2003A&A...400..457H


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST20:19:14

2003A&A...400..457H - Astronomy and Astrophysics, volume 400, 457-463 (2003/3-3)

Location of H2O maser in the double-nuclei system of NGC 6240.

HAGIWARA Y., DIAMOND P.J. and MIYOSHI M.

Abstract (from CDS):

We performed VLA observations of the 22 GHz H2O maser emission in the merging galaxy NGC 6240, which hosts the well-known double active nuclei. In a previous paper, we reported on the first solid detection of the H2O maser emission in 2001. After two abortive attempts due to the weakness and probable variability of the emission, the maser was detected with the VLA in June 2002. The emission is unresolved at ∼0.3arcsec and coincides with the southern 22GHz continuum peak to ∼0.007arcsec (∼3pc: D=97Mpc). The detection of the maser in the southern nucleus indicates that nuclear activity of the galaxy, which is significant in X-ray and far-infrared (FIR) bands, lies mainly in the southern nucleus, and the nucleus without a high brightness peak could be explained by thick dust emitting FIR radiation. We favour the idea that the maser in NGC 6240 is associated with the AGN-activity.

Abstract Copyright:

Journal keyword(s): masers - galaxies: active - galaxies: individual: NGC 6240 - radio lines: ISM

CDS comments: Fig. 2 : Components S and N = [CWB94] N1, N2.

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2929 2
2 NGC 449 Sy2 01 16 07.2096682810 +33 05 21.651153340   15.90 14.96     ~ 267 4
3 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2113 3
4 NGC 5506 AGN 14 13 14.901 -03 12 27.22   15.25 14.38     ~ 990 0
5 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1479 2
6 [CWB94] N2 Rad 16 52 58.90 +02 24 04.5           ~ 3 0
7 [CWB94] N1 Rad 16 52 58.916 +02 24 04.77           ~ 6 0
8 QSO J1658+0741 QSO 16 58 09.01146700 +07 41 27.5405227   19.993 19.5 19.598   ~ 156 1

    Equat.    Gal    SGal    Ecl

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2020.07.04-20:19:14

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