Native Synthetic Imaging of Smoothed Particle Hydrodynamics density fields using gridless Monte Carlo Radiative Transfer

Abstract

An algorithm for creating synthetic telescope images of Smoothed Particle Hydrodynamics (SPH) density fields is presented, which utilises the adaptive nature of the SPH formalism in full. The imaging process uses Monte Carlo Radiative Transfer (MCRT) methods to model the scattering and absorption of photon packets in the density field, which then exit the system and are captured on a pixelated image plane, creating a 2D image (or a 3D datacube, if the photons are also binned by their wavelength). The algorithm is implemented on the density field directly: no gridding of the field is required, allowing the density field to be described to an identical level of accuracy as the simulations that generated it. Some applications of the method to star and planet formation simulations are presented to illustrate the advantages of this new technique, and suggestions as to how this framework could support a Radiative Equilibrium algorithm are also given as an indication for future development.

10 pages, 10 figures, accepted for publication in MNRAS

References in corpus (14)

• SPLASH: An interactive visualisation tool for Smoothed Particle Hydrodynamics simulations
• Monte Carlo radiative transfer in protoplanetary disks
• The impact of magnetic fields on single and binary star formation
• Fragmentation of gravitationally unstable gaseous protoplanetary disks with radiative transfer
• Radiative transfer and the energy equation in SPH simulations of star formation
• TRAPHIC - Radiative Transfer for Smoothed Particle Hydrodynamics Simulations
• Smoothed Particle Hydrodynamics simulations of expanding HII regions. I. Numerical methods and tests
• Introducing a Hybrid Method of Radiative Transfer for Smoothed Particle Hydrodynamics
• SPHRAY: A Smoothed Particle Hydrodynamics Ray Tracer for Radiative Transfer
• Enhanced Dust Emission in the HL Tau Disc: A Low-Mass Companion in Formation?
• Stellar Encounters in the Context of Outburst Phenomena
• Encounter-driven accretion in young stellar clusters - A connection to FUors?
• Stellar Encounters: A Stimulus for Disc Fragmentation?
• An implicit method for radiative transfer with the diffusion approximation in SPH

Cited by in corpus (5)

• Challenges in Forming Planets by Gravitational Instability: Disk Irradiation and Clump Migration, Accretion & Tidal Destructio
• The effect of radiative feedback on disc fragmentation
• Turbulent Linewidths as a Diagnostic of Self-Gravity in Protostellar Discs
• SPAMCART: a code for smoothed particle Monte Carlo radiative transfer
• Modelling of ionising feedback with Smoothed Particle Hydrodynamics and Monte Carlo Radiative Transfer on a Voronoi grid