Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/24427
Titolo: | Composite biasing in Monte Carlo radiative transfer | Autori: | Baes, Maarten Gordon, Karl D. Lunttila, Tuomas BIANCHI, SIMONE Camps, Peter Juvela, Mika Kuiper, Rolf |
Data pubblicazione: | 2016 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 590 | Da pagina:: | A55 | Abstract: | Biasing or importance sampling is a powerful technique in Monte Carlo radiative transfer, and can be applied in different forms to increase the accuracy and efficiency of simulations. One of the drawbacks of the use of biasing is the potential introduction of large weight factors. We discuss a general strategy, composite biasing, to suppress the appearance of large weight factors. We use this composite biasing approach for two different problems faced by current state-of-the-art Monte Carlo radiative transfer codes: the generation of photon packages from multiple components, and the penetration of radiation through high optical depth barriers. In both cases, the implementation of the relevant algorithms is trivial and does not interfere with any other optimisation techniques. Through simple test models, we demonstrate the general applicability, accuracy and efficiency of the composite biasing approach. In particular, for the penetration of high optical depths, the gain in efficiency is spectacular for the specific problems that we consider: in simulations with composite path length stretching, high accuracy results are obtained even for simulations with modest numbers of photon packages, while simulations without biasing cannot reach convergence, even with a huge number of photon packages. | URI: | http://hdl.handle.net/20.500.12386/24427 | URL: | https://www.aanda.org/articles/aa/abs/2016/06/aa28063-15/aa28063-15.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201528063 | Bibcode ADS: | 2016A&A...590A..55B | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
aa28063-15.pdf | PDF editoriale | 1.46 MB | Adobe PDF | Visualizza/apri |
Page view(s)
51
controllato il 26-apr-2024
Download(s)
12
controllato il 26-apr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.