2005A&A...444..137N


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.22CEST04:28:10

2005A&A...444..137N - Astronomy and Astrophysics, volume 444, 137-155 (2005/12-2)

Dust properties of UV bright galaxies at z∼2.

NOLL S. and PIERINI D.

Abstract (from CDS):

We investigate the properties of the extinction curve in the rest-frame UV for a sample of 34 UV-luminous galaxies at 2<z<2.5, selected from the FORS Deep Field (FDF) spectroscopic survey. A new parametric description of the rest-frame UV spectral energy distribution is adopted; its sensitivity to properties of the stellar populations or of dust attenuation is established with the use of models. The latter are computed by combining composite stellar population models and calculations of radiative transfer of the stellar and scattered radiation through the dusty interstellar medium (ISM) for a dust/stars configuration describing dust attenuation in local starbursts. In the favoured configuration the stars are enveloped by a shell with a two-phase, clumpy, dusty ISM. The distribution of the z∼2 UV-luminous FDF galaxies in several diagnostic diagrams shows that their extinction curves range between those typical of the Small and Large Magellanic Clouds (SMC and LMC, respectively). For the majority of strongly reddened objects having a UV continuum slope β>-0.4 a significant 2175Å absorption feature (or ``UV bump'') is inferred, indicating an LMC-like extinction curve. On the other hand, the UV continua of the least reddened objects are mostly consistent with SMC-like extinction curves, lacking a significant UV bump, as for the sample of local starbursts investigated by Calzetti and collaborators. Furthermore, the most opaque (β∼0) and, thus (for our models), dustiest UV-luminous FDF galaxies tend to be among the most metal-rich, most massive, and largest systems at z∼2, indicating <Z≳0.5-1Z, <Mstars≳6x1010M, and <Reff≳4kpc, respectively. The presence of the UV bump does not seem to depend on the total metallicity, as given by the equivalent width (EW) of the CIV doublet. Conversely, it seems to be associated with a large average EW of the six most prominent interstellar low-ionisation absorption lines falling in the FORS spectra. The average EW of these saturated lines offers a proxy for the ISM topology. We interpret these results as the evidence for a difference in the properties of the dusty ISM among the most evolved UV-luminous, massive galaxies at z∼2.

Abstract Copyright:

Journal keyword(s): galaxies: high-redshift - galaxies: starburst - galaxies: ISM - ISM: dust, extinction - ultraviolet: galaxies

Simbad objects: 68

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Number of rows : 68

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9092 1
2 FDF 1208 G 01 05 51.87 -25 48 03.5   25.06   24.01   ~ 5 0
3 FDF 1691 G 01 05 53.71 -25 45 28.7   25.09   24.16   ~ 5 0
4 FDF 1744 G 01 05 53.90 -25 46 06.3   25.53   24.35   ~ 5 0
5 FDF 1991 G 01 05 54.83 -25 46 16.3   25.10   24.64   ~ 4 0
6 FDF 2274 G 01 05 55.89 -25 44 34.1   24.28   23.57   ~ 5 0
7 FDF 2418 G 01 05 56.44 -25 45 12.1   24.43   23.38   ~ 5 0
8 FDF 2495 G 01 05 56.75 -25 43 43.9   24.62   23.59   ~ 5 0
9 FDF 2636 G 01 05 57.31 -25 44 02.2   24.85   23.79   ~ 5 0
10 FDF 3005 G 01 05 58.61 -25 48 14.1   24.71   23.79   ~ 5 0
11 FDF 3163 G 01 05 59.17 -25 45 38.1   24.79   23.55   ~ 5 0
12 FDF 3300 G 01 05 59.64 -25 46 29.9   24.87   24.09   ~ 5 0
13 FDF 3374 G 01 05 59.88 -25 45 10.7   24.30   23.57   ~ 5 0
14 FDF 3688 G 01 06 00.89 -25 47 05.3   25.27   24.25   ~ 4 0
15 FDF 3810 G 01 06 01.32 -25 45 27.9   24.11   22.95   ~ 7 0
16 FDF 3875 G 01 06 01.51 -25 47 33.6   25.02   24.64   ~ 5 0
17 FDF 3874 G 01 06 01.51 -25 45 46.4   24.59   23.54   ~ 5 0
18 FDF 3958 G 01 06 01.84 -25 44 28.8   24.63   23.99   ~ 5 0
19 NAME FDF reg 01 06 03.6 -25 45 46           ~ 121 0
20 FDF 4795 G 01 06 04.81 -25 47 13.9   24.35   23.66   ~ 5 0
21 FDF 4871 G 01 06 05.06 -25 46 03.5   24.90   23.53   ~ 5 0
22 FDF 4996 G 01 06 05.50 -25 46 27.8   24.40   23.45   ~ 5 0
23 FDF 5058 G 01 06 05.72 -25 46 26.3   24.09   23.48   ~ 5 0
24 FDF 5135 G 01 06 05.97 -25 44 43.8       23.89   ~ 5 0
25 FDF 5165 G 01 06 06.06 -25 44 43.4   24.16   23.53   ~ 5 0
26 FDF 5190 G 01 06 06.15 -25 44 43.2   25.39   24.66   ~ 5 0
27 FDF 5227 G 01 06 06.29 -25 43 51.8   24.91   24.09   ~ 5 0
28 FDF 6024 G 01 06 09.23 -25 48 14.1   22.70   22.27   ~ 6 0
29 FDF 6372 G 01 06 10.45 -25 48 29.0   24.49   23.55   ~ 5 0
30 FDF 6407 G 01 06 10.57 -25 45 31.7   25.02   23.95   ~ 5 0
31 FDF 6934 G 01 06 12.36 -25 44 56.8   24.14   23.08   ~ 7 0
32 FDF 6947 G 01 06 12.40 -25 48 14.8   25.25   24.13   ~ 4 0
33 FDF 7029 G 01 06 12.67 -25 45 58.3   24.80   23.86   ~ 5 0
34 FDF 7078 G 01 06 12.80 -25 46 00.5   24.99   24.15   ~ 4 0
35 FDF 7307 G 01 06 13.60 -25 47 25.1   25.00   24.28   ~ 5 0
36 FDF 7342 G 01 06 13.70 -25 46 13.2   24.99   24.07   ~ 5 0
37 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1146 3
38 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5375 1
39 NGC 1313 G 03 18 16.046 -66 29 53.74   10.06 10.0 9.40 10.4 ~ 585 2
40 NGC 1510 GiP 04 03 32.640 -43 24 00.58 14.23 13.63 13.24 13.09   ~ 169 1
41 NGC 1705 SBG 04 54 13.500 -53 21 39.82 12.32 12.96 12.56 12.58 12.9 ~ 579 1
42 NGC 1741 IG 05 01 38.3 -04 15 25   13.7   13.02 13.6 ~ 248 0
43 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14327 1
44 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1026 2
45 NAME LMC 2 Supergiant Shell sh 05 41 27 -69 22.4           ~ 166 0
46 2MASX J08382309+6507160 SBG 08 38 23.093 +65 07 16.05     14.16     ~ 113 1
47 NGC 2782 Sy2 09 14 05.120 +40 06 49.68 12.29 12.30 11.63     ~ 428 3
48 Mrk 116A PaG 09 34 02.1 +55 14 25 15.33 16.08 15.98     ~ 975 2
49 NGC 3049 EmG 09 54 49.651 +09 16 17.90   13.04       ~ 281 1
50 Mrk 33 IG 10 32 31.956 +54 24 03.53 13.29 13.66 13.13 12.71 12.27 ~ 318 1
51 NGC 3353 AGN 10 45 22.390 +55 57 37.36 12.90 13.25 12.79     ~ 311 1
52 QSO J1048+4637 QSO 10 48 45.058 +46 37 18.38   25.87 24.76     ~ 111 0
53 NGC 3738 AGN 11 35 48.982 +54 31 24.70   12.12 12.04 11.56   ~ 240 0
54 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 846 1
55 NGC 4385 AGN 12 25 42.8108150606 +00 34 21.279221919   14.63 14.12 13.1 12.8 ~ 241 0
56 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 989 1
57 NGC 4670 IG 12 45 17.150 +27 07 31.76   12.6       ~ 224 0
58 Mrk 59 AGN 12 59 00.288 +34 50 42.45           ~ 309 2
59 NGC 4861 H2G 12 59 02.340 +34 51 33.98   12.90 12.32     ~ 350 2
60 Mrk 829 GiP 14 50 56.495 +35 34 18.27   14.5 14.83     ~ 192 0
61 NGC 6052 IG 16 05 12.8707837896 +20 32 32.613940524 13.01 13.44 13.00     ~ 329 2
62 ESO 338-4 IG 19 27 58.338 -41 34 30.81   13.55 13.21 13.14 13.43 ~ 204 1
63 GRB 020813A gB 19 46 41.874 -19 36 04.81           ~ 281 1
64 NGC 7496 AGN 23 09 47.2883721352 -43 25 40.268143410   11.92 13.90 10.95 11.5 ~ 219 1
65 NGC 7673 EmG 23 27 41.060 +23 35 20.18 12.84 13.17 12.76     ~ 261 1
66 NGC 7714 GiP 23 36 14.099 +02 09 18.07   14.91 14.36     ~ 719 1
67 APG 284 PaG 23 36 19 +02 09.3   12.6       ~ 602 0
68 NGC 7793 GiG 23 57 49.7533807411 -32 35 27.708304655 10.26 9.74 9.28 9.06 9.7 ~ 888 2

    Equat.    Gal    SGal    Ecl

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2019.10.22-04:28:10

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