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Circumnuclear Dynamics in Mrk 273 and Mrk 231

Published online by Cambridge University Press:  13 May 2016

A. M. S. Richards ,
R.J. Cohen ,
G.H. Cole ,
A.J. Holloway ,
A. Pedlar ,
J.L. Collett ,
J.H. Knapen ,
J.A. Yates ,
D. Field  and
M.D. Gray
...Show all authors
A. M. S. Richards
Affiliation:
JBO, University of Manchester, Cheshire, SK11 9DL, UK
R.J. Cohen
Affiliation:
JBO, University of Manchester, Cheshire, SK11 9DL, UK
G.H. Cole
Affiliation:
JBO, University of Manchester, Cheshire, SK11 9DL, UK
A.J. Holloway
Affiliation:
JBO, University of Manchester, Cheshire, SK11 9DL, UK
A. Pedlar
Affiliation:
JBO, University of Manchester, Cheshire, SK11 9DL, UK
J.L. Collett
Affiliation:
Dept. of Physical Sciences, University of Hertfordshire, AL10 9AB, UK
J.H. Knapen
Affiliation:
Dept. of Physical Sciences, University of Hertfordshire, AL10 9AB, UK
J.A. Yates
Affiliation:
Dept. of Physical Sciences, University of Hertfordshire, AL10 9AB, UK
D. Field
Affiliation:
Institute of Physics and Astronomy, University of Aarhus, Denmark
M.D. Gray
Affiliation:
Dept. of Physics, UMIST, PO Box 88, Manchester M60 1LD, UK
C.G. Mundell
Affiliation:
ARI, Liverpool John Moores University, Birkenhead, CH41 1LD, UK
M.M. Wright
Affiliation:
School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK

Abstract

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Markarian 273 and Markarian 231 are ultra-luminous IR galaxies which show signs of merger activity. Their radio continuum and spectral line emission has been imaged on scales of tens of parsec using MERLIN. Mrk 273 and Mrk 231 are classed as Seyfert types 2 and 1 respectively. The distribution and velocity gradients shown by OH masers and HI absorption are consistent with material in a rotating disk or ring, with the axis at greater than 45° to the line of sight in Mrk 273, and at less than 45° to the line of sight in Mrk 231. We estimate the amount of mass enclosed and infer its distribution from irregularities in the maser morphologies and comparison with HI and radio continuum data.

Type
The Inner Regions of Galaxies
Information
Symposium - International Astronomical Union , Volume 205: Galaxies and their Constituents at the Highest Angular Resolutions , 2001 , pp. 212 - 215
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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