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Emission en infrarouge moyen des poussières dans les galaxies spirales : liens avec la formation d'étoiles et avec la dynamique des galaxies barrées

Abstract : The dust emission of a sample of 69 nearby spiral galaxies was studied through observations with the ISOCAM camera between 5 and 18 microns, comprising maps in two broadband filters allowing a morphological study and five low-resolution spectra, used to identify and separate the different emission components. The usefulness of two dust species as indicators of the star formation rate was established over five orders of magnitude in star formation rate density, together with the appropriate validity limits. The properties of strongly barred galaxies were also compared to those of weakly or non-barred galaxies and interpreted in the frame of hydrodynamical models. Physical parameters regulating mid-infrared color variations were extracted and discussed.
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https://tel.archives-ouvertes.fr/tel-00122948
Contributor : Helene Roussel <>
Submitted on : Saturday, January 6, 2007 - 5:48:40 PM
Last modification on : Monday, February 10, 2020 - 6:12:38 PM
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Helene Roussel. Emission en infrarouge moyen des poussières dans les galaxies spirales : liens avec la formation d'étoiles et avec la dynamique des galaxies barrées. Astrophysique [astro-ph]. Université Louis Pasteur - Strasbourg I, 2001. Français. ⟨tel-00122948⟩

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