TABATABAEI, F. S.; BRAINE, J.; KRAMER, C.; XILOURIS, M.; BOQUIEN, M.; VERLEY, S.; SCHINNERER, E.; CALZETTI, D.; COMBES, F.; ISRAEL, F.; HENKEL, C.; THE HERM33ES TEAM

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TABATABAEI, F. S.

BRAINE, J.
FORMATION STELLAIRE 2011

KRAMER, C.
Instituto de RadioAstronomía Milimétrica [IRAM]

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Ce document a été publié dans

Proceedings IAU Symposium No. 284, 2011, R.J. Tuffs & C.C.Popescu, eds, Proceedings IAU Symposium No. 284, 2011, R.J. Tuffs & C.C.Popescu, eds, The Spectral Energy Distribution of Galaxies, 2011, Preston. 2011-11, vol. 1111, p. 6740

Résumé en anglais

Using the Herschel PACS and SPIRE FIR/submm data, we investigate variations in the dust spectral index $\beta$ in the nearby spiral galaxy M33 at a linear resolution of 160 pc. We use an iteration method in two different approaches, single and two-component modified black body models. In both approaches, $\beta$ is higher in the central disk than in the outer disk similar to the dust temperature. There is a positive correlation between $\beta$ and Halpha as well as with the molecular gas traced by CO(2-1). A Monte-Carlo simulation shows that the physical parameters are better constrained when using the two-component model.< Réduire

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Astrophysics

Cosmology and Extragalactic Astrophysics

Origine

Importé de hal

Unités de recherche

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804