Publications (23)
Collapse of massive magnetized dense cores using radiation-magneto-hydrodynamics: early fragmentation inhibition
Benoit Commercon, Patrick Hennebelle, Thomas Henning
We report the results of radiation-magneto-hydrodynamics calculations in the context of high mass star formation, using for the first time a self-consistent model for photon emissi…
What is the role of stellar radiative feedback in setting the stellar mass spectrum?
Patrick Hennebelle, Benoit Commercon, Yueh-Ning Lee +1
In spite of decades of theoretical efforts, the physical origin of the stellar initial mass function (IMF) is still debated. Particularly crucial is the question of what sets the p…
Radiative, magnetic and numerical feedbacks on small-scale fragmentation
Benoit Commercon, Patrick Hennebelle, Edouard Audit +2
Radiative feedback and magnetic field are understood to have a strong impact on the protostellar collapse. We present high resolution numerical calculations of the collapse of a 1…
Simulations of protostellar collapse using multigroup radiation hydrodynamics. I. The first collapse
Neil Vaytet, Edouard Audit, Gilles Chabrier +2
Radiative transfer plays a major role in the process of star formation. Many simulations of gravitational collapse of a cold gas cloud followed by the formation of a protostellar c…
Theories of the massive star formation: a (short) review
Patrick Hennebelle, Benoit Commercon
We briefly review the recent numerical works that have been performed to understand the formation of massive stars. After a brief description of the classical works, we review more…
Thermal Jeans fragmentation within 1000 AU in OMC-1S
Aina Palau, Luis A. Zapata, Carlos G. Roman-Zuniga +6
We present subarcsecond 1.3 mm continuum ALMA observations towards the Orion Molecular Cloud 1 South (OMC-1S) region, down to a spatial resolution of 74 AU, which reveal a total of…
Two-moment cosmic ray transport in RAMSES
Joki Rosdahl, Yohan Dubois, Benoit Commercon +3
Cosmic rays (CRs) are an important source of feedback in a variety of astrophysical contexts. Magneto-hydrodynamical (MHD) simulations treating CRs as a fluid have shown that how t…
Dust Polarization Toward Embedded Protostars in Ophiuchus with ALMA. III. Survey Overview
Sarah I. Sadavoy, Ian W. Stephens, Philip C. Myers +7
We present 0.25 arcsec resolution (35 au) ALMA 1.3 mm dust polarization observations for 37 young stellar objects (YSOs) in the Ophiuchus cloud. These data encompass all the embedd…
Dust Polarization Toward Embedded Protostars in Ophiuchus with ALMA. I. VLA 1623
Sarah I. Sadavoy, Philip C. Myers, Ian W. Stephens +7
We present high resolution (~ 30 au) ALMA Band 6 dust polarization observations of VLA 1623. The VLA 1623 data resolve compact ~ 40 au inner disks around the two protobinary source…
Radiation hydrodynamics with Adaptive Mesh Refinement and application to prestellar core collapse. I Methods
Benoit Commercon, Romain Teyssier, Edouard Audit +2
Radiative transfer has a strong impact on the collapse and the fragmentation of prestellar dense cores. We present the radiation-hydrodynamics solver we designed for the RAMSES cod…
Calibrating the Davis-Chandrasekhar-Fermi method with numerical simulations: uncertainties in estimating the magnetic field strength from statistics of field orientations
Junhao Liu, Qizhou Zhang, Benoit Commercon +3
The Davis-Chandrasekhar-Fermi (DCF) method is widely used to indirectly estimate the magnetic field strength from the plane-of-sky field orientation. In this work, we present a set…
Dust Polarization Toward Embedded Protostars in Ophiuchus with ALMA. II. IRAS 16293-2422
Sarah I. Sadavoy, Philip C. Myers, Ian W. Stephens +6
We present high-resolution (~ 35 au) ALMA Band 6 1.3 mm dust polarization observations of IRAS 16293. These observations spatially resolve the dust polarization across the two prot…
A fast, robust, and simple implicit method for adaptive time-stepping on adaptive mesh-refinement grids
Benoit Commercon, Vincent Debout, Romain Teyssier
Implicit solvers present strong limitations when used on supercomputing facilities and in particular for adaptive mesh-refinement codes. We present a new method for implicit adapti…
Magnetic Fields in Massive Star-forming Regions (MagMaR). V. The Magnetic Field at the Onset of High-mass Star Formation
Patricio Sanhueza, Junhao Liu, Kaho Morii +36
A complete understanding of the initial conditions of high-mass star formation and what processes determine multiplicity require the study of the magnetic field (B-field) in young,…
The magnetic diffusivities in 3D radiative chemo-hydrodynamic simulations of protostellar collapse
Natalia Dzyurkevich, Benoit Commercon, Pierre Lesaffre +1
The grand question of star and planet formation is the distribution of magnetic flux in the protoplanetary disks. To answer it, a detailed self-consistent chemical evolution is nee…
Synthetic observations of first hydrostatic cores in collapsing low-mass dense cores. I. Spectral energy distributions and evolutionary sequence
Benoit Commercon, Ralf Launhardt, Cornelis P. Dullemond +1
The low-mass star formation evolutionary sequence is relatively well-defined both from observations and theoretical considerations. The first hydrostatic core is the first protoste…
Numerical Methods for Simulating Star Formation
Romain Teyssier, Benoit Commercon
We review the numerical techniques for ideal and non-ideal magneto-hydrodynamics (MHD) used in the context of star formation simulations. We outline the specific challenges offered…
Formation and evolution of a protoplanetary disk: combining observations, simulations and cosmochemical constraints
Alessandro Morbidelli, Yves Marrocchi, Adnan Ali Ahmad +12
We present a plausible and coherent view of the evolution of the protosolar disk that is consistent with the cosmochemical constraints and compatible with observations of other pro…
Chemical segregation in the young protostars Barnard 1b-N and S: evidence of pseudo-disk rotation in Barnard 1b-S
Asunción Fuente, Maryvonne Gerin, Jerome Pety +7
The extremely young Class 0 object B1b-S and the first hydrostatic core (FSHC) candidate, B1b-N, provide a unique opportunity to study the chemical changes produced in the elusive…
The Influence of Magnetic Fields on Second-Generation Star Formation in Globular Clusters
Asiyeh Yaghoobi, Fatemeh Tabatabaei, Joakim Rosdahl +3
We investigate the previously unexplored role of magnetic fields in the formation of second-generation (SG) stars in proto-globular clusters (GCs) using 3D radiation-magnetohydrody…
The dominance of turbulence over magnetism in the formation of massive star cluster seeds
Junhao Liu, Patricio Sanhueza, Piyali Saha +32
High-mass stars form in protoclusters, where gravo-magnetic processes shape collapsing clouds and clumps to be elongated preferentially perpendicular to magnetic (B) fields. Yet it…
Magnetically self-regulated formation of early protoplanetary discs
Patrick Hennebelle, Benoit Commercon, Gilles Chabrier +1
The formation of protoplanetary discs during the collapse of molecular dense cores is significantly influenced by angular momentum transport, notably by the magnetic torque. In tur…
Protostellar collapse: A comparison between SPH and AMR calculations
Benoit Commercon, Patrick Hennebelle, Edouard Audit +2
The development of parallel supercomputers allows today the detailed study of the collapse and the fragmentation of prestellar cores with increasingly accurate numerical simulation…