Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Pfeil, Thomas"'
Publikováno v:
A&A, 691, A45 (2024)
Context. Dust coagulation and fragmentation impact the structure and evolution of protoplanetary disks and set the initial conditions for planet formation. Dust grains dominate the opacities, they determine the cooling times of the gas, they influenc
Externí odkaz:
http://arxiv.org/abs/2409.03816
Publikováno v:
A&A 687, L5 (2024)
Context. Gas in protoplanetary disks mostly cools via thermal accommodation with dust particles. Thermal relaxation is thus highly sensitive to the local dust size distributions and the spatial distribution of the grains. So far, the interplay betwee
Externí odkaz:
http://arxiv.org/abs/2406.10335
Publikováno v:
ApJ 959 121 (2023)
Protoplanetary disks exhibit a vertical gradient in angular momentum, rendering them susceptible to the Vertical Shear Instability (VSI). The most important condition for the onset of this mechanism is a short timescale of thermal relaxation ($\lesss
Externí odkaz:
http://arxiv.org/abs/2310.07332
Autor:
Pfeil, Thomas, Cranmer, Miles, Ho, Shirley, Armitage, Philip J., Birnstiel, Tilman, Klahr, Hubert
Planet formation is a multi-scale process in which the coagulation of $\mathrm{\mu m}$-sized dust grains in protoplanetary disks is strongly influenced by the hydrodynamic processes on scales of astronomical units ($\approx 1.5\times 10^8 \,\mathrm{k
Externí odkaz:
http://arxiv.org/abs/2211.04160
Publikováno v:
Pattern Recognition. DAGM GCPR 2021. Lecture Notes in Computer Science, vol 13024. Springer, Cham., pp. 297-312
Event-based vision sensors encode local pixel-wise brightness changes in streams of events rather than image frames and yield sparse, energy-efficient encodings of scenes, in addition to low latency, high dynamic range, and lack of motion blur. Recen
Externí odkaz:
http://arxiv.org/abs/2112.03423
Publikováno v:
International Conference on Learning Representations (ICLR) 2022
Pruning neural networks reduces inference time and memory costs. On standard hardware, these benefits will be especially prominent if coarse-grained structures, like feature maps, are pruned. We devise two novel saliency-based methods for second-orde
Externí odkaz:
http://arxiv.org/abs/2110.11395
A certain appeal to the alpha model for turbulence and related viscosity in accretion disks was that one scales the Reynolds stresses simply on the thermal pressure, assuming that turbulence driven by a certain mechanism will attain a characteristic
Externí odkaz:
http://arxiv.org/abs/2109.01649
Autor:
Pfeil, Thomas
Deep neural networks have usually to be compressed and accelerated for their usage in low-power, e.g. mobile, devices. Recently, massively-parallel hardware accelerators were developed that offer high throughput and low latency at low power by utiliz
Externí odkaz:
http://arxiv.org/abs/2101.08685
Autor:
Pfeil, Thomas, Klahr, Hubert
Publikováno v:
The Astrophysical Journal, 915, 130 (2021)
Turbulence has a profound impact on the evolution of gas and dust in protoplanetary disks (PPDs), from driving the collisions and the diffusion of dust grains, to the concentration of pebbles in giant vortices, thus, facilitating planetesimal formati
Externí odkaz:
http://arxiv.org/abs/2008.11195
Autor:
Pfeil, Thomas, Klahr, Hubert
Publikováno v:
The Astrophysical Journal, 871, 150 (2019)
Hydrodynamical instabilities in disks around young stars depend on the thermodynamic stratification of the disk and on the local rate of thermal relaxation. Here, we map the spatial extent of unstable regions for the Vertical Shear Instability (VSI),
Externí odkaz:
http://arxiv.org/abs/1808.10344