Radiative , magnetic and numerical feedbacks on small - scale fragmentation

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 Msolar dense core in solid body rotation, including both radiative transfer and magnetic field. Using typical parameters for low-mass cores, we study thoroughly the effect of radiative transfer and magnetic field on the first core formation and fragmentation. We show that including the two aforementioned physical processes does not correspond to the simple picture of adding them separately. The interplay between the two is extremely strong, via the magnetic braking and the radiation from the accretion shock. DOI: https://doi.org/10.1017/S1743921311000421 Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-48291 Accepted Version Originally published at: Commerçon, B; Hennebelle, P; Audit, E; Chabrier, G; Teyssier, R (2010). Radiative, magnetic and numerical feedbacks on small-scale fragmentation. Proceedings of the International Astronomical Union, 6(S270):227-230. DOI: https://doi.org/10.1017/S1743921311000421 ar X iv :1 01 1. 56 51 v1 [ as tr oph .S R ] 2 5 N ov 2 01 0 Computational Star Formation Proceedings IAU Symposium No. 270, 2010 Alves, Elmegreen, Girart, Trimble, eds. c © 2010 International Astronomical Union DOI: 00.0000/X000000000000000X Radiative, magnetic and numerical feedbacks on small-scale fragmentation Benôıt Commerçon1, Patrick Hennebelle2, Edouard Audit3, Gilles Chabrier4 and Romain Teyssier3,5 Max PLanck Institut für Astronomie Königstuhl 17, D-69117 Heidelberg, Germany email: [email protected] Laboratoire de radioastronomie, École Normale Supérieure et Observatoire de Paris, 24 rue Lhomond, F-75231 Paris Cedex 05, France Laboratoire AIM, CEA/DSM CNRS Université Paris Diderot, IRFU/SAp, F-91191 Gif sur Yvette, France École Normale Supérieure de Lyon, Centre de recherche Astrophysique de Lyon, 46 allée d’Italie, F-69364 Lyon Cedex 07, France Universität Zürich, Institute für Theoretische Physik, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland Abstract. 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 M⊙ dense core in solid body rotation, including both radiative transfer and magnetic field. Using typical parameters for low-mass cores, we study thoroughly the effect of radiative transfer and magnetic field on the first core formation and fragmentation. We show that including the two aforementioned physical processes does not correspond to the simple picture of adding them separately. The interplay between the two is extremely strong, via the magnetic braking and the radiation from the accretion shock. 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 M⊙ dense core in solid body rotation, including both radiative transfer and magnetic field. Using typical parameters for low-mass cores, we study thoroughly the effect of radiative transfer and magnetic field on the first core formation and fragmentation. We show that including the two aforementioned physical processes does not correspond to the simple picture of adding them separately. The interplay between the two is extremely strong, via the magnetic braking and the radiation from the accretion shock.