Formal Solutions for Polarized Radiative Transfer. II. High-order Methods

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Multigrid Methods for Polarized Radiative Transfer

A new iterative method for non-LTE multilevel polarized radiative transfer in hydrogen lines is presented. Iterative methods (such as the Jacobi method) tend to damp out high-frequency components of the error fast, but converges poorly due to slow reduction of low-frequency components. The idea is to use a set of differently coarsed grids to reduce both the short-and long-period errors. This le...

متن کامل

Conservative high order positivity-preserving discontinuous Galerkin methods for linear hyperbolic and radiative transfer equations

We further investigate the high order positivity-preserving discontinuous Galerkin (DG) methods for linear hyperbolic and radiative transfer equations developed in [14]. The DG methods in [14] can maintain positivity and high order accuracy, but they rely both on the scaling limiter in [15] and a rotational limiter, the latter may alter cell averages of the unmodulated DG scheme, thereby affect...

متن کامل

High Order Positivity-Preserving Discontinuous Galerkin Methods for Radiative Transfer Equations

The positivity-preserving property is an important and challenging issue for the numerical solution of radiative transfer equations. In the past few decades, different numerical techniques have been proposed to guarantee positivity of the radiative intensity in several schemes, however it is difficult to maintain both high order accuracy and positivity. The discontinuous Galerkin (DG) finite el...

متن کامل

Polarized Radiative Transfer in Solar Atmosphere

The observations indicate the existence of linear polarization in the hydrogen Hα spectral line observed during the solar flare events. This emission of polarized radiation is of the order of 5% and is usually explained as a consequence of collisions of hydrogen atoms with the beam of fast protons coming from coronal regions. This article presents a brief overview of the recent solar flare pola...

متن کامل

High-Order Similarity Relations in Radiative Transfer: Supplementary Document

Overview This is the supplementary document for our SIGGRAPH 2014 paper titled “High-Order Similarity Relations in Radiative Transfer”. • Section 1 describes the similarity relations described in Section 4.1 of the paper. • Section 2 shows the connection between similarity theory and classical diffusion theory. We present an alternative derivation of the diffusion equation (DE) based on the ass...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The Astrophysical Journal

سال: 2017

ISSN: 1538-4357

DOI: 10.3847/1538-4357/aa7aa3