2008ApJ...675..262R


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.17CEST21:49:58

2008ApJ...675..262R - Astrophys. J., 675, 262-280 (2008/March-1)

Mid-infrared spectroscopy of lensed galaxies at 1 < z < 3: the nature of sources near the MIPS confusion limit.

RIGBY J.R., MARCILLAC D., EGAMI E., RIEKE G.H., RICHARD J., KNEIB J.-P., FADDA D., WILLMER C.N.A., BORYS C., VAN DER WERF P.P., PEREZ-GONZALEZ P.G., KNUDSEN K.K. and PAPOVICH C.

Abstract (from CDS):

We present Spitzer IRS mid-infrared spectra for 15 gravitationally lensed, 24 µm-selected galaxies, and combine the results with four additional very faint galaxies with IRS spectra in the literature. The median intrinsic 24 µm flux density of the sample is 130 µJy, enabling a systematic survey of the spectral properties of the very faint 24 µm sources that dominate the number counts of Spitzer cosmological surveys. Six of the 19 galaxy spectra (32%) show the strong mid-IR continuua expected of AGNs; X-ray detections confirm the presence of AGNs in three of these cases, and reveal AGNs in two other galaxies. These results suggest that nuclear accretion may contribute more flux to faint 24 µm-selected samples than previously assumed. Almost all the spectra show some aromatic (PAH) emission features; the measured aromatic flux ratios do not show evolution from z=0. In particular, the high signal-to-noise mid-IR spectrum of SMM J163554.2+661225 agrees remarkably well with low-redshift, lower luminosity templates. We compare the rest-frame 8 µm and total infrared luminosities of star-forming galaxies, and find that the behavior of this ratio with total IR luminosity has evolved modestly from z=2 to z=0. Since the high aromatic-to-continuum flux ratios in these galaxies rule out a dominant contribution by AGNs, this finding implies systematic evolution in the structure and/or metallicity of infrared sources with redshift. It also has implications for the estimates of star-forming rates inferred from 24 µm measurements, in the sense that at z∼2, a given observed frame 24 µm luminosity corresponds to a lower bolometric luminosity than would be inferred from low-redshift templates of similar luminosity at the corresponding rest wavelength.

Abstract Copyright:

Journal keyword(s): Galaxies: Evolution - Galaxies: High-Redshift - Infrared: Galaxies

Nomenclature: Table 1, Fig.1: [RME2008] MS0451a N=1, [RME2008] ANNNNa N=14, [RME2008] AC114a N=1.

Simbad objects: 59

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Number of rows : 59

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASX J00285413+4308149 LIN 00 28 54.132 +43 08 14.91     16.0     ~ 30 0
2 2MASX J01405591-4602533 H2G 01 40 55.8716338374 -46 02 53.781173198   17.53   16.20   ~ 23 0
3 6dFGS gJ023813.1-473811 G 02 38 13.076 -47 38 11.34   17.402   17.336   ~ 20 1
4 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 654 0
5 NAME SMM J02399-0136 G 02 39 51.87 -01 35 58.8       21.20   ~ 179 2
6 NAME SMM J023952-0136 Sy2 02 39 51.9 -01 35 58     21.90     ~ 39 0
7 ASPECS LP.3mm.C01 AGN 03 32 38.541 -27 46 34.03 26.9734 25.3657 24.647 24.68 24.6471 ~ 45 0
8 CXOCDFS J033244.1-274636 AGN 03 32 44.007 -27 46 34.98 27.8096 25.0831 24.531 24.830 24.4864 ~ 43 0
9 NGC 1614 AGN 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 615 0
10 [RME2008] MS0451a LeG 04 54 07.12 -03 00 36.4           ~ 2 0
11 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 333 0
12 NAME IRAS 09111-1007W Sy2 09 13 36.4573260365 -10 19 29.982284396   15.7 16.10     ~ 74 1
13 NGC 2798 GiP 09 17 22.954 +41 59 58.96 13.03 13.04 12.32     ~ 300 3
14 APG 283 PaG 09 17 26.99 +41 59 48.8   12.2       ~ 193 1
15 NAME SMM J09429+4658 G 09 42 54.65 +46 58 44.7           ~ 18 0
16 ACO 851 ClG 09 42 56.6 +46 59 22           ~ 310 0
17 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5453 6
18 2XMM J105918.1+243234 LIN 10 59 18.128 +24 32 34.74   15.7       ~ 243 1
19 LEDA 39024 LIN 12 13 46.107 +02 48 41.50           ~ 315 1
20 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1830 3
21 [RME2008] A1689a EmG 13 11 28.04 -01 19 18.7           ~ 2 0
22 NAME SMM J13115-01208 G 13 11 29.14 -01 20 46.5           ~ 3 0
23 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1043 0
24 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 642 1
25 NAME SMM J140104.96+025223.5 G 14 01 04.96 +02 52 23.5           ~ 4 0
26 NAME SMM J140105+025223.5 GiC 14 01 04.969 +02 52 24.81           ~ 11 1
27 NAME SMM J141741.90+522823.6 Sy2 14 17 41.87874 +52 28 23.4232   23.62 22.945 21.56 20.417 ~ 54 0
28 2MASX J14373831-1500239 Sy1 14 37 38.317 -15 00 23.97   16.58 16.40     ~ 248 1
29 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2745 4
30 ACO 2125 ClG 15 41 14.1 +66 15 57           ~ 118 1
31 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 784 1
32 NAME SMM J16359+6612.4 LeI 16 35 54.10 +66 12 23.8           ~ 29 0
33 NAME SMM J16359+6612.6 LeI 16 35 55.18 +66 12 37.2           ~ 18 0
34 [KBV2006] SMM J163555.2+661150 smm 16 35 55.2 +66 11 50           ~ 8 0
35 [RME2008] A2218c LeG 16 35 59.12 +66 11 47.4           ~ 1 0
36 NAME SMM J16403+46440 smm 16 40 19.50 +46 44 00.5           ~ 5 0
37 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 326 0
38 LEDA 90258 H2G 16 49 14.092 +34 25 13.20           ~ 51 1
39 [YSF2007] SST24 J171138.59+583836.7 G 17 11 38.520 +58 38 38.58       23.67   ~ 13 0
40 [YCA2005] IRS 9 G 17 13 50.00 +58 56 56.8       25.73   ~ 17 0
41 [YSF2007] SST24 J171611.81+591213.3 G 17 16 11.81 +59 12 13.3       24.53   ~ 10 0
42 FLSGMRT J171804.9+600833 G 17 18 04.990 +60 08 32.28       23.48   ~ 13 0
43 [YSF2007] SST24 J171917.45+601519.9 G 17 19 17.470 +60 15 19.62       22.49   ~ 9 0
44 NAME SMM J17223+3207 smm 17 22 21.00 +32 07 05.5           ~ 4 0
45 ACO 2261 ClG 17 22 28.3 +32 09 13           ~ 301 0
46 [YSF2007] SST24 J172303.30+591600.2 G 17 23 03.310 +59 16 00.55       23.31   ~ 15 0
47 6dFGS gJ172322.0-001701 LIN 17 23 21.943 -00 17 00.96   15.1       ~ 379 0
48 [YSF2007] SST24 J172422.10+593150.8 G 17 24 22.030 +59 31 50.63       23.33   ~ 12 0
49 CXOU J215333.2+174209 QSO 21 53 33.2 +17 42 09   26.27 25.25     ~ 15 0
50 [BM2000] 0563.1+0236.0 LeG 21 53 34.390 +17 42 21.19   23.5 22.4     ~ 9 0
51 [CBK2002] 14 LeI 21 53 34.520 +17 42 02.32           ~ 11 0
52 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 637 2
53 NAME South America H2G 22 51 49.307 -17 52 23.96   16.97       ~ 291 3
54 [RME2008] AC 114a LeG 22 58 49.79 -34 48 47.0           ~ 2 0
55 ACO S 1077 ClG 22 58 52.34 -34 46 54.6           ~ 180 0
56 ESO 148-2 Sy2 23 15 46.772 -59 03 15.94   14.94 14.73 13.95   ~ 236 1
57 2MASX J23390127+3621087 SyG 23 39 01.274 +36 21 08.77   16.17       ~ 199 1
58 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 156 0
59 [RME2008] A2667a LeG 23 51 40.00 -26 04 52.0           ~ 3 0

    Equat.    Gal    SGal    Ecl

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2021.05.17-21:49:58

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