2002A&A...387L..29H


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST10:30:19

2002A&A...387L..29H - Astronomy and Astrophysics, volume 387, L29-32 (2002/5-4)

Red-shifted H2O emission in NGC 3079: More evidence for a pc-scale circumnuclear torus?

HAGIWARA Y., HENKEL C., SHERWOOD W.A. and BAAN W.A.

Abstract (from CDS):

Using the Effelsberg 100-m telescope, sensitive measurements of the H2O megamaser in NGC 3079 are presented. During 2000-2001, ``high velocity'' features are seen that are red-shifted up to 225km/s with respect to the systemic velocity of the galaxy (VLSR∼1120km/s). Symmetrically bracketing the systemic velocity, the H2O emission covers a velocity range of ∼450km/s with only one potential narrow gap (∼20km/s) near the systemic velocity itself. Velocity drifts of individual components are not convincingly detected. It is shown that the presence of red-shifted emission and the absence of detectable velocity drifts are not inconsistent with the existence of a rotating circumnuclear maser disk at the very center of the galaxy. Significant differences in the overall line profile compared to NGC 4258 and a complex morphology of the radio continuum leave, however, space for scepticism.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual: NGC 3079 - galaxies: ISM - galaxies: nuclei - radio lines: galaxies

Simbad objects: 6

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Number of rows : 6

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 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4093 2
2 NGC 3079 Sy2 10 01 57.80342 +55 40 47.2428 11.57 11.54 10.86     ~ 1248 3
3 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2115 3
4 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1265 2
5 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3716 1
6 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1008 2

    Equat.    Gal    SGal    Ecl

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2020.07.12-10:30:19

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