Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Ziampras, Alexandros"'
Autor:
Ziampras, Alexandros, Dullemond, Cornelis P., Birnstiel, Tilman, Benisty, Myriam, Nelson, Richard P.
Numerous protoplanetary disks exhibit shadows in scattered light observations. These shadows are typically cast by misaligned inner disks and are associated with observable structures in the outer disk such as bright arcs and spirals. Investigating t
Externí odkaz:
http://arxiv.org/abs/2410.13932
Autor:
Ziampras, Alexandros, Sudarshan, Prakruti, Dullemond, Cornelis P., Flock, Mario, Berta, Vittoria, Nelson, Richard P., Mignone, Andrea
Protoplanetary disks exhibit a rich variety of substructure in millimeter continuum emission, often attributed to unseen planets. As these planets carve gaps in the gas, dust particles can accumulate in the resulting pressure bumps, forming bright fe
Externí odkaz:
http://arxiv.org/abs/2409.15420
Low-mass planets migrating inwards in laminar protoplanetary disks (PPDs) experience a dynamical corotation torque, which is expected to slow down migration to a stall. However, baroclinic effects can reduce or even reverse this effect, leading to ra
Externí odkaz:
http://arxiv.org/abs/2406.08555
Autor:
Afkanpour, Zahra, Ataiee, Sareh, Ziampras, Alexandros, Penzlin, Anna B. T., Sfair, Rafael, Schäfer, Christoph, Kley, Wilhelm, Schlichting, Hilke
Publikováno v:
A&A 686, A277 (2024)
Resonant planetary migration in protoplanetary discs can lead to an interplay between the resonant interaction of planets and their disc torques called overstability. While theoretical predictions and N-body simulations hinted at its existence, there
Externí odkaz:
http://arxiv.org/abs/2404.05791
Low-mass planets migrate in the type-I regime. In the inviscid limit, the contrast between the vortensity trapped inside the planet's corotating region and the background disk vortensity leads to a dynamical corotation torque, which is thought to slo
Externí odkaz:
http://arxiv.org/abs/2402.00125
In radiatively inefficient, laminar protoplanetary disks, embedded planets can excite a buoyancy response as gas gets deflected vertically near the planet. This results in vertical oscillations that drive a vortensity growth in the planet's corotatin
Externí odkaz:
http://arxiv.org/abs/2308.14896
Publikováno v:
A&A 678, A134 (2023)
Hydrodynamical simulations solve the governing equations on a discrete grid of space and time. This discretization causes numerical diffusion similar to a physical viscous diffusion, whose magnitude is often unknown or poorly constrained. With the cu
Externí odkaz:
http://arxiv.org/abs/2308.03881
ALMA observations of protoplanetary disks in dust continuum emission reveal a variety of annular structures. Attributing the existence of such features to embedded planets is a popular scenario, supported by studies using hydrodynamical models. Recen
Externí odkaz:
http://arxiv.org/abs/2305.14415
Publikováno v:
A&A 670, A135 (2023)
The vertical shear instability (VSI) is a source of hydrodynamic turbulence that can drive vigorous vertical mixing and moderate levels of accretion in protoplanetary disks, and it could be observable in the near future. With high-resolution three-di
Externí odkaz:
http://arxiv.org/abs/2212.10639
Autor:
Sudarshan, Prakruti, Penzlin, Anna B. T., Ziampras, Alexandros, Kley, Wilhelm, Nelson, Richard P.
Publikováno v:
A&A 664, A157 (2022)
Circumbinary disc observations and simulations show large, eccentric inner cavities. Recent work has shown that the shape and size of these cavities depend on the aspect ratio and viscosity of the disc, as well as the binary eccentricity and mass rat
Externí odkaz:
http://arxiv.org/abs/2206.07749