BRAINE, J.; GRATIER, P.; KRAMER, C.; XILOURIS, E.M.; ROSOLOWSKY, E.; BUCHBENDER, C.; BOQUIEN, M.; CALZETTI, D.; QUINTANA-LACACI, G.; TABATABAEI, F.; VERLEY, S.; ISRAEL, F.; VAN DER TAK, Floris; AALTO, Samuli; COMBES, F.; GARCIA-BURILLO, S.; GONZALEZ, M.; HENKEL, Carsten; KORIBALSKI, B.; MOOKERJEA, B.; ROELLIG, M.; SCHUSTER, K. F.; RELANO, M.; BERTOLDI, F.; VAN DER WERF, Paul; WIEDNER, M.

doi:10.1051/0004-6361/201014551

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BRAINE, J.
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]

GRATIER, P.
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]

KRAMER, C.
Instituto de RadioAstronomía Milimétrica [IRAM]

KRAMER, C.
Instituto de RadioAstronomía Milimétrica [IRAM]

XILOURIS, E.M.
Institute of Astronomy and Astrophysics,

ROSOLOWSKY, E.
University of British Columbia [Canada] [UBC]

BUCHBENDER, C.
Instituto de RadioAstronomía Milimétrica [IRAM]

BOQUIEN, M.
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
Department of Astronomy

CALZETTI, D.
Department of Astronomy

QUINTANA-LACACI, G.
Instituto de RadioAstronomía Milimétrica [IRAM]

TABATABAEI, F.
Institut für Physik [Potsdam]

VERLEY, S.
Dept. fısica Teorica y del Cosmos

ISRAEL, F.
Leiden Observatory [Leiden]

VAN DER TAK, Floris
SRON Netherlands Institute for Space Research [SRON]
Max-Planck-Institut für Radioastronomie [MPIFR]

AALTO, Samuli
TKK Helsinki University of Technology [TKK]

COMBES, F.
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]

GARCIA-BURILLO, S.
Observatorio Astronomico Nacional, Madrid

GONZALEZ, M.
Fundación Venezolana de Investigaciones Sismológicas [FUNVISIS]
Instituto de Ciencias de la Tierra

HENKEL, Carsten
Institut für Physik [Potsdam]

KORIBALSKI, B.
Australia Telescope National Facility

MOOKERJEA, B.
KOSMA, I. Physikalisches Institut

ROELLIG, M.
KOSMA,

SCHUSTER, K. F.
Institut de RadioAstronomie Millimétrique [IRAM]

RELANO, M.
Dpto. Fisica Teorica y del Cosmos

BERTOLDI, F.
Max-Planck-Institut für Radioastronomie [MPIFR]

VAN DER WERF, Paul
Leiden Observatory [Leiden]

WIEDNER, M.
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]

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Astronomy and Astrophysics - A&A. 2010, vol. 518, p. L69

EDP Sciences

Resumen en inglés

We present an analysis of the first space-based far-IR-submm observations of M 33, which measure the emission from the cool dust and resolve the giant molecular cloud complexes. With roughly half-solar abundances, M33 is a first step towards young low-metallicity galaxies where the submm may be able to provide an alternative to CO mapping to measure their H2 content. In this Letter, we measure the dust emission cross-section using SPIRE and recent CO and Hi observations; a variation in is present from a near-solar neighborhood cross-section to about half-solar with the maximum being south of the nucleus. Calculating the total H column density from the measured dust temperature and cross-section, and then subtracting the Hi column, yields amorphology similar to that observed in CO. The H2/Hi mass ratio decreases from about unity to well below 10% and is about 15% averaged over the optical disk. The single most important observation to reduce the potentially large systematic errors is to complete the CO mapping of M 33.< Leer menos

Palabras clave en inglés

Galaxies: Individual: M 33

Galaxies: Local Group

Galaxies: evolution

Galaxies: ISM

ISM: Clouds

Stars: Formation

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Cool gas and dust in M33: Results from the Herschel M33 extended survey (HERM33ES)

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