Variation in the dust spectral index across M33
Langue
en
Communication dans un congrès
Ce document a été publié dans
Proceedings of the International Astronomical Union, IAU Symposium, Volume 284, p. 125-127, 2012 - 5-9 September 2011, Preston, United Kingdom, IAU Symposium, Volume 284, p. 125-127, 2012 - 5-9 September 2011, Preston, United Kingdom, The Spectral Energy Distribution of Galaxies, 2012, Preston. 2012-08, vol. 284, p. 125-127
Cambridge University Press (CUP)
Résumé en anglais
Using the Herschel PACS and SPIRE FIR/submm data, we investigate variations in the dust spectral index β in the nearby spiral galaxy M33 at a linear resolution of 160 pc. We use an iteration method in two different approaches, ...Lire la suite >
Using the Herschel PACS and SPIRE FIR/submm data, we investigate variations in the dust spectral index β 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, β is higher in the central disk than in the outer disk similar to the dust temperature. There is a positive correlation between β and Hα 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
Mots clés en anglais
Interstellar Medium
Star formation
Dust
Galaxies: M33
Origine
Importé de halUnités de recherche