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pro vyhledávání: '"Lesur, G."'
Context: Protoplanetary discs are known to form around nascent stars from their parent molecular cloud as a result of angular momentum conservation. As they progressively evolve and dissipate, they also form planets. While a lot of modeling efforts h
Externí odkaz:
http://arxiv.org/abs/2403.16753
Autor:
Bourdarot, G., Berger, J-P., Lesur, G., Perraut, K., Malbet, F., Millan-Gabet, R., Bouquin, J-B. Le, Garcia-Lopez, R., Monnier, J. D., Labdon, A., Kraus, S., Labadie, L., Aarnio, A.
Publikováno v:
A&A 676, A124 (2023)
Context: FUors outbursts are a crucial stage of accretion in young stars. However a complete mechanism at the origin of the outburst still remains missing. Aims: We aim at constraining the instability mechanism in FU Orionis star itself, by directly
Externí odkaz:
http://arxiv.org/abs/2304.13414
Publikováno v:
A&A 677, A10 (2023)
In dwarf nov{\ae} and low-mass X-ray binaries, the tidal potential excites spiral waves in the accretion disc. Spiral wave driven accretion may be important in quiescent discs, where the angular momentum transport mechanism has yet to be identified.
Externí odkaz:
http://arxiv.org/abs/2304.13773
Autor:
Lesur, G. R. J., Baghdadi, S., Wafflard-Fernandez, G., Mauxion, J., Robert, C. M. T., Bossche, M. Van den
Publikováno v:
A&A 677, A9 (2023)
Exascale super-computers now becoming available rely on hybrid energy-efficient architectures that involve an accelerator such as Graphics Processing Units (GPU). Leveraging the computational power of these machines often means a significant rewrite
Externí odkaz:
http://arxiv.org/abs/2304.13746
Autor:
Lesur, G., Ercolano, B., Flock, M., Lin, M. -K., Yang, C. -C., Barranco, J. A., Benitez-Llambay, P., Goodman, J., Johansen, A., Klahr, H., Laibe, G., Lyra, W., Marcus, P., Nelson, R. P., Squire, J., Simon, J. B., Turner, N., Umurhan, O. M., Youdin, A. N.
The building of planetary systems is controlled by the gas and dust dynamics of protoplanetary disks. While the gas is simultaneously accreted onto the central star and dissipated away by winds, dust grains aggregate and collapse to form planetesimal
Externí odkaz:
http://arxiv.org/abs/2203.09821
In their early stages, protoplanetary discs are sufficiently massive to undergo gravitational instability (GI). This instability is thought to be involved in mass accretion, planet formation via gas fragmentation, the generation of spiral density wav
Externí odkaz:
http://arxiv.org/abs/2106.03607
Publikováno v:
A&A 647, A192 (2021)
Astrophysical disks are likely embedded in an ambient vertical magnetic field. This ambient field is known to drive magneto-rotational turbulence in the disk bulk but is also responsible for the launching of magnetized outflows at the origin of astro
Externí odkaz:
http://arxiv.org/abs/2011.14782
Autor:
Villenave, M., Menard, F., Dent, W. R. F., Duchene, G., Stapelfeldt, K. R., Benisty, M., Boehler, Y., van der Plas, G., Pinte, C., Telkamp, Z., Wolff, S., Flores, C., Lesur, G., Louvet, F., Riols, A., Dougados, C., Williams, H., Padgett, D.
Publikováno v:
A&A 642, A164 (2020)
We analyze a sample of 12 HST-selected edge-on protoplanetary disks for which the vertical extent of the emission layers can be constrained directly. We present ALMA high angular resolution continuum images (0.1arcsec) of these disks at two wavelengt
Externí odkaz:
http://arxiv.org/abs/2008.06518
Autor:
Lesur, G.
Protoplanetary discs are made of gas and dust orbiting a young star. They are also the birth place of planetary systems, which motivates a large amount of observational and theoretical research. In these lecture notes, I present a review of the magne
Externí odkaz:
http://arxiv.org/abs/2007.15967
Large-scale vertical magnetic fields are believed to play a key role in the evolution of protoplanetary discs. Associated with non-ideal effects, such as ambipolar diffusion, they are known to launch a wind that could drive accretion in the outer par
Externí odkaz:
http://arxiv.org/abs/2006.01194