Zobrazeno 1 - 10
of 408
pro vyhledávání: '"GOODMAN, JEREMY"'
The standard magnetorotational instability (SMRI) is widely believed to be responsible for the observed accretion rates in astronomical disks. It is a linear instability triggered in the differentially rotating ionized disk flow by a magnetic field c
Externí odkaz:
http://arxiv.org/abs/2411.02361
Recent works suggest that, in multiplanetary systems, a close-in exoplanet can sometimes avoid becoming tidally locked to its host star if it is captured into a secular spin-orbit resonance with a companion planet. In such a resonance, the planet rem
Externí odkaz:
http://arxiv.org/abs/2410.05373
Massive stars may form in or be captured into AGN disks. Recent 1D studies employing stellar-evolution codes have demonstrated the potential for rapid growth of such stars through accretion up to a few hundred $M_\odot$. We perform 3D radiation hydro
Externí odkaz:
http://arxiv.org/abs/2408.12017
Autor:
Goodman, Jeremy, Lederman, Harvey
We study social welfare relations (SWRs) on an infinite population. Our main result is a new characterization of a utilitarian SWR as the \emph{largest} SWR (in terms of subset when the weak relation is viewed as a set of pairs) which satisfies Stron
Externí odkaz:
http://arxiv.org/abs/2408.05851
Protoplanetary disks are the sites of vigorous hydrodynamic processes, such as accretion and outflows, and ultimately establish the conditions for the formation of planets. The properties of disk outflows are often inferred through analysis of forbid
Externí odkaz:
http://arxiv.org/abs/2403.10243
The decades-long explorations on the dispersal of protoplanetary disks involve many debates about photoevaporation versus magnetized wind launching mechanisms. This letter argues that the observed winds originating from the inner disk ($R\lesssim 0.3
Externí odkaz:
http://arxiv.org/abs/2401.15419
Autor:
Nemer, Ahmad, Goodman, Jeremy
Emission in forbidden lines of oxygen, neon, and other species are commonly used to trace winds from protoplanetary disks. Using Cloudy, we calculate such emission for parametrized wind models of the magnetothermal type, following Bai et al. (2016).
Externí odkaz:
http://arxiv.org/abs/2311.01802
Magnetized disk winds and wind-driven accretion are an essential and intensively studied dispersion mechanism of protoplanetary disks. However, the stability of these mechanisms has yet to be adequately examined. This paper employs semi-analytic line
Externí odkaz:
http://arxiv.org/abs/2311.01636
Autor:
Shibley, Nicole C., Goodman, Jeremy
Europa's icy surface likely overlies an ocean, but the ice thickness is not known. Here we model the temporal growth of a Europan shell of pure ice subject to varying ice-ocean heat fluxes, ice rheologies, and internal heating rates. Both constant an
Externí odkaz:
http://arxiv.org/abs/2309.16821
The magnetorotational instability (MRI) has been proposed as the method of angular momentum transport that enables accretion in astrophysical discs. However, for weakly-ionized discs, such as protoplanetary discs, it remains unclear whether the combi
Externí odkaz:
http://arxiv.org/abs/2309.03259