Multi-dimensional cosmological radiative transfer with a Variable Eddington Tensor formalism Export

@article{citeulike:2460742, abstract = {We present a new approach to numerically model continuum radiative transfer based on the Optically Thin Variable Eddington Tensor (OTVET) approximation. Our method insures the exact conservation of the photon number and flux (in the explicit formulation) and automatically switches from the optically thick to the optically thin regime. It scales as /N log N with the number of hydrodynamic resolution elements and is independent of the number of sources of ionizing radiation (i.e. works equally fast for an arbitrary source function). We also describe an implementation of the algorithm in a Soften Lagrangian Hydrodynamic code (SLH) and a multi-frequency approach appropriate for hydrogen and helium continuum opacities. We present extensive tests of our method for single and multiple sources in homogeneous and inhomogeneous density distributions, as well as a realistic simulation of cosmological reionization.}, archivePrefix = {arXiv}, author = {Gnedin, N. Y. and Abel, T.}, citeulike-article-id = {2460742}, citeulike-linkout-0 = {http://arxiv.org/abs/astro-ph/0106278}, citeulike-linkout-1 = {http://arxiv.org/pdf/astro-ph/0106278}, citeulike-linkout-2 = {http://dx.doi.org/10.1016/S1384-1076(01)00068-9}, citeulike-linkout-3 = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2001NewA....6..437G}, comment = {Multi--dimensional Cosmological Radiative Transfer with a Variable Eddington Tensor Formalism Authors: Nickolay Y. Gnedin, Tom Abel (Submitted on 15 Jun 2001) Abstract: We present a new approach to numerically model continuum radiative transfer based on the Optically Thin Variable Eddington Tensor (OTVET) approximation. Our method insures the exact conservation of the photon number and flux (in the explicit formulation) and automatically switches from the optically thick to the optically thin regime. It scales as N logN with the number of hydrodynamic resolution elements and is independent of the number of sources of ionizing radiation (i.e. works equally fast for an arbitrary source function). We also describe an implementation of the algorithm in a Soften Lagrangian Hydrodynamic code (SLH) and a multi--frequency approach appropriate for hydrogen and helium continuum opacities. We present extensive tests of our method for single and multiple sources in homogeneous and inhomogeneous density distributions, as well as a realistic simulation of cosmological reionization. }, doi = {10.1016/S1384-1076(01)00068-9}, eprint = {astro-ph/0106278}, journal = {New Astronomy}, keywords = {cosmology, radiative, transfer}, month = {October}, pages = {437--455}, posted-at = {2008-03-03 12:19:47}, priority = {2}, title = {Multi-dimensional cosmological radiative transfer with a Variable Eddington Tensor formalism}, url = {http://dx.doi.org/10.1016/S1384-1076(01)00068-9}, volume = {6}, year = {2001} }

TY - JOUR ID - citeulike:2460742 L3 - citeulike-article-id:2460742 N2 - We present a new approach to numerically model continuum radiative transfer based on the Optically Thin Variable Eddington Tensor (OTVET) approximation. Our method insures the exact conservation of the photon number and flux (in the explicit formulation) and automatically switches from the optically thick to the optically thin regime. It scales as /N log N with the number of hydrodynamic resolution elements and is independent of the number of sources of ionizing radiation (i.e. works equally fast for an arbitrary source function). We also describe an implementation of the algorithm in a Soften Lagrangian Hydrodynamic code (SLH) and a multi-frequency approach appropriate for hydrogen and helium continuum opacities. We present extensive tests of our method for single and multiple sources in homogeneous and inhomogeneous density distributions, as well as a realistic simulation of cosmological reionization. JF - New Astronomy EP - 455 TI - Multi-dimensional cosmological radiative transfer with a Variable Eddington Tensor formalism VL - 6 SP - 437 KW - cosmology KW - radiative KW - transfer N1 - Multi--dimensional Cosmological Radiative Transfer with a Variable Eddington Tensor Formalism Authors: Nickolay Y. Gnedin, Tom Abel (Submitted on 15 Jun 2001) Abstract: We present a new approach to numerically model continuum radiative transfer based on the Optically Thin Variable Eddington Tensor (OTVET) approximation. Our method insures the exact conservation of the photon number and flux (in the explicit formulation) and automatically switches from the optically thick to the optically thin regime. It scales as N logN with the number of hydrodynamic resolution elements and is independent of the number of sources of ionizing radiation (i.e. works equally fast for an arbitrary source function). We also describe an implementation of the algorithm in a Soften Lagrangian Hydrodynamic code (SLH) and a multi--frequency approach appropriate for hydrogen and helium continuum opacities. We present extensive tests of our method for single and multiple sources in homogeneous and inhomogeneous density distributions, as well as a realistic simulation of cosmological reionization. AU - Gnedin, NY AU - Abel, T PY - 2001/October// UR - http://dx.doi.org/10.1016/S1384-1076(01)00068-9 ER -