Radio properties
Elliptical galaxies host a large variety of radio sources, from
the high-power (FR~II) radio sources to the jetty-looking FR~I
sources, and the weak nuclear sources that can be found in many
of the most normal-appearing elliptical galaxies (including one
radial velocity reference galaxy).
Many statistical studies of the radio properties of elliptical
galaxies have been done. My contribution to that work will
appear in
- Birkinshaw, M. & Davies, R.L., ApJ, under construction
- The radio morphological characteristics of elliptical galaxies
hosting low-power radio sources
Optical structures
The optical structures of elliptical galaxies show a wide range
of peculiarities, some associated with the kinematics of the
galaxies, some associated with the non-thermal nuclei, and some
which are just there.
A study of the properties of radio and non-radio elliptical galaxies
is currently entering the final phases of production, and will appear
in preprint form in the not-too-distant future as
- Davies, R.L. & Birkinshaw, M., ApJ, under construction
- The optical morphological characteristics of elliptical galaxies
hosting low-power radio sources
X-ray structures
Diana Worrall and I have recently shown that all low-power radio
galaxies (in our admittedly heterogeneous sample) display multiple
X-ray components. For details, see
- Birkinshaw, M. & Worrall, D.M., 1993. ApJ, 412, 568.
- The X-ray structure and spectrum of NGC~6251
- Worrall, D.M. & Birkinshaw, M., 1994. ApJ, in press (May 1994)
- Multiple X-ray components in low-power radio galaxies
Kinematics
For information on the work that I've been doing in collaboration
with Roger Davies and Ralf Bender on the stellar kinematics of radio
and other galaxies, please consult the reference below, and other
papers referred to within it, and watch this space for exciting new
data from the MMT!
- Davies, R.L. & Birkinshaw, M., ApJS, 68, 409, 1988
- The orientations of the
rotation axes of radio galaxies. II. Stellar rotation curves and
velocity dispersion profiles
Revised 27-Sep-1996 by
Mark Birkinshaw