1999ApJ...526L..73R

Query : 1999ApJ...526L..73R

1999ApJ...526L..73R - Astrophys. J., 526, L73-L76 (1999/December-1)

Optically faint microjansky radio sources.

RICHARDS E.A., FOMALONT E.B., KELLERMANN K.I., WINDHORST R.A., PARTRIDGE R.B., COWIE L.L. and BARGER A.J.

Abstract (from CDS):

We report on the identifications of radio sources from our survey of the Hubble Deep Field (HDF) and the Small Selected Area 13 fields, both of which comprise the deepest radio surveys to date at 1.4 and 8.5 GHz, respectively. About 80% of the microjansky radio sources are associated with moderate-redshift starburst galaxies or active galactic nuclei within the I-magnitude range of 17-24 with a median of I=22 mag. Thirty-one (20%) of the radio sources are (1) fainter than I>25 mag, with two objects in the HDF IAB>28.5, (2) often identified with very red objects I-K>4, and (3) not significantly different in radio properties than the brighter objects. We suggest that most of these objects are associated with heavily obscured starburst galaxies with redshifts between 1 and 3. However, other mechanisms are discussed and cannot be ruled out with the present observations.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Evolution - Galaxies: Starburst - Radio Continuum: General

Nomenclature: Table 1: [RFK99] VLA JHHMMSS+DDMMSS N=31.

Simbad objects: 35

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Number of rows : 35
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 NAME SMM J123618+621554 rG 12 36 18.32 +62 15 50.5 25.84   25.58 25.07 25.0 ~ 68 0
2 [WCB2004] GOODS 850-15a mm 12 36 21.101 +62 17 09.60           ~ 35 0
3 NAME SMM J123621.3+621708 rG 12 36 21.25 +62 17 08.3   25.1     25.0 ~ 54 0
4 GOODS J123624.30+621017.3 rG 12 36 24.30 +62 10 17.2     26.4   25.0 ~ 11 0
5 CXOHDFN J123636.8+621320 rG 12 36 36.92 +62 13 20.3 30.0 27.9 28.6 28.3 26.49 ~ 26 0
6 [BCR2000] 28 rG 12 36 40.73 +62 10 11.0     26.4     ~ 11 0
7 COLDz -cont-GN-10 rG 12 36 42.093 +62 13 31.29 26.61 27.03 26.43 25.8 25.7254 ~ 75 0
8 NAME SMM J123646+621451 rG 12 36 44.03 +62 14 50.6 25.38 25.3082 25.48 24.25 24.2135 ~ 62 0
9 [R2000] J123646.698+621226.54 Rad 12 36 46.6730 +62 12 26.280   26.6 26.4   28.0 ~ 7 0
10 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1
11 CXOHDFN J123651.8+621221 AGN 12 36 51.7445 +62 12 21.438     27.6   25.80 ~ 84 0
12 [R2000] J123654.703+621039.62 Rad 12 36 54.6828 +62 10 40.429   26.6 26.4   26.20 ~ 7 0
13 NAME SMM J123656+621203 QSO 12 36 55.85 +62 12 01.2 25.62 26.7 26.12     ~ 35 0
14 NAME SMM J123656+621201 Rad 12 36 56.59 +62 12 07.4   26.22 26.4   26.20 ~ 13 0
15 NAME SMM J123700+620912 rG 12 37 00.23 +62 09 09.7     26.4   25.0 ~ 38 0
16 NAME SMM J123701+621148 rG 12 37 01.58 +62 11 46.4 28.69 25.8 25.7 25.30 25.30 ~ 55 1
17 NAME SMM J123707.2+621408 rG 12 37 07.19 +62 14 08.0 28.12 26.8993 26.6 25.6 25.3860 ~ 114 0
18 CXOHDFN J123707.9+621121 rG 12 37 07.98 +62 11 21.5   26.6 27.6   25.30 ~ 16 0
19 NAME SMM J123712.0+621325 rG 12 37 12.000 +62 13 25.83 25.92 26.0414 26.2 25.6 25.1091 ~ 70 2
20 [ABB2003] CDFN 403 rG 12 37 21.271 +62 11 29.91 24.8 24.3 24.3 23.8 25.0 ~ 31 0
21 [RFK99] VLA J131202+423751 Rad 13 12 02.79 +42 37 51.4           ~ 1 0
22 [FKP2002] SA 13 5 Rad 13 12 05.596 +42 38 51.15           ~ 2 0
23 [RFK99] VLA J131207+424013 Rad 13 12 07.14 +42 40 13.3           ~ 1 0
24 [RFK99] VLA J131213+424120 Rad 13 12 13.43 +42 41 20.0           ~ 1 0
25 [RFK99] VLA J131214+423823 Rad 13 12 14.44 +42 38 23.7           ~ 1 0
26 [FKP2002] SA 13 13 rG 13 12 14.666 +42 37 30.96   25.27       ~ 4 0
27 [FKP2002] SA 13 16 rG 13 12 16.083 +42 39 21.47   25.09       ~ 5 0
28 SSA 13 reg 13 12 16.5 +42 44 39           ~ 110 0
29 [RFK99] VLA J131217+423930 Rad 13 12 17.61 +42 39 30.6           ~ 1 0
30 [FKP2002] SA 13 22 rG 13 12 19.932 +42 38 31.39   22.27       ~ 5 0
31 [FKP2002] SA 13 23 rG 13 12 20.016 +42 39 23.97           ~ 5 0
32 [FKP2002] SA 13 24 rG 13 12 20.185 +42 37 04.02   28.81       ~ 5 0
33 [FKP2002] SA 13 25 Rad 13 12 20.236 +42 40 29.67           ~ 2 0
34 [FKP2002] SA 13 35 Rad 13 12 25.201 +42 36 56.66           ~ 2 0
35 [FKP2002] SA 13 40 rG 13 12 32.797 +42 40 38.42           ~ 2 0

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