2011A&A...532A..56G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.16CEST06:35:54

2011A&A...532A..56G - Astronomy and Astrophysics, volume 532A, 56-56 (2011/8-1)

Probing the dust properties of galaxies up to submillimetre wavelengths. II. Dust-to-gas mass ratio trends with metallicity and the submm excess in dwarf galaxies.

GALAMETZ M., MADDEN S.C., GALLIANO F., HONY S., BENDO G.J. and SAUVAGE M.

Abstract (from CDS):

We are studying the effects of submm observations on the total dust mass and thus dust-to-gas mass ratio measurements. We gather a wide sample of galaxies that have been observed at submillimeter (submm) wavelengths to model their spectral energy distributions using submm observations (>160µm) and then without submm observational constraints in order to quantify the error on the dust mass when submm data are not available. Our model does not make strong assumptions on the dust temperature distribution to precisely avoid submm biaises in the study. Our sample includes 52 galaxies observed at submm wavelengths. Out of these, 9 galaxies show an excess in submm which is not accounted for in our fiducial model, most of these galaxies being low-metallicity dwarfs. We chose to add an independant very cold dust component (T=10K) to account for this excess. We find that metal-rich galaxies modelled with submm data often show lower dust masses than when modelled without submm data. Indeed, these galaxies usually have dust SEDs that peaks at longer wavelengths and require constraints above 160µm to correctly position the peak and sample the submillimeter slope of their SEDs and thus correctly cover the dust temperature distribution. On the other hand, some metal-poor dwarf galaxies modelled with submm data show higher dust masses than when modelled without submm data. Using submm constraints for the dust mass estimates, we find a tightened correlation of the dust-to-gas mass ratio with the metallicity of the galaxies. We also often find that when there is a submm excess present, it occurs preferentially in low-metallicity galaxies. We analyse the conditions for the presence of this excess and find a relation between the 160/850µm ratio and the submm excess.

Abstract Copyright:

Journal keyword(s): galaxies: ISM - galaxies: dwarf - infrared: ISM - dust, extinction

Simbad objects: 56

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Number of rows : 56

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 ESO 350-38 AGN 00 36 52.489 -33 33 17.23   14.31 14.41 13.49   ~ 291 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9448 1
3 NGC 337 EmG 00 59 50.090 -07 34 40.66 11.97 12.06 11.61 12.4 12.2 ~ 229 1
4 MCG+02-04-025 LIN 01 20 02.654 +14 21 41.73   14.9       ~ 131 0
5 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1521 2
6 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4093 2
7 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1174 3
8 NGC 1140 EmG 02 54 33.5258827369 -10 01 43.135585379 12.41 12.84 12.49 13.6 13.5 ~ 261 1
9 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5669 1
10 NGC 1222 SBG 03 08 56.747 -02 57 18.76   13.3   13.0 13.2 ~ 172 0
11 SBSG 0335-052 bCG 03 37 44.04 -05 02 38.5     16.65     ~ 433 1
12 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1386 1
13 NGC 1482 GiP 03 54 38.928 -20 30 08.82 13.15 13.14 12.15 11.29   ~ 258 2
14 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1149 3
15 NGC 1705 SBG 04 54 13.500 -53 21 39.82 12.32 12.96 12.56 12.58 12.9 ~ 596 1
16 NGC 1741 IG 05 01 38.3 -04 15 25   13.7   13.02 13.6 ~ 250 0
17 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 651 3
18 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14837 1
19 UGCA 116 H2G 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 501 0
20 ESO 495-21 bCG 08 36 15.190 -26 24 33.66 12.04 11.93 11.45 11.09 12.3 ~ 501 3
21 NGC 2798 GiP 09 17 22.954 +41 59 58.96 13.03 13.04 12.32     ~ 294 3
22 NGC 2905 H2G 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 986 3
23 Mrk 116 PaG 09 34 02.1 +55 14 25           ~ 997 1
24 NGC 2976 GiP 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 581 1
25 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5338 6
26 NGC 3189 GiP 10 18 05.643 +21 49 54.98 12.60 12.12 11.15 11.14   ~ 357 2
27 Mrk 33 IG 10 32 31.956 +54 24 03.53 13.29 13.66 13.13 12.71 12.27 ~ 323 1
28 NGC 3521 LSB 11 05 48.5676206040 -00 02 09.228156576 10.06 9.83 9.02 10.1 9.6 ~ 696 2
29 M 66 GiP 11 20 15.026 +12 59 28.64 9.85 9.65 8.92     ~ 1159 4
30 Mrk 1304 IG 11 42 12.253 +00 20 03.68   14.16 13.67 13.41 13.03 ~ 151 0
31 NGC 3994 LIN 11 57 36.866 +32 16 39.45   13.51 12.87     ~ 166 1
32 NGC 3995 rG 11 57 44.098 +32 17 38.64   12.81       ~ 153 0
33 M 61 Sy2 12 21 54.9275149050 +04 28 25.588335799 10.07 10.18 9.65     ~ 871 2
34 NGC 4536 GiP 12 34 27.129 +02 11 16.37 11.14 11.16 10.55 17.393   ~ 748 3
35 M 90 Sy2 12 36 49.816 +13 09 46.33 10.56 10.26 9.54     ~ 795 1
36 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 970 2
37 NGC 4670 IG 12 45 17.150 +27 07 31.76   12.6       ~ 229 0
38 M 64 SyG 12 56 43.696 +21 40 57.57   9.36 8.52     ~ 813 2
39 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3783 4
40 NGC 5195 GiP 13 29 59.590 +47 15 58.06 10.76 10.45 9.55 9.31   ~ 696 3
41 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2230 2
42 NGC 5256 PaG 13 38 17.8 +48 16 41   14.1 13.42     ~ 396 2
43 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33   ~ 1269 4
44 NGC 5713 GiP 14 40 11.528 -00 17 21.16 11.88 11.84 11.20     ~ 350 2
45 M 102 SyG 15 06 29.561 +55 45 47.91 11.12 10.74 9.89     ~ 502 3
46 NGC 5929 GiP 15 26 06.158 +41 40 14.40   13.0 14.00     ~ 414 0
47 NGC 5930 GiP 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 412 0
48 NGC 5953 GiP 15 34 32.402 +15 11 37.80   13.23 12.45     ~ 337 1
49 NGC 6052 IG 16 05 12.8707837896 +20 32 32.613940524 13.01 13.44 13.00     ~ 331 2
50 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1481 2
51 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2235 2
52 NGC 7331 LIN 22 37 04.102 +34 24 57.31 10.65 10.35 9.48     ~ 1110 2
53 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1888 3
54 NGC 7552 GiP 23 16 10.767 -42 35 05.39 11.34 11.22 10.57 10.08 11.1 ~ 507 3
55 NGC 7674 Sy2 23 27 56.6974755223 +08 46 44.238278540 13.84 13.92 13.23 12.64   ~ 637 4
56 NGC 7714 GiP 23 36 14.099 +02 09 18.07   14.91 14.36     ~ 728 1

    Equat.    Gal    SGal    Ecl

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2020.07.16-06:35:54

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