2020A&A...641A.162P


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET22:23:23

2020A&A...641A.162P - Astronomy and Astrophysics, volume 641A, 162-162 (2020/9-1)

Water megamaser emission in hard X-ray selected AGN.

PANESSA F., CASTANGIA P., MALIZIA A., BASSANI L., TARCHI A., BAZZANO A. and UBERTINI P.

Abstract (from CDS):


Context. Water megamaser emission at 22 GHz has proven to be a powerful tool for astrophysical studies of active galactic nuclei (AGN) because it allows an accurate determination of the mass of the central black hole and of the accretion disc geometry and dynamics. However, after searches among thousands of galaxies, only about 200 of them have shown such spectroscopic features, most of them of uncertain classification. In addition, the physical and geometrical conditions under which a maser activates are still unknown.
Aims. We characterize the occurrence of water maser emission in an unbiased sample of AGN by investigating the relation with the X-ray properties and the possible favourable geometry that is required to detect water maser.
Methods. We searched for 22 GHz maser emission in a hard X-ray selected sample of AGN, taken from the INTEGRAL/IBIS survey above 20 keV. Only half of the 380 sources in the sample have water maser data. We also considered a volume-limited sub-sample of 87 sources, for which we obtained new observations with the Green Bank and Effelsberg telescopes (for 35 sources). We detected one new maser and increased its radio coverage to 75%.
Results. The detection rate of water maser emission in the total sample is 15±3%. This fraction increases to 19±5% for the complete sub-sample, especially when we consider type 2 (22±5% and 31±10% for the total and complete samples, respectively) and Compton-thick AGN (56±18% and 50±35% for the total and complete samples, respectively). No correlation is found between water maser and X-ray luminosity. We note that all types of masers (disc and jet) are associated with hard X-ray selected AGN.
Conclusions. These results demonstrate that the hard X-ray selection may significantly enhance the maser detection efficiency over comparably large optical or infrared surveys. A possible decline in detection fraction with increasing luminosity might suggest that an extremely luminous nuclear environment does not favour maser emission. The large fraction of CT AGN with water maser emission could be explained in terms of geometrical effects. The maser medium would then be the very edge-on portion of the obscuring medium.

Abstract Copyright: © ESO 2020

Journal keyword(s): galaxies: active - galaxies: Seyfert - masers - X-rays: galaxies - gamma rays: galaxies - surveys

VizieR on-line data: <Available at CDS (J/A+A/641/A162): tablea1.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 49

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Number of rows : 49

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 235 Sy2 00 42 52.8103448958 -23 32 27.712826044   14.24   12.63   ~ 120 2
2 NGC 262 Sy2 00 48 47.1414900 +31 57 25.083955 14.04 13.90 13.06 8.53   ~ 680 3
3 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4141 2
4 2MASS J03181753-0017502 QSO 03 18 17.54 -00 17 50.2           ~ 8 0
5 NGC 1386 GiP 03 36 46.238 -35 59 57.39 12.42 12.16 11.23 10.76   ~ 467 1
6 3C 111 Sy1 04 18 21.2773655604 +38 01 35.801523843   19.75 18.05     ~ 863 1
7 UGC 3157 Sy2 04 46 29.758 +18 27 39.28   15.7       ~ 39 0
8 2MASS J05081968+1721481 Sy2 05 08 19.7065114077 +17 21 48.088335947   15.4       ~ 75 0
9 Mrk 3 Sy2 06 15 36.458 +71 02 15.24 14.21 14.03 12.97     ~ 855 3
10 2MASX J06302561+6340411 Sy2 06 30 25.5480050833 +63 40 41.202311865   15.7       ~ 43 2
11 NGC 2273 Sy2 06 50 08.6724567505 +60 50 44.879789544   14.50 13.54     ~ 469 3
12 HD 50282 * 06 52 22.8621103127 -05 18 58.595927725   7.260 6.282     K0III 18 0
13 Mrk 78 Sy2 07 42 41.7030525112 +65 10 37.433697338   15.57 14.58     ~ 333 2
14 NGC 2639 Sy1 08 43 38.093 +50 12 19.94 12.90 12.56 11.65     ~ 387 2
15 UGC 5101 Sy1 09 35 51.599 +61 21 11.33   15.20 15.50     ~ 511 4
16 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5381 6
17 NGC 3081 Sy2 09 59 29.5436045645 -22 49 34.748021329   13.06 13.55 11.67 12.1 ~ 416 0
18 NGC 3079 Sy2 10 01 57.80342 +55 40 47.2428 11.57 11.54 10.86     ~ 1269 3
19 IC 2560 Sy2 10 16 18.7076737537 -33 33 49.712230914   12.53 13.31 11.25 12.2 ~ 233 0
20 NGC 3393 Sy2 10 48 23.467 -25 09 43.30   13.10 13.95 11.67 12.2 ~ 359 3
21 NGC 3735 Sy2 11 35 57.327 +70 32 08.13   12.4       ~ 169 2
22 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1496 0
23 NGC 4051 Sy1 12 03 09.6098828919 +44 31 52.693714606   11.08 12.92 9.94   ~ 2013 1
24 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3412 2
25 NGC 4253 Sy1 12 18 26.5155239433 +29 48 46.518670434   14.34 13.57     ~ 942 1
26 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2138 3
27 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1204 2
28 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5365 1
29 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1286 2
30 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4041 3
31 ESO 445-50 Sy1 13 49 19.2607281800 -30 18 34.224136831   13.81 13.66 12.18   ~ 738 0
32 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1025 2
33 NGC 5506 AGN 14 13 14.901 -03 12 27.22   15.25 14.38     ~ 1001 0
34 NGC 5643 Sy2 14 32 40.778 -44 10 28.60   11.03 13.60 9.92 10.6 ~ 465 0
35 NGC 5728 Sy2 14 42 23.928 -17 15 11.41   14.34 13.40     ~ 508 0
36 2MASX J14453684+2702060 Sy1 14 45 36.845 +27 02 06.01     15.3     ~ 59 0
37 2MASX J16383091-2055246 Sy1 16 38 30.9119540441 -20 55 24.562939907   16.88   15.13   ~ 43 0
38 2MASX J16481523-3035037 Sy1 16 48 15.238 -30 35 03.78     15.8     ~ 57 0
39 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1497 2
40 NGC 6300 Sy2 17 16 59.473 -62 49 13.98   10.88 13.08 9.44 10.2 ~ 366 0
41 2MASS J17511362-2012145 Sy1 17 51 13.6163988533 -20 12 14.610272343           ~ 26 0
42 RFS 100 Rad 17 59 46.7 -22 14 06           ~ 5 0
43 ESO 103-35 Sy2 18 38 20.3207055742 -65 25 39.142872479   14.75 14.53 13.24   ~ 278 0
44 3C 403.0 Sy2 19 52 15.7997953344 +02 30 24.235518851   15.42 16.5     ~ 298 1
45 NGC 6926 Sy2 20 33 06.108 -02 01 39.07   14.87 13.87 13.0 12.5 ~ 129 2
46 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2344 1
47 4C 50.55 Sy1 21 24 39.4 +50 58 25           ~ 86 1
48 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 2025 1
49 NGC 7479 Sy2 23 04 56.668 +12 19 22.36 11.74 11.60 10.85 10.47 9.66 ~ 676 2

    Equat.    Gal    SGal    Ecl

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2020.11.28-22:23:23

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