1998A&A...335..463H

Query : 1998A&A...335..463H

1998A&A...335..463H - Astronomy and Astrophysics, volume 335, 463-466 (1998/7-2)

H2O megamaser emission from FRI radio galaxies.

HENKEL C., WANG Y.P., FALCKE H., WILSON A.S. and BRAATZ J.A.

Abstract (from CDS):

A systematic search for 22GHz H2O megamaser emission is reported for 50 nearby (z≲0.15) FRI galaxies. No detection was obtained, implying that ultraluminous H2O masers (LH2O>103L☉) must be rare in early-type galaxies with FRI radio morphology. Despite higher radio core luminosities the detection rate for our sample is lower than in similar surveys of late-type Seyfert galaxies. This puzzling difference between Seyferts and low-power radio galaxies could be explained in several ways: a) the maser emission is saturated and therefore independent of the radio core luminosity, b) the masers are unsaturated and originate in a thin circumnuclear gas disk, so the `seed' radio continuum would come from the far jet which is relativistically dimmed or c) the amount, kinematics, or the distribution of the molecular gas in the nuclei of Seyferts and radio galaxies is different. Further studies of maser properties may provide clues to the differences between radio-loud and radio-quiet AGN.

Abstract Copyright: ∼

Journal keyword(s): Masers - ISM: molecules - galaxies: elliptical and lenticular - galaxies: ISM - galaxies: active - radio lines: galaxies

Simbad objects: 51

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Number of rows : 51
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 UGC 595 AGN 00 57 34.90446247 -01 23 27.5469897   14.07 15.10     ~ 254 1
2 NGC 383 rG 01 07 24.9647814840 +32 24 45.132586200   13.6 12.14     ~ 777 3
3 PKS 0115-261 rG 01 18 16.192 -25 51 46.43     16.7     ~ 16 1
4 UGC 1841 Sy1 02 23 11.41124925 +42 59 31.3853324   15.71 14.81     ~ 561 2
5 PKS 0247-207 rG 02 49 34.311 -20 30 33.63   15.98       ~ 29 1
6 3C 75 PaG 02 57 41.64 +06 01 28.0           ~ 300 1
7 3C 76.1 rG 03 03 15.0210658512 +16 26 18.881230884   16.00 14.86     ~ 173 2
8 NGC 1218 Sy1 03 08 26.22380005 +04 06 39.3007808   12.84       ~ 381 1
9 NGC 1265 GiC 03 18 15.674 +41 51 27.94   14.7       ~ 366 2
10 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4005 3
11 2C 317 G 03 34 15.5780017080 -01 10 56.306052300     16     ~ 130 1
12 Mrk 1506 Sy1 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 1999 2
13 ESO 552-14 Sy2 04 51 20.605 -17 30 12.18   14.58   13.08   ~ 56 1
14 6dFGS gJ054754.6-195805 LIN 05 47 54.6531043440 -19 58 05.003186196   16.13 16.5 14.77   ~ 20 1
15 LEDA 19313 Sy2 06 36 32.2509554376 -20 34 53.181243300   18.27 17.58     ~ 130 4
16 Z 147-20 Sy2 07 25 37.4 +29 57 15   15.60       ~ 92 2
17 Z 118-54 rG 08 03 16.5234602568 +24 40 36.389352144   15.7       ~ 38 0
18 NAME Hya A LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1011 1
19 7C 0915+3203 AGN 09 18 57.9197964240 +31 51 10.798451460   15.5       ~ 62 1
20 MCG+05-27-013 LIN 11 11 23.7302154768 +26 57 42.593590332   14.6       ~ 54 0
21 MCG+05-27-014 LIN 11 11 25.1950902096 +26 57 48.944477520           ~ 72 0
22 NGC 3665 rG 11 24 43.630 +38 45 46.05 13.71 13.26 11.62     ~ 344 1
23 NGC 3862 Sy2 11 45 05.00904503 +19 36 22.7409909   14.98 13.97     ~ 601 3
24 ICRF J114722.1+350107 Sy2 11 47 22.1297825184 +35 01 07.538786184   17.89 16.83 10.26   ~ 174 1
25 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1223 0
26 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1762 2
27 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7181 3
28 3C 278 QSO 12 54 38.3 -12 33 27     11.6     ~ 124 3
29 NGC 4839 rG 12 57 24.3563164776 +27 29 52.203087132 13.56 13.02 12.06     ~ 466 3
30 NGC 5098 BiC 13 20 14.7283808160 +33 08 36.294146268   15.0       ~ 107 2
31 NGC 5141 Sy2 13 24 51.44109717 +36 22 42.7725745   13.9       ~ 187 1
32 Z 162-10 LIN 13 48 52.4892734448 +26 35 34.353002688   14.0       ~ 237 2
33 NGC 5532 LIN 14 16 52.9532 +10 48 26.618   13.3 12.59     ~ 347 3
34 ICRF J142440.5+263730 Sy2 14 24 40.5266308536 +26 37 30.467191764   15.6 15.62     ~ 113 1
35 4C 26.47 AGN 15 13 40.0235447784 +26 07 23.749576572   16.30       ~ 230 1
36 UGC 9799 Sy2 15 16 44.4893939136 +07 01 17.825410740   15.19 14.17     ~ 446 3
37 2MFGC 12478 G 15 27 44.4099822504 +28 55 06.607834248           ~ 76 1
38 UGC 10094 B LIN 15 56 03.8798 +24 26 53.438   15.4       ~ 97 1
39 NGC 6047 rG 16 05 08.9880545352 +17 43 47.574625512   15.4       ~ 115 1
40 NGC 6086 BiC 16 12 35.5357829352 +29 29 05.246712168   14.8       ~ 193 1
41 NGC 6137 BiC 16 23 03.1194649896 +37 55 20.550626868   14.1       ~ 128 1
42 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 763 5
43 3C 386.0 rG 18 38 26.25747 +17 11 49.6210           ~ 197 1
44 NVSS J185737+380033 rG 18 57 37.5 +38 00 31   14.9       ~ 56 1
45 3C 424 BLL 20 48 12.030 +07 01 17.48   18 18.40     ~ 141 1
46 NGC 7018 IG 21 07 25.7 -25 25 46   14.37 16.8     ~ 76 0
47 NGC 7052 rG 21 18 33.0441963648 +26 26 49.174586196 15.52 14.85 13.09     ~ 323 1
48 UGC 12064 AGN 22 31 20.5885689288 +39 21 29.593072404   14.6       ~ 437 1
49 4C 11.71 QSO 22 49 54.58599807 +11 36 30.8455760   14.4 13.01     ~ 176 2
50 LEDA 71390 Sy1 23 25 19.201 -12 07 27.04   15.45 15.46     ~ 178 2
51 NGC 7720 Sy1 23 38 29.38324020 +27 01 53.2580084   13.9 13.3     ~ 541 4

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