Subparsec-scale HI in the nucleus of NGC 4151

Carole Mundell; J. M. Wrobel; A. Pedlar; Jack F. Gallimore

Subparsec-scale HI in the nucleus of NGC 4151

Carole Mundell, J. M. Wrobel, A. Pedlar, Jack F. Gallimore

Department of Physics

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Abstract

We present sensitive, high-resolution 21-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.

Original language	English
Title of host publication	Galaxies and their Constituents at the Highest Angular Resolutions
Subtitle of host publication	Proceedings of IAU Symposium #205, held 15-18 August 2000
Editors	R. T. Schilizzi
Pages	192
Publication status	Published - Jan 2001

Cite this

Subparsec-scale HI in the nucleus of NGC 4151. / Mundell, Carole; Wrobel, J. M.; Pedlar, A. et al.
Galaxies and their Constituents at the Highest Angular Resolutions: Proceedings of IAU Symposium #205, held 15-18 August 2000 . ed. / R. T. Schilizzi. 2001. p. 192.

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

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title = "Subparsec-scale HI in the nucleus of NGC 4151",

abstract = " We present sensitive, high-resolution 21-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. ",

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T1 - Subparsec-scale HI in the nucleus of NGC 4151

AU - Mundell, Carole

AU - Wrobel, J. M.

AU - Pedlar, A.

AU - Gallimore, Jack F.

PY - 2001/1

Y1 - 2001/1

N2 - We present sensitive, high-resolution 21-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.

AB - We present sensitive, high-resolution 21-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.

M3 - Chapter in a published conference proceeding

SP - 192

BT - Galaxies and their Constituents at the Highest Angular Resolutions

A2 - Schilizzi, R. T.

ER -

Subparsec-scale HI in the nucleus of NGC 4151

Abstract

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