1999AJ....117.1122S

Query : 1999AJ....117.1122S

1999AJ....117.1122S - Astron. J., 117, 1122-1138 (1999/March-0)

New high-redshift radio galaxies from the MIT-Green Bank catalog.

STERN D., DEY A., SPINRAD H., MAXFIELD L., DICKINSON M., SCHLEGEL D. and GONZALEZ R.A.

Abstract (from CDS):

We present optical identifications and redshifts for 17 new high-redshift radio sources. Fifteen of these sources are radio galaxies; the remaining two are high-redshift, steep-spectrum, radio-loud quasars. These objects were discovered as part of an ongoing study of compact (θ<10"), moderately steep spectrum (α4.8GHz_1.4 GHz>0.75,Sν_∝ν–α) sources from the MIT-Green Bank (MG) radio catalog (S_5 GHz_≳50 mJy). Spectra for the optical counterparts were obtained at the W. M. Keck Telescopes and are among the optically faintest radio galaxies thus far identified. Redshifts range between 0.3 and 3.6, with 13 of the 17 at redshifts greater than 1.5. Combining these new radio galaxies with two published MG radio galaxy spectra, we synthesize a composite MG radio galaxy spectrum and discuss the properties of these galaxies in comparison with other, more powerful, radio galaxies at similar redshifts. We suggest a radio power-ionization state relation.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Early Universe - Galaxies: Active - Galaxies: Distances and Redshifts - Galaxies: Evolution - Radio Continuum

Nomenclature: Table 2: [SDS99] MG JHHMM+DDMM Star A N=17. Fig.1: [SDS99] MG J0148+1028 Galaxy a (Nos b-c).

Simbad objects: 39

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Number of rows : 39
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 2MASS J00185398+0940241 PM* 00 18 53.9836221888 +09 40 24.198552516           ~ 1 0
2 LEDA 2822124 rG 00 18 55.3 +09 40 07           ~ 10 0
3 LEDA 2822340 rG 00 46 41.5 +11 02 53           ~ 9 0
4 [SDS99] MG J0046+1102 Star A * 00 46 43.9602956304 +11 02 33.430653492           ~ 1 0
5 NVSS J012229+192339 rG 01 22 29.957 +19 23 38.45           ~ 15 1
6 2MASS J01223130+1924096 * 01 22 31.3060950816 +19 24 09.578108016           ~ 1 0
7 [SDS99] MG J0148+1028 Galaxy c G 01 48 +10.5           ~ 1 0
8 [SDS99] MG J0148+1028 Galaxy b G 01 48 +10.5           ~ 1 0
9 [SDS99] MG J0148+1028 Star A * 01 48 26.23 +10 27 52.3           ~ 1 0
10 NVSS J014828+102821 rG 01 48 28.87560 +10 28 21.3240           ~ 13 1
11 2MASS J03084031+0721176 * 03 08 40.3123725792 +07 21 18.079307496           ~ 1 0
12 [VV2000] J030842.0+072044 QSO 03 08 44.10 +07 20 14.0     21.10     ~ 6 0
13 2MASS J03115454+1532493 * 03 11 54.5577758952 +15 32 49.426928340           ~ 1 0
14 NVSS J031156+153254 rG 03 11 56.89 +15 32 54.8           ~ 14 0
15 SDSS J042223.96+081630.7 * 04 22 23.9670919560 +08 16 30.711623608           ~ 1 0
16 PMN J0422+0816 Rad 04 22 24.00288 +08 16 19.0020   20.5 20.0     ~ 7 1
17 [SDS99] MG J0511+0143 Star A * 05 11 02.9511275496 +01 41 53.791274688           ~ 1 0
18 LEDA 2824249 rG 05 11 04.8 +01 42 00           ~ 2 0
19 4C 05.41 rG 10 19 33.424 +05 34 34.83   20.0       ~ 46 1
20 [SDS99] MG J1142+1338 Star A * 11 42 22.80 +13 37 51.9           ~ 1 0
21 LEDA 2826846 rG 11 42 23.8 +13 38 01           ~ 4 0
22 [SDS99] MG J1251+1104 Star A * 12 50 58.7056538352 +11 04 45.156282420           ~ 1 0
23 NVSS J125100+110420 rG 12 51 00.063 +11 04 20.21           ~ 16 1
24 [SDS99] MG J1401+0921 Star A * 14 01 16.6 +09 20 52           ~ 1 0
25 MITG J1401+0921 rG 14 01 18.32 +09 21 23.6           ~ 10 0
26 [SDS99] MG J2037-0011 Star A * 20 37 13.0010105256 -00 10 56.715249900           ~ 1 0
27 LEDA 2830536 rG 20 37 13.5 -00 10 59           ~ 6 0
28 4C 18.61 QSO 20 41 24.0684960432 +18 55 01.715960064     20.00     ~ 18 1
29 [SDS99] MG J2041+1854 Star A * 20 41 25.2073558488 +18 55 11.193899592           ~ 1 0
30 PMN J2058+0542 rG 20 58 28.877 +05 42 50.99           ~ 13 1
31 [SDS99] MG J2058+0542 Star A * 20 58 30.2093791080 +05 42 43.930505412           ~ 1 0
32 4C 23.56 rG 21 07 15.080 +23 31 43.71           ~ 117 1
33 [SDS99] MG J2109+0326 Star A * 21 09 20.93 +03 26 30.8           ~ 1 0
34 4C 03.49 rG 21 09 21.8155 +03 26 52.335           ~ 12 1
35 [SDS99] MG J2121+1839 Star A * 21 21 25.3811417520 +18 38 53.501375472           ~ 1 0
36 MITG J2121+1839 rG 21 21 25.44 +18 39 08.6           ~ 10 0
37 4C 19.71 rG 21 44 07.54 +19 29 14.9           ~ 51 1
38 LEDA 2831610 rG 23 08 25.2 +03 37 04           ~ 14 1
39 [SDS99] MG J2308+0336 Star A * 23 08 26.07 +03 36 22.3           ~ 1 0

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