimir Lyra, David G. Rea, Chao-Chin Yang, Andrew N. Youdin
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 2, p 130 (2024)
The streaming instability (SI) is a leading candidate for planetesimal formation, which can concentrate solids through two-way aerodynamic interactions with the gas. The resulting concentrations can become sufficiently dense to collapse under particl
Externí odkaz:
https://doaj.org/article/aff280b5df8c49feba247d23da9f0031
Autor:
Manuel H. Cañas, Wladimir Lyra, Daniel Carrera, Leonardo Krapp, Debanjan Sengupta, Jacob B. Simon, Orkan M. Umurhan, Chao-Chin Yang, Andrew N. Youdin
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 2, p 55 (2024)
Kuiper Belt objects (KBOs) show an unexpected trend, whereby large bodies have increasingly higher densities, up to five times greater than their smaller counterparts. Current explanations for this trend assume formation at constant composition, with
Externí odkaz:
https://doaj.org/article/187b0e4371fc4cd582deec6428b351b3
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 173 (2024)
Recent studies have shown that the large-scale gas dynamics of protoplanetary disks (PPDs) are controlled by nonideal magnetohydrodynamics (MHD), but how this influences dust dynamics is not fully understood. To this end, we investigate the stability
Externí odkaz:
https://doaj.org/article/fca5f9ce91b94e44ad13dbb0148c8ae7
Publikováno v:
The Astrophysical Journal Letters, Vol 946, Iss 1, p L1 (2023)
High-resolution submillimeter observations of protoplanetary disks with ALMA have revealed that dust rings are common in large, bright disks. The leading explanation for these structures is dust trapping in a local gas pressure maximum, caused by an
Externí odkaz:
https://doaj.org/article/08cc8973632b482da3bdd831ec89e75d
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 507:6215-6224
The dissociation and ionization of hydrogen, during the formation of giant planets via core accretion, reduce the effective adiabatic index γ of the gas and could trigger dynamical instability. We generalize the analysis of Chandrasekhar, who determ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97c9c96465641ad0d25b056f29e0fd94
https://doi.org/10.1093/mnras/stab2576
https://doi.org/10.1093/mnras/stab2576
Autor:
Philip J. Armitage, Andrew N. Youdin, Yan-Fei Jiang, Hans Baehr, Zhaohuan Zhu, Rebecca G. Martin
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 508:453-474
The core accretion model of giant planet formation has been challenged by the discovery of recycling flows between the planetary envelope and the disc that can slow or stall envelope accretion. We carry out 3D radiation hydrodynamic simulations with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd2570ef5e33c07d987fe202e7ea1f49
https://doi.org/10.1093/mnras/stab2517
https://doi.org/10.1093/mnras/stab2517
Publikováno v:
Nature Astronomy. 3:808-812
A critical step toward the emergence of planets in a protoplanetary disk is the accretion of planetesimals, bodies 1–1,000 km in size, from smaller disk constituents. This process is poorly understood, partly because we lack good observational cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3683566908e5f80f5ad6b27c4571f538
https://doi.org/10.1038/s41550-019-0806-z
https://doi.org/10.1038/s41550-019-0806-z