The dust properties and physical conditions of the interstellar medium in the LMC massive star-forming complex N11
Author
dc.contributor.author
Galametz, M.
Author
dc.contributor.author
Hony, S.
Author
dc.contributor.author
Albrecht, M.
Author
dc.contributor.author
Galliano, F.
Author
dc.contributor.author
Cormier, D.
Author
dc.contributor.author
Lebouteiller, V.
Author
dc.contributor.author
Lee, M.
Author
dc.contributor.author
Madden, S.
Author
dc.contributor.author
Bolatto, A.
Author
dc.contributor.author
Bot, C.
Author
dc.contributor.author
Hughes, A.
Author
dc.contributor.author
Israel, F.
Author
dc.contributor.author
Meixner, M.
Author
dc.contributor.author
Oliviera, J.
Author
dc.contributor.author
Paradis, D.
Author
dc.contributor.author
Pellegrini, E.
Author
dc.contributor.author
Roman Duval, Julia
Author
dc.contributor.author
Rubio López, Mónica
Author
dc.contributor.author
Sewilo, M.
Author
dc.contributor.author
Fukui, Y.
Author
dc.contributor.author
Kawamura, A.
Author
dc.contributor.author
Onishi, T.
Admission date
dc.date.accessioned
2016-07-01T17:12:27Z
Available date
dc.date.available
2016-07-01T17:12:27Z
Publication date
dc.date.issued
2016
Cita de ítem
dc.identifier.citation
MNRAS 456, 1767–1790 (2016)
en_US
Identifier
dc.identifier.other
DOI: 10.1093/mnras/stv2773
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/139369
General note
dc.description
Artículo de publicación ISI
en_US
Abstract
dc.description.abstract
We combine Spitzer and Herschel data of the star-forming region N11 in the Large Magellanic Cloud (LMC) to produce detailed maps of the dust properties in the complex and study their variations with the interstellar-medium conditions. We also compare Atacama Pathfinder EXperiment/Large APEX Bolometer Camera (APEX/LABOCA) 870 mu m observations with our model predictions in order to decompose the 870 mu m emission into dust and non-dust [free-free emission and CO(3-2) line] contributions. We find that in N11, the 870 mu m can be fully accounted for by these three components. The dust surface density map of N11 is combined with H I and CO observations to study local variations in the gas-to-dust mass ratios. Our analysis leads to values lower than those expected from the LMC low-metallicity as well as to a decrease of the gas-to-dustmass ratio with the dust surface density. We explore potential hypotheses that could explain the low 'observed' gas-to-dust mass ratios (variations in the XCO factor, presence of CO-dark gas or of optically thick H I or variations in the dust abundance in the dense regions). We finally decompose the local spectral energy distributions (SEDs) using a principal component analysis (i.e. with no a priori assumption on the dust composition in the complex). Our results lead to a promising decomposition of the local SEDs in various dust components (hot, warm, cold) coherent with that expected for the region. Further analysis on a larger sample of galaxies will follow in order to understand how unique this decomposition is or how it evolves from one environment to another.
en_US
Patrocinador
dc.description.sponsorship
NASA Herschel Science Center, JPL
1381522
1381650
1350371;
NASA
NNX14AN06G