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Subparsec-scale HI in the Nucleus of NGC 4151

Published online by Cambridge University Press:  13 May 2016

C.G. Mundell ,
J.M. Wrobel ,
A. Pedlar  and
J.F. Gallimore
C.G. Mundell
Affiliation:
ARI, Liverpool John Moores University, U.K. ([email protected])
J.M. Wrobel
Affiliation:
NRAO, P.O. Box O, Socorro, NM 87801
A. Pedlar
Affiliation:
JBO. Macclesfield, Cheshire, U.K.
J.F. Gallimore
Affiliation:
NRAO, 520 Edgemont Rd, Charlottesville, VA 22903

Abstract

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We present sensitive, high-resolution λ21-cm VLBA+VLA observations of the radio jet and nuclear HI absorption in NGC 4151. The 25-mas (1.6-pc) resolution continuum image reveals a highly collimated radio jet, underlying the discrete components seen previously with MERLIN and the VLA. Spatially and kinematically complex HI absorption is detected against the whole 3-pc extent of the continuum component predicted by Ulvestad et al. to contain the AGN. Instead, we suggest the component against which the absorption is detected is part of the eastern counterjet, ruling it out as the location for the AGN.

Type
The Inner Regions of Galaxies
Information
Symposium - International Astronomical Union , Volume 205: Galaxies and their Constituents at the Highest Angular Resolutions , 2001 , pp. 192 - 193
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

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