2011ApJ...736...55N

Query : 2011ApJ...736...55N

2011ApJ...736...55N - Astrophys. J., 736, 55 (2011/July-3)

Deep Spitzer observations of infrared-faint radio sources: high-redshift radio-loud active galactic nuclei?

NORRIS R.P., AFONSO J., CAVA A., FARRAH D., HUYNH M.T., IVISON R.J., JARVIS M., LACY M., MAO M., MARASTON C., MAUDUIT J.-C., MIDDELBERG E., OLIVER S., SEYMOUR N. and SURACE J.

Abstract (from CDS):

Infrared-faint radio sources (IFRSs) are a rare class of objects which are relatively bright at radio wavelengths but very faint at infrared and optical wavelengths. Here we present sensitive near-infrared observations of a sample of these sources taken as part of the Spitzer Extragalactic Representative Volume Survey. Nearly all the IFRSs are undetected at a level of ∼1 µJy in these new deep observations, and even the detections are consistent with confusion with unrelated galaxies. A stacked image implies that the median flux density is S_3.6 µm_∼ 0.2 µJy or less, giving extreme values of the radio-infrared flux density ratio. Comparison of these objects with known classes of object suggests that the majority are probably high-redshift radio-loud galaxies, possibly suffering from significant dust extinction.

Abstract Copyright: ∼

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: starburst

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 - 2026 		#notes
1 ATELAIS J002905.22-433403.9 Rad 00 29 05.2 -43 34 08           ~ 9 1
2 ATELAIS J003027.04-434948.3 Rad 00 30 27.04 -43 49 48.3           ~ 2 0
3 ATELAIS J003045.75-435926.3 Rad 00 30 45.75 -43 59 26.3           ~ 2 0
4 ATELAIS J003138.63-435220.8 Rad 00 31 38.60 -43 52 20.9           ~ 11 1
5 ATELAIS J003150.17-431235.2 Rad 00 31 50.17 -43 12 35.2           ~ 2 0
6 ATELAIS J003155.15-441610.4 Rad 00 31 55.15 -44 16 10.4           ~ 2 0
7 ATELAIS J003207.44-443957.8 Rad 00 32 07.444 -44 39 57.81           ~ 5 0
8 ATELAIS J003219.77-430315.6 Rad 00 32 19.77 -43 03 15.6           ~ 2 0
9 ATELAIS J003248.60-442625.7 Rad 00 32 48.60 -44 26 25.7           ~ 2 0
10 ATELAIS J003311.40-433547.3 Rad 00 33 11.40 -43 35 47.3           ~ 2 0
11 ATELAIS J003327.96-430439.8 Rad 00 33 27.96 -43 04 39.8           ~ 2 0
12 ATELAIS J003330.12-442115.4 Rad 00 33 30.12 -44 21 15.4           ~ 3 0
13 ATELAIS J003346.75-442902.8 Rad 00 33 46.75 -44 29 02.8           ~ 3 0
14 ATELAIS J003402.26-434008.5 Rad 00 34 02.26 -43 40 08.5           ~ 5 0
15 ATELAIS J003410.14-435625.5 Rad 00 34 10.14 -43 56 25.5           ~ 3 0
16 ATELAIS J003411.59-435817.0 Rad 00 34 11.56 -43 58 17.1           ~ 13 1
17 ATELAIS J003413.43-435802.4 Rad 00 34 13.4300 -43 58 02.470           ~ 5 0
18 ELAIS S1 reg 00 34 44 -43 28.2           ~ 254 0
19 ATELAIS J003446.40-441926.9 Rad 00 34 46.40 -44 19 26.9           ~ 3 0
20 ATELAIS J003510.80-434637.2 Rad 00 35 10.80 -43 46 37.2           ~ 3 0
21 ATELAIS J003546.92-430632.4 Rad 00 35 46.92 -43 06 32.4       24.54   ~ 3 0
22 ATELAIS J003622.25-431015.0 Rad 00 36 22.25 -43 10 15.0           ~ 3 0
23 ATELAIS J003705.54-440733.6 Rad 00 37 05.543 -44 07 33.67           ~ 5 0
24 ATELAIS J003719.58-430201.4 Rad 00 37 19.58 -43 02 01.4           ~ 3 0
25 ATELAIS J003726.34-435733.0 Rad 00 37 26.34 -43 57 33.0           ~ 3 0
26 ATELAIS J003733.42-432453.4 Rad 00 37 33.42 -43 24 53.4           ~ 3 0
27 ATELAIS J003739.09-424814.0 Rad 00 37 39.09 -42 48 14.0           ~ 2 0
28 ATELAIS J003824.94-425137.9 Rad 00 38 24.94 -42 51 37.9           ~ 3 0
29 ATELAIS J003827.17-425133.7 Rad 00 38 27.27 -42 51 35.1           ~ 8 1
30 ATELAIS J003844.13-431920.4 Rad 00 38 44.13 -43 19 20.4           ~ 5 0
31 ATELAIS J003844.72-431914.5 Rad 00 38 44.723 -43 19 14.58           ~ 4 0
32 [NAA2006] S114 Rad 03 27 59.89 -27 55 54.7           ~ 5 0
33 [NAA2006] S122 Rad 03 28 12.995 -27 19 42.69           ~ 2 0
34 [NAA2006] S164 Rad 03 29 00.20 -27 37 45.7           ~ 5 0
35 [NAA2006] S173 Rad 03 29 09.667 -27 30 13.76           ~ 2 0
36 [NAA2006] S194 Rad 03 29 28.59 -28 36 18.8           ~ 5 0
37 [NAA2006] S215 Rad 03 29 50.02 -27 31 52.6           ~ 5 0
38 [NAA2006] S241 Rad 03 30 10.22 -28 26 53.0           ~ 5 0
39 [NAA2006] S255 Rad 03 30 24.083 -27 56 58.74           ~ 3 0
40 [NAA2006] S275 Rad 03 30 43.69 -28 47 55.6           ~ 2 0
41 [NAA2006] S283 Rad 03 30 48.69 -27 44 45.3           ~ 4 0
42 ATCDFS9 J033213.04-274351.5 rG 03 32 13.08 -27 43 51.0           ~ 23 0
43 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
44 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 862 0
45 [NAA2006] S446 Rad 03 32 31.67 -28 04 35.6           ~ 16 0
46 [NAA2006] S487 Rad 03 33 01.19 -28 47 20.7           ~ 3 0
47 [NAA2006] S506 Rad 03 33 11.49 -28 03 19.0           ~ 10 0
48 ATCDFS J033330.20-283511.1 Rad 03 33 30.20 -28 35 11.1           ~ 6 0
49 [NAA2006] S588 Rad 03 34 04.709 -28 45 01.75           ~ 2 0
50 [NAA2006] S682 Rad 03 35 18.49 -27 57 42.2           ~ 2 0
51 [NAA2006] S694 Rad 03 35 25.09 -27 33 13.2           ~ 3 0
52 [NAA2006] S696 Rad 03 35 25.26 -28 31 05.2           ~ 2 0
53 NVSS J033531-272702 Rad 03 35 31.0 -27 27 02           ~ 5 1
54 [NAA2006] S706 Rad 03 35 33.22 -28 06 21.8           ~ 2 0
55 [NAA2006] S714 Rad 03 35 38.17 -27 44 00.6           ~ 2 0
56 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0
57 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
58 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
59 ELAIS N1 reg 16 10 01 +54 30.6           ~ 489 0

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