2010A&A...518L..69B


Query : 2010A&A...518L..69B

2010A&A...518L..69B - Astronomy and Astrophysics, volume 518, L69-69 (2010/7-2)

Cool gas and dust in M 33: results from the Herschel M 33 Extended Survey (HERM33ES).

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

Abstract (from CDS):

We present an analysis of the first space-based far-IR-submm observations of M33, 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 σ using SPIRE and recent CO and HI observations; a variation in σ 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 a morphology 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 M33.

Abstract Copyright:

Journal keyword(s): galaxies: individual: M33 - Local Group - galaxies: evolution - galaxies: ISM - ISM: clouds - stars: formation

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5488 1
2 NAME Local Group GrG ~ ~           ~ 7638 0

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2022.05.21-02:37:55

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