Attenuation law of normal disk galaxies

Akio K. Inoue

doi:10.1063/1.1913942

Attenuation law of normal disk galaxies

Akio K. Inoue^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The attenuation law through the clumpy interstellar medium (ISM) in disk galaxies is investigated. I adopted the mega-grain approximation, in which dusty clumps are regarded as very large particles (i.e. mega-grains), to treat the ISM clumpiness in a 1-D plane-parallel radiative transfer with multiple anisotropic scatterings. Further, a physical model of the clumpiness was introduced as an extention of the multi-phase ISM model. In this framework, the attenuation law is determined by three physical quantities in the ISM: the mean gas density, the mean pressure, and the dust-to-gas ratio. I found that the attenuation law of normal disk galaxies is much steeper than that of starburst galaxies observed by Calzetti et al.

Original language	English
Title of host publication	SPECTRAL ENERGY DISTRIBUTIONS OF GAS-RICH GALAXIES
Subtitle of host publication	Confronting Models with Data - International Workshop
Pages	293-296
Number of pages	4
DOIs	https://doi.org/10.1063/1.1913942
Publication status	Published - 2005 Apr 11
Externally published	Yes
Event	SPECTRAL ENERGY DISTRIBUTIONS OF GAS-RICH GALAXIES: Confronting Models with Data - International Workshop - Heidelberg, Germany Duration: 2004 Oct 4 → 2004 Oct 8

Publication series

Name	AIP Conference Proceedings
Volume	761
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	SPECTRAL ENERGY DISTRIBUTIONS OF GAS-RICH GALAXIES: Confronting Models with Data - International Workshop
Country/Territory	Germany
City	Heidelberg
Period	04/10/4 → 04/10/8

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.1913942

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Inoue, AK 2005, Attenuation law of normal disk galaxies. in SPECTRAL ENERGY DISTRIBUTIONS OF GAS-RICH GALAXIES: Confronting Models with Data - International Workshop. AIP Conference Proceedings, vol. 761, pp. 293-296, SPECTRAL ENERGY DISTRIBUTIONS OF GAS-RICH GALAXIES: Confronting Models with Data - International Workshop, Heidelberg, Germany, 04/10/4. https://doi.org/10.1063/1.1913942

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AB - The attenuation law through the clumpy interstellar medium (ISM) in disk galaxies is investigated. I adopted the mega-grain approximation, in which dusty clumps are regarded as very large particles (i.e. mega-grains), to treat the ISM clumpiness in a 1-D plane-parallel radiative transfer with multiple anisotropic scatterings. Further, a physical model of the clumpiness was introduced as an extention of the multi-phase ISM model. In this framework, the attenuation law is determined by three physical quantities in the ISM: the mean gas density, the mean pressure, and the dust-to-gas ratio. I found that the attenuation law of normal disk galaxies is much steeper than that of starburst galaxies observed by Calzetti et al.

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Attenuation law of normal disk galaxies

Abstract

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