2016A&A...589A..59M


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.04CET14:37:58

2016A&A...589A..59M - Astronomy and Astrophysics, volume 589A, 59-59 (2016/5-1)

NuSTAR observations of water megamaser AGN.

MASINI A., COMASTRI A., BALOKOVIC M., ZAW I., PUCCETTI S., BALLANTYNE D.R., BAUER F.E., BOGGS S.E., BRANDT W.N., BRIGHTMAN M., CHRISTENSEN F.E., CRAIG W.W., GANDHI P., HAILEY C.J., HARRISON F.A., KOSS M.J., MADEJSKI G., RICCI C., RIVERS E., STERN D. and ZHANG W.W.

Abstract (from CDS):

Aims. We study the connection between the masing disk and obscuring torus in Seyfert 2 galaxies.
Methods. We present a uniform X-ray spectral analysis of the high energy properties of 14 nearby megamaser active galactic nuclei observed by NuSTAR. We use a simple analytical model to localize the maser disk and understand its connection with the torus by combining NuSTAR spectral parameters with the available physical quantities from VLBI mapping.
Results. Most of the sources that we analyzed are heavily obscured, showing a column density in excess of ∼1023cm–2; in particular, 79% are Compton-thick (NH>1.5x1024cm–2). When using column densities measured by NuSTAR with the assumption that the torus is the extension of the maser disk, and further assuming a reasonable density profile, we can predict the torus dimensions. They are found to be consistent with mid-IR interferometry parsec-scale observations of Circinus and NGC 1068. In this picture, the maser disk is intimately connected to the inner part of the torus. It is probably made of a large number of molecular clouds that connect the torus and the outer part of the accretion disk, giving rise to a thin disk rotating in most cases in Keplerian or sub-Keplerian motion. This toy model explains the established close connection between water megamaser emission and nuclear obscuration as a geometric effect.

Abstract Copyright: © ESO, 2016

Journal keyword(s): masers - galaxies: active - galaxies: Seyfert

Simbad objects: 17

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Number of rows : 17

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 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5249 1
2 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4178 2
3 NGC 1194 Sy2 03 03 49.110 -01 06 13.50   15.29 14.18     ~ 211 0
4 NGC 1386 GiP 03 36 46.238 -35 59 57.39 12.42 12.16 11.23 10.76   ~ 472 1
5 NGC 2273 Sy2 06 50 08.6724567505 +60 50 44.879789544   14.50 13.54     ~ 477 3
6 HD 266611 PM* 06 57 04.6925399981 +30 45 23.370867564   11.14   9.308   K5V 54 0
7 UGC 3789 GiG 07 19 30.892 +59 21 18.48   13.3       ~ 118 0
8 NGC 2960 LIN 09 40 36.376 +03 34 36.96   13.60       ~ 148 1
9 NGC 3079 Sy2 10 01 57.80342 +55 40 47.2428 11.57 11.54 10.86     ~ 1279 3
10 IC 2560 Sy2 10 16 18.7076737537 -33 33 49.712230914   12.53 13.31 11.25 12.2 ~ 234 0
11 NGC 3393 Sy2 10 48 23.467 -25 09 43.30   13.10 13.95 11.67 12.2 ~ 364 3
12 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2171 3
13 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1217 2
14 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5985 0
15 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1301 2
16 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1037 2
17 NGC 6264 Sy2 16 57 16.129 +27 50 58.55   15.5       ~ 97 1

    Equat.    Gal    SGal    Ecl

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2021.03.04-14:37:59

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