TY - JOUR UR - http://lib.ugent.be/catalog/pug01:8503051 ID - pug01:8503051 LA - eng TI - Radiative transfer in disc galaxies, V : the accuracy of the KB approximation PY - 2016 JO - (2016) MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY SN - 0035-8711 SN - 1365-2966 PB - 2016 AU - Lee, Dukhang AU - Baes, Maarten WE05 801001184568 0000-0002-3930-2757 AU - Seon, Kwang-Il AU - Camps, Peter WE05 001960644630 802001292358 0000-0002-4479-4119 AU - Verstocken, Sam WE05 000090072176 AU - Han, Wonyong AB - We investigate the accuracy of an approximate radiative transfer technique that was first proposed by Kylafis & Bahcall (hereafter the KB approximation) and has been popular in modelling dusty late-type galaxies. We compare realistic galaxy models calculated with the KB approximation with those of a three-dimensional Monte Carlo radiative transfer code SKIRT. The SKIRT code fully takes into account of the contribution of multiple scattering whereas the KB approximation calculates only single scattered intensity and multiple scattering components are approximated. We find that the KB approximation gives fairly accurate results if optically thin, face-on galaxies are considered. However, for highly inclined (i greater than or similar to 85 degrees) and/or optically thick (central face-on optical depth greater than or similar to 1) galaxy models, the approximation can give rise to substantial errors, sometimes, up to greater than or similar to 40 per cent. Moreover, it is also found that the KB approximation is not always physical, sometimes producing infinite intensities at lines of sight with high optical depth in edge-on galaxy models. There is no 'simple recipe' to correct the errors of the KB approximation that is universally applicable to any galaxy models. Therefore, it is recommended that the full radiative transfer calculation be used, even though it is slower than the KB approximation. ER -Download RIS file
| 00000nam^a2200301^i^4500 | |||
| 001 | 8503051 | ||
| 005 | 20181113145540.0 | ||
| 008 | 170119s2016------------------------eng-- | ||
| 022 | a 0035-8711 | ||
| 022 | a 1365-2966 | ||
| 024 | a 000393566000049 2 wos | ||
| 024 | a 1854/LU-8503051 2 handle | ||
| 024 | a 10.1093/mnras/stw2201 2 doi | ||
| 040 | a UGent | ||
| 245 | a Radiative transfer in disc galaxies, V : the accuracy of the KB approximation | ||
| 260 | c 2016 | ||
| 520 | a We investigate the accuracy of an approximate radiative transfer technique that was first proposed by Kylafis & Bahcall (hereafter the KB approximation) and has been popular in modelling dusty late-type galaxies. We compare realistic galaxy models calculated with the KB approximation with those of a three-dimensional Monte Carlo radiative transfer code SKIRT. The SKIRT code fully takes into account of the contribution of multiple scattering whereas the KB approximation calculates only single scattered intensity and multiple scattering components are approximated. We find that the KB approximation gives fairly accurate results if optically thin, face-on galaxies are considered. However, for highly inclined (i greater than or similar to 85 degrees) and/or optically thick (central face-on optical depth greater than or similar to 1) galaxy models, the approximation can give rise to substantial errors, sometimes, up to greater than or similar to 40 per cent. Moreover, it is also found that the KB approximation is not always physical, sometimes producing infinite intensities at lines of sight with high optical depth in edge-on galaxy models. There is no 'simple recipe' to correct the errors of the KB approximation that is universally applicable to any galaxy models. Therefore, it is recommended that the full radiative transfer calculation be used, even though it is slower than the KB approximation. | ||
| 598 | a A1 | ||
| 700 | a Lee, Dukhang 0 000141381338 9 50C9C88A-00CE-11E5-AEC4-BE56B5D1D7B1 | ||
| 700 | a Baes, Maarten u WE05 0 801001184568 0 0000-0002-3930-2757 9 F551D4EA-F0ED-11E1-A9DE-61C894A0A6B4 | ||
| 700 | a Seon, Kwang-Il | ||
| 700 | a Camps, Peter u WE05 0 001960644630 0 802001292358 0 0000-0002-4479-4119 9 1DA20960-F0EE-11E1-A9DE-61C894A0A6B4 | ||
| 700 | a Verstocken, Sam u WE05 0 000090072176 0 802001845056 9 1D047C54-F0EE-11E1-A9DE-61C894A0A6B4 | ||
| 700 | a Han, Wonyong | ||
| 650 | a Physics and Astronomy | ||
| 653 | a radiative transfer | ||
| 653 | a dust | ||
| 653 | a extinction | ||
| 653 | a Galaxy: structure | ||
| 653 | a galaxies: ISM | ||
| 653 | a SPECTRAL ENERGY-DISTRIBUTION | ||
| 653 | a MONTE-CARLO SIMULATIONS | ||
| 653 | a ACTIVE GALACTIC NUCLEI | ||
| 653 | a ON SPIRAL GALAXIES | ||
| 653 | a STAR-FORMATION | ||
| 653 | a TRANSFER CODE | ||
| 653 | a DUSTY GALAXIES | ||
| 653 | a ULTRAVIOLET EXTINCTION | ||
| 653 | a INTERSTELLAR DUST | ||
| 653 | a NEARBY GALAXIES | ||
| 773 | t MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY g Mon. Not. Roy. Astron. Soc. 2016. 463 (3) p.2912-2921 q 463:3<2912 | ||
| 856 | 3 Full Text u https://biblio.ugent.be/publication/8503051/file/8503052 z [open] y Lee et al. 2016.pdf | ||
| 920 | a article | ||
| Z30 | x WE 1 WE05 | ||
| 922 | a UGENT-WE | ||
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