The 2D continuum radiative transfer problem

Pascucci, Ilaria; Wolf, S.; Steinacker, Jürgen M.; Dullemond, C. P.; Henning, Th.; Niccolini, G.; Woitke, P.; López, B.

doi:10.1051/0004-6361:20040017

Cited by 117 publications

(219 citation statements)

References 46 publications

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“…In the case of the radiation benchmark test by Pascucci et al (2004), the optical depth between the stellar surface and the inner disk (the inner boundary of the spherical computational domain) is assumed to be negligible. A flow chart of the radiation module described so far is shown for a static problem such as the benchmark test of Sect.…”

Section: Irradiationmentioning

confidence: 99%

“…The setup of the following comparison is adopted from Pascucci et al (2004) and includes a central solar-type star, an irradiated circumstellar flared disk and an envelope. We have to choose a low-mass central star, because no benchmark for high-mass stars was performed so far.…”

Section: Frequency Dependent Test Of the Approximate Radiation Transportmentioning

confidence: 99%

“…The opacity tables used are the same as in the original benchmark test (Pascucci et al 2004) taken from Draine & Lee (1984). They are displayed in Fig.…”

Section: Frequency Dependent Test Of the Approximate Radiation Transportmentioning

confidence: 99%

“…With the setup of Pascucci et al (2004) the gray approximation leads to a higher radiative force than the frequency dependent ones, but in general the difference of both methods depends strongly on the stellar luminosity. The black body spectrum of more luminous stars will shift to higher frequencies (cp.…”

Section: Radiative Forcementioning

confidence: 99%

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Fast and accurate frequency-dependent radiation transport for hydrodynamics simulations in massive star formation

Kuiper

Klahr²,

Dullemond³

et al. 2010

A&A

130

173

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Context. Radiative feedback plays a crucial role in the formation of massive stars. The implementation of a fast and accurate description of the proceeding thermodynamics in pre-stellar cores and evolving accretion disks is therefore a main effort in current hydrodynamics simulations. Aims. We introduce our newly implemented three-dimensional frequency dependent radiation transport algorithm for hydrodynamics simulations of spatial configurations with a dominant central source. Methods. The module combines the advantage of the speed of an approximate flux limited diffusion (FLD) solver in the onetemperature approach, which is valid in the static diffusion limit, with the high accuracy of a frequency dependent first order raytracing routine. The ray-tracing routine especially compensates the introduced inaccuracies by standard approximate FLD solvers in transition regions from optically thin to thick and yields the correct optical depths for the frequency dependent stellar irradiation. Both components of our module make use of realistic tabulated dust opacities. The module is parallelized for distributed memory machines based on the message passing interface standard. We implemented the module in the three-dimensional high-order magnetohydrodynamics code Pluto. Results. We prove the viability of the scheme in a standard radiation benchmark test compared to a full frequency dependent MonteCarlo based radiative transfer code. The setup includes a central star, a circumstellar flared disk, as well as an envelope. The test is performed for different optical depths. Considering the frequency dependence of the stellar irradiation, the temperature distributions can be described precisely in the optically thin, thick, and irradiated transition regions. Resulting radiative forces onto dust grains are reproduced with high accuracy. The achievable parallel speedup of the method imposes no restriction on further radiative (magneto-) hydrodynamics simulations. Conclusions. The proposed approximate radiation transport method enables frequency dependent radiation hydrodynamics studies of the evolution of pre-stellar cores and circumstellar accretion disks around an evolving massive star in a highly efficient and accurate manner.

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Section: Irradiationmentioning

confidence: 99%

Section: Frequency Dependent Test Of the Approximate Radiation Transportmentioning

confidence: 99%

“…The opacity tables used are the same as in the original benchmark test (Pascucci et al 2004) taken from Draine & Lee (1984). They are displayed in Fig.…”

Section: Frequency Dependent Test Of the Approximate Radiation Transportmentioning

confidence: 99%

Section: Radiative Forcementioning

confidence: 99%

See 2 more Smart Citations

Fast and accurate frequency-dependent radiation transport for hydrodynamics simulations in massive star formation

Kuiper

Klahr²,

Dullemond³

et al. 2010

A&A

130

173

View full text Add to dashboard Cite

show abstract

“…This is trivial in Cartesian geometries, where rays can be chosen to be parallel. However, in more complicated geometries, such as for example disks with near-cylindrical symmetry and huge ratios of outer to inner radius (Pascucci et al 2004), choosing an optimal set of rays and organizing interpolations of results back and forth can be non-trivial.…”

Section: å Nordlundmentioning

confidence: 99%

Ray Casting and Flux Limited Diffusion

Nordlund¹

2010

Proc. IAU

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Abstract.Solving radiative transfer problems with ray casting methods is compared with the commonly used 'Flux Limited Diffusion' approximation. Whereas ray casting produces solutions that converge to the exact one as the number of rays is increased, flux-limited-diffusion is fundamentally a 'look-alike' method, which produces solutions that are reminiscent of the correct solution but which cannot be made to converge to it.

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