Search Results - "NORDLUND, Ake"

The Star Formation Rate of Supersonic Magnetohydrodynamic Turbulence by Padoan, Paolo, Nordlund, Åke

“…This work presents a new physical model of the star formation rate (SFR), which is verified with an unprecedented set of large numerical simulations of driven,…”
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The Origin of Massive Stars: The Inertial-inflow Model by Padoan, Paolo, Pan, Liubin, Juvela, Mika, Haugbølle, Troels, Nordlund, ke

“…We address the problem of the origin of massive stars, namely the origin, path, and timescale of the mass flows that create them. Based on extensive numerical…”
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Zoom-in Simulations of Protoplanetary Disks Starting from GMC Scales by Kuffmeier, Michael, Haugbølle, Troels, Nordlund, ke

“…We investigate the formation of protoplanetary disks around nine solar-mass stars formed in the context of a (40 pc)3 Giant Molecular Cloud model, using ramses…”
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SUPERNOVA DRIVING. I. THE ORIGIN OF MOLECULAR CLOUD TURBULENCE by Padoan, Paolo, Pan, Liubin, Haugbølle, Troels, Nordlund, ke

“…ABSTRACT Turbulence is ubiquitous in molecular clouds (MCs), but its origin is still unclear because MCs are usually assumed to live longer than the turbulence…”
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The Stellar IMF from Isothermal MHD Turbulence by Haugbølle, Troels, Padoan, Paolo, Nordlund, ke

“…We address the turbulent fragmentation scenario for the origin of the stellar initial mass function (IMF), using a large set of numerical simulations of…”
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INFALL-DRIVEN PROTOSTELLAR ACCRETION AND THE SOLUTION TO THE LUMINOSITY PROBLEM by Padoan, Paolo, HAUGBOLLE, TROELS, Nordlund, Ake

“…We investigate the role of mass infall in the formation and evolution of protostars. To avoid ad hoc initial and boundary conditions, we consider the infall…”
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Supernova Driving. IV. The Star-formation Rate of Molecular Clouds by Padoan, Paolo, Haugbølle, Troels, Nordlund, Åke, Frimann, Søren

“…We compute the star-formation rate (SFR) in molecular clouds (MCs) that originate ab initio in a new, higher-resolution simulation of supernova-driven…”
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The Probability Distribution of Density Fluctuations in Supersonic Turbulence by Pan, Liubin, Padoan, Paolo, Nordlund, ke

“…A theoretical formulation is developed for the probability distribution function (pdf) of gas density in supersonic turbulence at steady state, connecting it…”
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Pebble dynamics and accretion on to rocky planets – I. Adiabatic and convective models by Popovas, Andrius, Nordlund, Åke, Ramsey, Jon P, Ormel, Chris W

“…We present nested-grid, high-resolution hydrodynamic simulations of gas and particle dynamics in the vicinity of Mars- to Earth-mass planetary embryos. The…”
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A GRID OF THREE-DIMENSIONAL STELLAR ATMOSPHERE MODELS OF SOLAR METALLICITY. I. GENERAL PROPERTIES, GRANULATION, AND ATMOSPHERIC EXPANSION by Trampedach, Regner, Asplund, Martin, Collet, Remo, Nordlund, Ake, Stein, Robert F

“…Present grids of stellar atmosphere models are the workhorses in interpreting stellar observations and determining their fundamental parameters. These models…”
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Transport, Destruction, and Growth of Pebbles in the Gas Envelope of a Protoplanet by Johansen, Anders, Nordlund, ke

“…We analyze the size evolution of pebbles accreted into the gaseous envelope of a protoplanet growing in a protoplanetary disk, taking into account collisions…”
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The Absolute Chronology and Thermal Processing of Solids in the Solar Protoplanetary Disk by Connelly, James N., Bizzarro, Martin, Krot, Alexander N., Nordlund, Åke, Wielandt, Daniel, Ivanova, Marina A.

“…Transient heating events that formed calcium-aluminum-rich inclusions (CAIs) and chondrules are fundamental processes in the evolution of the solar…”
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A pebble accretion model for the formation of the terrestrial planets in the Solar System by Johansen, Anders, Ronnet, Thomas, Bizzarro, Martin, Schiller, Martin, Lambrechts, Michiel, Nordlund, Åke, Lammer, Helmut

“…Pebbles of millimeter sizes are abundant in protoplanetary discs around young stars. Chondrules inside primitive meteorites-formed by melting of dust aggregate…”
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Pebble dynamics and accretion on to rocky planets – II. Radiative models by Popovas, Andrius, Nordlund, Åke, Ramsey, Jon P

“…We investigate the effects of radiative energy transfer on a series of nested-grid, high-resolution hydrodynamic simulations of gas and particle dynamics in…”
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The Stagger Code for Accurate and Efficient, Radiation-coupled Magnetohydrodynamic Simulations by Stein, Robert F., Nordlund, Åke, Collet, Remo, Trampedach, Regner

“…We describe the Stagger code for simulations of magnetohydrodynamic (MHD) systems. This is a modular code with a variety of physics modules that will let the…”
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SUPERNOVA DRIVING. II. COMPRESSIVE RATIO IN MOLECULAR-CLOUD TURBULENCE by Pan, Liubin, Padoan, Paolo, Haugbølle, Troels, Nordlund, ke

“…ABSTRACT The compressibility of molecular cloud (MC) turbulence plays a crucial role in star formation models, because it controls the amplitude and…”
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dispatch: a numerical simulation framework for the exa-scale era – I. Fundamentals by Nordlund, Åke, Ramsey, Jon P, Popovas, Andrius, Küffmeier, Michael

“…Abstract We introduce a high-performance simulation framework that permits the semi-independent, task-based solution of sets of partial differential equations,…”
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The Stellar Initial Mass Function from Turbulent Fragmentation by Padoan, Paolo, Nordlund, Åke

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Improvements to stellar structure models, based on a grid of 3D convection simulations – II. Calibrating the mixing-length formulation by Trampedach, Regner, Stein, Robert F., Christensen-Dalsgaard, Jørgen, Nordlund, Åke, Asplund, Martin

“…We perform a calibration of the mixing length of convection in stellar structure models against realistic 3D radiation-coupled hydrodynamics simulations of…”
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Isotopic evidence for primordial molecular cloud material in metal-rich carbonaceous chondrites by Van Kooten, Elishevah M. M. E., Wielandt, Daniel, Schiller, Martin, Nagashima, Kazuhide, Thomen, Aurélien, Larsen, Kirsten K., Olsen, Mia B., Nordlund, Åke, Krot, Alexander N., Bizzarro, Martin

“…The short-lived 26Al radionuclide is thought to have been admixed into the initially 26Al-poor protosolar molecular cloud before or contemporaneously with its…”
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