2016A&A...596A..80M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST05:13:10

2016A&A...596A..80M - Astronomy and Astrophysics, volume 596A, 80-80 (2016/12-1)

Infrared-faint radio sources in the SERVS deep fields. Pinpointing AGNs at high redshift.

MAINI A., PRANDONI I., NORRIS R.P., SPITLER L.R., MIGNANO A., LACY M. and MORGANTI R.

Abstract (from CDS):

Context. Infrared-faint radio sources (IFRS) represent an unexpected class of objects which are relatively bright at radio wavelength, but unusually faint at infrared (IR) and optical wavelengths. A recent and extensive campaign on the radio-brightest IFRSs (S1.4GHz≳10mJy) has provided evidence that most of them (if not all) contain an active galactic nuclei (AGN). Still uncertain is the nature of the radio-faintest IFRSs (S1.4GHz≲1mJy).
Aims. The scope of this paper is to assess the nature of the radio-faintest IFRSs, testing their classification and improving the knowledge of their IR properties by making use of the most sensitive IR survey available so far: the Spitzer Extragalactic Representative Volume Survey (SERVS). We also explore how the criteria of IFRSs can be fine-tuned to pinpoint radio-loud AGNs at very high redshift (z>4).
Methods. We analysed a number of IFRS samples identified in SERVS fields, including a new sample (21 sources) extracted from the Lockman Hole. 3.6 and 4.5µm IR counterparts of the 64 sources located in the SERVS fields were searched for and, when detected, their IR properties were studied.
Results. We compared the radio/IR properties of the IR-detected IFRSs with those expected for a number of known classes of objects. We found that IR-detected IFRSs are mostly consistent with a mixture of high-redshift (z≳3) radio-loud AGNs. The faintest ones (S1.4GHz∼100µJy), however, could be also associated with nearer (z∼2) dust-enshrouded star-burst galaxies. We also argue that, while IFRSs with radio-to-IR ratios >500 can very efficiently pinpoint radio-loud AGNs at redshift 2<z<4, lower radio-to-IR ratios (∼100-200) are expected for higher redshift radio-loud AGNs.

Abstract Copyright: © ESO, 2016

Journal keyword(s): galaxies: active - galaxies: high-redshift - infrared: galaxies

Nomenclature: Table B.1: [MPN2016] LHNNN N=21 among (Nos 0209-6025).

Simbad objects: 76

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Number of rows : 76

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 ATELAIS J003330.12-442115.4 Rad 00 33 30.12 -44 21 15.4           ~ 2 0
2 ATELAIS J003346.75-442902.8 Rad 00 33 46.75 -44 29 02.8           ~ 2 0
3 ATELAIS J003402.26-434008.5 Rad 00 34 02.26 -43 40 08.5           ~ 2 0
4 ATELAIS J003410.14-435625.5 Rad 00 34 10.14 -43 56 25.5           ~ 2 0
5 ATELAIS J003411.59-435817.0 Rad 00 34 11.56 -43 58 17.1           ~ 10 0
6 ATELAIS J003413.43-435802.4 Rad 00 34 13.4300 -43 58 02.470           ~ 4 0
7 ELAIS S1 reg 00 34 44 -43 28.2           ~ 155 0
8 ATELAIS J003446.40-441926.9 Rad 00 34 46.40 -44 19 26.9           ~ 2 0
9 ATELAIS J003510.80-434637.2 Rad 00 35 10.80 -43 46 37.2           ~ 2 0
10 ATELAIS J003546.92-430632.4 Rad 00 35 46.92 -43 06 32.4           ~ 2 0
11 ATELAIS J003622.25-431015.0 Rad 00 36 22.25 -43 10 15.0           ~ 2 0
12 ATELAIS J003705.54-440733.6 Rad 00 37 05.543 -44 07 33.67           ~ 5 0
13 ATELAIS J003719.58-430201.4 Rad 00 37 19.58 -43 02 01.4           ~ 2 0
14 ATELAIS J003726.34-435733.0 Rad 00 37 26.34 -43 57 33.0           ~ 2 0
15 ATELAIS J003733.42-432453.4 Rad 00 37 33.42 -43 24 53.4           ~ 2 0
16 ATELAIS J003824.94-425137.9 Rad 00 38 24.94 -42 51 37.9           ~ 2 0
17 ATELAIS J003827.17-425133.7 Rad 00 38 27.17 -42 51 33.7           ~ 3 0
18 ATELAIS J003844.13-431920.4 Rad 00 38 44.13 -43 19 20.4           ~ 3 0
19 [NAA2006] C114 Rad 03 27 50.57 -28 51 48.6           ~ 2 0
20 [NAA2006] S112 Rad 03 27 58.65 -28 53 39.9           ~ 2 0
21 ATCDFS J032843.38-282157.7 G 03 28 43.39 -28 21 57.7   21.50   19.71   ~ 3 0
22 [NAA2006] S158 Rad 03 28 54.03 -27 38 35.7           ~ 2 0
23 [NAA2006] S176 Rad 03 29 14.742 -28 09 59.71           ~ 2 0
24 [NAA2006] S194 Rad 03 29 28.59 -28 36 18.8           ~ 5 0
25 ATCDFS J032929.62-281939.4 GiC 03 29 29.63 -28 19 39.4           ~ 3 0
26 MCG-05-09-008 G 03 29 55.7413225490 -28 46 03.787740828   14.94   13.36   ~ 25 0
27 [NAA2006] S236 Rad 03 30 06.162 -27 28 24.66           ~ 2 0
28 [NAA2006] S246 Rad 03 30 15.92 -28 49 37.4           ~ 2 0
29 ATCDFS J033024.84-273419.6 G 03 30 24.85 -27 34 19.6   19.29   18.14   ~ 3 0
30 [NAA2006] S264 Rad 03 30 33.174 -28 44 27.38           ~ 2 0
31 [NAA2006] S386 Rad 03 31 56.625 -28 49 27.56           ~ 2 0
32 [NAA2006] C446 Rad 03 32 12.14 -27 26 46.2           ~ 2 0
33 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1811 1
34 [NAA2006] C487 Rad 03 32 34.97 -28 09 14.4           ~ 2 0
35 ATCDFS J033245.85-283115.2 AGN 03 32 45.8087642540 -28 31 14.792369255           ~ 3 0
36 GALEX J033307.3-281409 Rad 03 33 07.36 -28 14 10.9           ~ 5 0
37 [DAB2009] 329 AGN 03 33 33.63 -28 14 03.9           ~ 5 0
38 [NAA2006] S632 Rad 03 34 37.80 -27 59 14.3           ~ 2 0
39 [NAA2006] S643 AGN 03 34 44.30 -28 16 27.9           ~ 2 0
40 ATCDFS J033447.99-283009.5 G 03 34 47.99 -28 30 09.5   17.00   16.42   ~ 6 0
41 [NAA2006] S652 Rad 03 34 56.51 -27 47 19.6           ~ 2 0
42 [NAA2006] S655 Rad 03 34 57.32 -27 42 05.6           ~ 2 0
43 ATCDFS J033505.31-272149.6 G 03 35 05.32 -27 21 49.6           ~ 3 0
44 [MPN2016] LH5549 Rad 10 44 13.17 +58 48 33.3           ~ 1 0
45 [MPN2016] LH4124 Rad 10 44 13.77 +58 17 45.3           ~ 1 0
46 [MPN2016] LH5709 Rad 10 44 35.75 +58 53 10.0           ~ 1 0
47 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 748 0
48 [MPN2016] LH5705 Rad 10 46 04.53 +58 53 19.0           ~ 1 0
49 [MPN2016] LH4270 Rad 10 47 11.26 +58 21 46.7           ~ 1 0
50 [MPN2016] LH5995 Rad 10 47 34.56 +59 07 01.2           ~ 1 0
51 [MPN2016] LH0912 Rad 10 47 59.36 +57 17 39.8           ~ 1 0
52 [MPN2016] LH0324 Rad 10 48 06.21 +57 03 00.6           ~ 1 0
53 [MPN2016] LH6025 Rad 10 49 04.39 +59 09 13.5           ~ 1 0
54 [MPN2016] LH5512 Rad 10 49 23.18 +58 48 51.3           ~ 1 0
55 [MPN2016] LH3817 Rad 10 49 48.97 +58 12 19.6           ~ 1 0
56 [MPN2016] LH0576 Rad 10 49 56.77 +57 10 41.2           ~ 1 0
57 [MPN2016] LH0502 Rad 10 51 22.09 +57 08 55.0           ~ 1 0
58 [MPN2016] LH2316 Rad 10 51 30.82 +57 44 08.0           ~ 1 0
59 [MPN2016] LH2633 Rad 10 51 38.11 +57 49 56.8           ~ 1 0
60 [MPN2016] LH0209 Rad 10 52 39.55 +56 58 25.6           ~ 1 0
61 [MPN2016] LH5785 Rad 10 53 18.14 +58 56 22.8           ~ 1 0
62 [MPN2016] LH2417 Rad 10 54 14.89 +57 45 57.7           ~ 1 0
63 [MPN2016] LH4721 Rad 10 54 57.39 +58 31 53.5           ~ 1 0
64 [MPN2016] LH0943 Rad 10 55 48.54 +57 18 27.8           ~ 1 0
65 [MPN2016] LH1019 Rad 10 55 56.59 +57 19 59.6           ~ 1 0
66 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1777 3
67 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2679 4
68 [BGT2011] DRAO J160530.48+540902.09 Rad 16 05 30.48 +54 09 02.0           ~ 1 0
69 [BGT2011] DRAO J160647.93+541510.51 Rad 16 06 47.93 +54 15 10.5           ~ 1 0
70 [BGT2011] DRAO J160838.74+542751.88 Rad 16 08 38.74 +54 27 51.8           ~ 1 0
71 [BGT2011] DRAO J160949.75+540833.32 Rad 16 09 49.75 +54 08 33.3           ~ 1 0
72 ELAIS N1 reg 16 10 01 +54 30.6           ~ 308 0
73 [BGT2011] DRAO J161112.89+543317.64 Rad 16 11 12.89 +54 33 17.6           ~ 1 0
74 [BGT2011] DRAO J161212.29+552302.18 Rad 16 12 12.29 +55 23 02.1           ~ 1 0
75 [BGT2011] DRAO J161225.78+545503.04 Rad 16 12 25.78 +54 55 03.0           ~ 1 0
76 NAME Superantennae Sy2 19 31 21.4252803168 -72 39 21.448768732   17.39 16.37 14.65   ~ 276 2

    Equat.    Gal    SGal    Ecl

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2020.07.04-05:13:10

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