Bibcode
Bettoni, D.; Falomo, R.; Fasano, G.; Govoni, F.; Salvo, M.; Scarpa, R.
Bibliographical reference
Astronomy and Astrophysics, v.380, p.471-477 (2001)
Advertised on:
12
2001
Journal
Citations
57
Refereed citations
45
Description
We collected photometrical and dynamical data for 73 low red-shift
(z<0.2) Radio Galaxies (LzRG) in order to study their Fundamental
Plane (FP). For 22 sources we also present new velocity dispersion data
that complement the photometric data given in our previous study of LzRG
(Govoni et al. cite{Govoni00}a). It is found that the FP of LzRG is
similar to the one defined by non-active elliptical galaxies, with LzRG
representing the brightest end of the population of early type galaxies.
Since the FP mainly reflects the virial equilibrium condition, our
result implies that the global properties of early-type galaxies
(defining the FP) are not influenced by the presence of gas accretion in
the central black hole. This is fully in agreement with the recent
results in black hole demography, showing that virtually all luminous
spheroidal galaxies host a massive black hole and therefore may
potentially become active. We confirm and extend to giant ellipticals
the systematic increase of the mass-to-light ratio with galaxy
luminosity. Based on observations collected at European Southern
Observatory, La Silla, Chile.