2011A&A...536A..35F

Query : 2011A&A...536A..35F

2011A&A...536A..35F - Astronomy and Astrophysics, volume 536A, 35-35 (2011/12-1)

Optically faint radio sources: reborn AGN?

FILHO M.E., BRINCHMANN J., LOBO C. and ANTON S.

Abstract (from CDS):

We present our discovery of several relatively strong radio sources in the field-of-view of SDSS galaxy clusters that have no optical counterparts down to the magnitude limits of the SDSS. The optically faint radio sources appear as double-lobed or core-jet objects in the FIRST radio images and have projected angular sizes ranging from 0.5 to 1.0-arcmin. We followed-up these sources with near-infrared imaging using the wide-field imager HAWK-I on the VLT. We detected K_s-band emitting regions, about 1.5-arcsec in size and coincident with the centers of the radio structures, in all sources, with magnitudes in the range 17-20mag. We used spectral modelling to characterize the sample sources. In general, the radio properties are similar to those observed in 3CRR sources but the optical-radio slopes are consistent with those of moderate to high redshift (z<4) gigahertz-peaked spectrum sources. Our results suggest that these unusual objects are galaxies whose black hole has been recently re-ignited but that retain large-scale radio structures, which are signatures of previous AGN activity.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active

Nomenclature: Tables 3,4 : [FBL2011] NNNNN Aa ; [FBL2011] NNNNN AN N=28+26

Simbad objects: 71

Full paper

View the references in ADS

Number of rows : 71

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#notes
1	FIRST J000328.7-111249	Rad	00 03 28.716	-11 12 49.23					~	1	0
2	NVSS J000328-111255	Rad	00 03 28.78	-11 12 55.1					~	1	0
3	FIRST J000328.8-111302	Rad	00 03 28.871	-11 13 02.31					~	1	0
4	[FBL2011] 11390 N	BiC	00 03 28.911	-11 12 53.63					~	1	0
5	[FBL2011] 11390 E	NIR	00 03 29.109	-11 12 52.75					~	1	0
6	FIRST J000556.7-090908	Rad	00 05 56.711	-09 09 08.57					~	1	0
7	[FBL2011] 11780 N	BiC	00 05 57.061	-09 08 58.43					~	1	0
8	NVSS J000557-090901	Rad	00 05 57.07	-09 09 01.1					~	2	0
9	[FBL2011] 11780 L	NIR	00 05 57.324	-09 08 52.20					~	1	0
10	FIRST J000557.4-090848	Rad	00 05 57.490	-09 08 48.77					~	1	0
11	Mrk 1501	Sy1	00 10 31.00590413	+10 58 29.5042981		15.96	15.40	12.22	~	706	0
12	FIRST J002452.3-005214	Rad	00 24 52.332	-00 52 14.76					~	1	0
13	NVSS J002452-005205	Rad	00 24 52.61	-00 52 05.6					~	1	0
14	[FBL2011] 6167 N	BiC	00 24 52.655	-00 52 01.49					~	1	0
15	FIRST J002452.7-005154	Rad	00 24 52.733	-00 51 54.90					~	1	0
16	[FBL2011] 3131 S2	NIR	00 34 47.211	-00 21 45.72					~	1	0
17	FIRST J003447.2-002138	Rad	00 34 47.226	-00 21 38.28					~	1	0
18	[FBL2011] 3131 S1	NIR	00 34 47.521	-00 21 45.26					~	1	0
19	FIRST J003447.6-002136	Rad	00 34 47.665	-00 21 36.57					~	1	0
20	[FBL2011] 3131 D2	NIR	00 34 47.719	-00 21 27.19					~	1	0
21	[FBL2011] 3131 N	BiC	00 34 48.040	-00 21 32.47					~	1	0
22	NVSS J003448-002131	Rad	00 34 48.07	-00 21 31.2					~	1	0
23	FIRST J003448.2-002127	Rad	00 34 48.268	-00 21 27.67					~	1	0
24	[FBL2011] 3131 L	NIR	00 34 48.333	-00 21 29.70					~	1	0
25	[FBL2011] 3131 D1	NIR	00 34 48.421	-00 21 35.99					~	1	0
26	[FBL2011] 3131 E1	NIR	00 34 48.774	-00 21 20.20					~	1	0
27	[FBL2011] 3131 E2	NIR	00 34 48.954	-00 21 25.16					~	1	0
28	[FBL2011] 3131 E3	NIR	00 34 48.990	-00 21 31.22					~	1	0
29	FIRST J004358.8+001216	Rad	00 43 58.808	+00 12 16.19					~	1	0
30	[FBL2011] 8495 Na	NIR	00 43 59.447	+00 12 30.01					~	1	0
31	SDSS J004359.47+001230.4	BiC	00 43 59.47600	+00 12 30.4409					~	2	0
32	[FBL2011] 8495 D	NIR	00 43 59.498	+00 12 26.22					~	1	0
33	[FBL2011] 8495 Nb	NIR	00 43 59.526	+00 12 30.84					~	1	0
34	FIRST J004400.1+001243	Rad	00 44 00.178	+00 12 43.26					~	1	0
35	[FBL2011] 2596 W	NIR	01 01 59.311	-10 33 10.95					~	1	0
36	FIRST J010159.6-103308	Rad	01 01 59.687	-10 33 08.76					~	1	0
37	NVSS J010200-103303	Rad	01 02 00.36	-10 33 03.1					~	1	0
38	FIRST J010200.5-103304	Rad	01 02 00.508	-10 33 04.86					~	1	0
39	[FBL2011] 2596 N	BiC	01 02 00.677	-10 33 02.46					~	1	0
40	FIRST J010201.7-103257	Rad	01 02 01.731	-10 32 57.98					~	1	0
41	[FBL2011] 2596 E	NIR	01 02 02.089	-10 32 57.99					~	1	0
42	QSO B0108+388	Bla	01 11 37.31680	+39 06 28.1039			22	22.000	~	249	1
43	FIRST J020128.1-082005	Rad	02 01 28.175	-08 20 05.50					~	1	0
44	[FBL2011] 11079 N	BiC	02 01 28.258	-08 19 56.63					~	1	0
45	NVSS J020128-081955	Rad	02 01 28.4	-08 19 56					~	3	1
46	[FBL2011] 11079 S1	NIR	02 01 28.433	-08 20 01.79					~	1	0
47	[FBL2011] 11079 S2	NIR	02 01 28.493	-08 20 11.35					~	1	0
48	FIRST J020128.6-081947	Rad	02 01 28.638	-08 19 47.07					~	1	0
49	[FBL2011] 11079 S3	NIR	02 01 28.691	-08 20 08.10					~	1	0
50	[FBL2011] 11079 L	NIR	02 01 28.865	-08 19 46.39					~	1	0
51	NVSS J021757-091822	Rad	02 17 56.5	-09 18 04					~	4	1
52	[FBL2011] 10942 W	NIR	02 17 57.166	-09 18 05.27					~	1	0
53	FIRST J021757.3-091829	Rad	02 17 57.363	-09 18 29.11					~	1	0
54	[FBL2011] 10942 N	BiC	02 17 57.382	-09 18 18.10					~	1	0
55	FIRST J021757.4-091754	Rad	02 17 57.464	-09 17 54.38					~	1	0
56	3C 219	Sy1	09 21 08.6258123424	+45 38 57.358202856		19.56	18.69		~	406	2
57	[KJK2017] J0929+4146	rG	09 29 10.660	+41 46 45.59					~	19	1
58	M 82	IG	09 55 52.430	+69 40 46.93	9.61	9.30	8.41		~	5767	6
59	4C 26.35	LIN	11 58 20.138	+26 21 12.08			18.5		~	57	2
60	3C 273	BLL	12 29 06.6998257176	+02 03 08.597629980		13.05	14.830	14.11	~	5713	1
61	NAME Hubble Deep Field	reg	12 36 49.5	+62 12 58					~	1907	1
62	ICRF J124733.3+672316	QSO	12 47 33.32959326	+67 23 16.4488689					~	82	1
63	Mrk 231	Sy1	12 56 14.2341182928	+56 52 25.238373852		14.68	13.84		~	1956	3
64	QSO B1404+286	BLL	14 07 00.39441712	+28 27 14.6901341		16.13	15.35	10.29	~	753	2
65	NAME Speca	rG	14 09 48.8587886760	-03 02 32.631257292		17.98		16.44	~	37	0
66	3C 295	Sy2	14 11 20.6	+52 12 09		22.34	20.80	18.54	~	968	5
67	IC 1065	Sy2	14 49 21.5927137128	+63 16 13.799495280		17.30	16.39		~	356	1
68	4C 33.33	rG	14 53 02.8682754912	+33 08 42.450468612					~	45	3
69	IC 4553	SyG	15 34 57.22396	+23 30 11.6084		14.76	13.88		~	2918	4
70	8C 1834+620	Sy2	18 35 10.920	+62 04 08.14					~	49	2
71	LEDA 68751	Sy1	22 23 49.5400938871	-02 06 12.859452336		16.93	15.77	16.02	~	473	2

To bookmark this query, right click on this link: simbad:objects in 2011A&A...536A..35F and select 'bookmark this link' or equivalent in the popup menu