Zobrazeno 1 - 10
of 95
pro vyhledávání: '"Richard H. Durisen"'
Autor:
Thomas Y. Steiman-Cameron, Richard H. Durisen, Aaron C. Boley, Scott Michael, Karna Desai, Caitlin R. McConnell
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 2, p 139 (2023)
During early phases of a protoplanetary disk's life, gravitational instabilities (GIs) can produce significant mass transport, can dramatically alter disk structure, can mix and shock-process gas and solids, and may be instrumental in planet formatio
Externí odkaz:
https://doaj.org/article/bd37d345932447a398609df801c17d98
Autor:
Paul R. Estrada, Richard H. Durisen
The Cassini spacecraft provided key measurements during its more than twelve year mission that constrain the absolute age of Saturn's rings. These include the extrinsic micrometeoroid flux at Saturn, the volume fraction of non-icy pollutants in the r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b59445b73a99fc46b997dd1163aee608
http://arxiv.org/abs/2305.13609
http://arxiv.org/abs/2305.13609
Autor:
Richard H. Durisen, Paul R. Estrada
The Cassini mission provided key measurements needed to determine the absolute age of Saturn's rings, including the extrinsic micrometeoroid flux at Saturn, the volume fraction of non-icy pollutants in the rings, and the total ring mass. These three
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::184f84dd2923edcfe0ecced07236766f
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 483:2347-2361
We present a 3D hydrodynamics study of gravitational instabilities (GIs) in a 0.14 M$_{\odot}$ circumbinary protoplanetary disc orbiting a 1 M$_{\odot}$ star and a 0.02 M$_{\odot}$ brown dwarf companion. We examine the thermodynamical state of the di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e22f75eb66408987a15f3ef98ea7bf6
https://doi.org/10.1093/mnras/sty3240
https://doi.org/10.1093/mnras/sty3240
Publikováno v:
Icarus. 252:415-439
We introduce improved numerical techniques for simulating the structural and compositional evolution of planetary rings due to micrometeoroid bombardment and subsequent ballistic transport of impact ejecta. Our current, robust code is capable of mode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9a156908a3cbe752036b3dd2ce115fc
https://doi.org/10.1016/j.icarus.2015.02.005
https://doi.org/10.1016/j.icarus.2015.02.005
Autor:
M. G. Evans, Sjd Purser, Paola Caselli, L Szucs, A. C. Boley, John D. Ilee, T. W. Hartquist, J. M. C. Rawlings, Richard H. Durisen
Gravitational instabilities (GIs) are most likely a fundamental process during the early stages of protoplanetary disc formation. Recently, there have been detections of spiral features in young, embedded objects that appear consistent with GI-driven
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ade022215c69b20e2d04296482e2356
https://www.repository.cam.ac.uk/handle/1810/269620
https://www.repository.cam.ac.uk/handle/1810/269620
Autor:
A. C. Boley, Paola Caselli, John D. Ilee, J. M. C. Rawlings, Richard H. Durisen, Thomas W. Hartquist
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 417:2950-2961
Until now, axisymmetric, alpha-disc models have been adopted for calculations of the chemical composition of protoplanetary discs. While this approach is reasonable for many discs, it is not appropriate when self-gravity is important. In this case, s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7193767d5dfac071cc31cb2a8b1b0d8a
https://doi.org/10.1111/j.1365-2966.2011.19455.x
https://doi.org/10.1111/j.1365-2966.2011.19455.x
Publikováno v:
Icarus. 207:509-516
We explore the initial conditions for fragments in the extended regions ($r\gtrsim 50$ AU) of gravitationally unstable disks. We combine analytic estimates for the fragmentation of spiral arms with 3D SPH simulations to show that initial fragment mas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6db427e0e8d7c61a492e0b77dedaa0be
https://doi.org/10.1016/j.icarus.2010.01.015
https://doi.org/10.1016/j.icarus.2010.01.015
Autor:
Scott Michael, Richard H. Durisen
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 406:279-289
We test the effect of assumptions about stellar motion on the behaviour of gravitational instabilities (GIs) in protoplanetary discs around solar-type stars by performing two simulations that are identical in all respects except the treatment of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3d6cca097ddc27a7216612e26831765
https://doi.org/10.1111/j.1365-2966.2010.16694.x
https://doi.org/10.1111/j.1365-2966.2010.16694.x