2018A&A...612A..81R


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.16CET03:34:25

2018A&A...612A..81R - Astronomy and Astrophysics, volume 612A, 81-81 (2018/4-1)

Gathering dust: A galaxy-wide study of dust emission from cloud complexes in NGC 300.

RIENER M., FAESI C.M., FORBRICH J. and LADA C.J.

Abstract (from CDS):


Aims. We use multi-band observations by the Herschel Space Observatory to study the dust emission properties of the nearby spiral galaxy NGC 300. We compile a first catalogue of the population of giant dust clouds (GDCs) in NGC 300, including temperature and mass estimates, and give an estimate of the total dust mass of the galaxy.
Methods. We carried out source detection with the multiwavelength source extraction algorithm getsources. We calculated physical properties, including mass and temperature, of the GDCs from five-band Herschel PACS and SPIRE observations from 100 to 500µm; the final size and mass estimates are based on the observations at 250µm that have an effective spatial resolution of ∼170 pc. We correlated our final catalogue of GDCs to pre-existing catalogues of HII regions to infer the number of GDCs associated with high-mass star formation and determined the Hα emission of the GDCs.
Results. Our final catalogue of GDCs includes 146 sources, 90 of which are associated with known HII regions. We find that the dust masses of the GDCs are completely dominated by the cold dust component and range from ∼1.1x103 to 1.4x104M. The GDCs have effective temperatures of ∼13-23K and show a distinct cold dust effective temperature gradient from the centre towards the outer parts of the stellar disk. We find that the population of GDCs in our catalogue constitutes ∼16% of the total dust mass of NGC 300, which we estimate to be about 5.4x106M. At least about 87% of our GDCs have a high enough average dust mass surface density to provide sufficient shielding to harbour molecular clouds. We compare our results to previous pointed molecular gas observations in NGC 300 and results from other nearby galaxies and also conclude that it is very likely that most of our GDCs are associated with complexes of giant molecular clouds.

Abstract Copyright: © ESO 2018

Journal keyword(s): methods: observational - galaxies: star formation - ISM: clouds

VizieR on-line data: <Available at CDS (J/A+A/612/A81): tableb1.dat figd1.pdf>

Nomenclature: Table B.1: [RFF2018] NNN (Nos 1-146).

Status in Simbad:  could be processed

Simbad objects: 20

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Number of rows : 20

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10616 1
2 [DCL88] 57 HII 00 54 44.54 -37 36 35.5           ~ 3 0
3 [PFP2004] J005445.3-373842 HII 00 54 45.40 -37 38 39.3           ~ 4 0
4 [DCL88] 69 HII 00 54 48.11 -37 43 31.3           ~ 5 0
5 [DCL88] 70 HII 00 54 48.79 -37 39 45.1           ~ 3 0
6 [DCL88] 73 HII 00 54 49.59 -37 44 48.7           ~ 2 0
7 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1273 2
8 [DCL88] 97 HII 00 54 56.30 -37 45 46.5           ~ 3 0
9 [DCL88] 102 HII 00 54 57.47 -37 44 03.2           ~ 2 0
10 [DCL88] 121 HII 00 55 04.16 -37 46 23.3           ~ 2 0
11 [DCL88] 118B HII 00 55 04.58 -37 42 49.2           ~ 5 0
12 [DCL88] 140 HII 00 55 14.96 -37 44 14.7           ~ 5 0
13 [DCL88] 149 HII 00 55 27.91 -37 40 55.8           ~ 2 0
14 [DCL88] 156 HII 00 55 31.14 -37 41 15.0           ~ 2 0
15 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5038 1
16 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5410 1
17 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14392 1
18 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2171 2
19 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2479 2
20 NAME Local Group GrG ~ ~           ~ 6701 0

    Equat.    Gal    SGal    Ecl

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2019.12.16-03:34:25

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