3D gray radiative properties of accretion shocks in young stellar objects

L. Ibgui, S. Orlando, C. Stehlé, J. P. Chièze, Ivan - Hubeny, T. Lanz, L. De Sá, T. Matsakos, M. González, R. Bonito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We address the problem of the contribution of radiation to the structure and dynamics of accretion shocks on Young Stellar Objects. Solving the 3D RTE (radiative transfer equation) under our "gray LTE approach", i.e., using appropriate mean opacities computed in local thermodynamic equilibrium, we post-process the 3D MHD (magnetohydrodynamic) structure of an accretion stream impacting the stellar chromosphere. We find a radiation flux of ten orders of magnitude larger than the accreting energy rate, which is due to a large overestimation of the radiative cooling. A gray LTE radiative transfer approximation is therefore not consistent with the given MHD structure of the shock. Further investigations are required to clarify the role of radiation, by relaxing both the gray and LTE approximations in RHD (radiation hydrodynamics) simulations. Post-processing the obtained structures through the resolution of the non-LTE monochromatic RTE will provide reference radiation quantities against which RHD approximate solutions will be compared.

Original languageEnglish (US)
Title of host publicationEPJ Web of Conferences
Volume64
DOIs
Publication statusPublished - 2014
EventPhysics at the Magnetospheric Boundary Conference - Geneva, Switzerland
Duration: Jun 25 2013Jun 28 2013

Other

OtherPhysics at the Magnetospheric Boundary Conference
CountrySwitzerland
CityGeneva
Period6/25/136/28/13

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ibgui, L., Orlando, S., Stehlé, C., Chièze, J. P., Hubeny, I. ., Lanz, T., ... Bonito, R. (2014). 3D gray radiative properties of accretion shocks in young stellar objects. In EPJ Web of Conferences (Vol. 64). [04005] https://doi.org/10.1051/epjconf/20136404005