NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-25 T19:53:24 PDT
Help | Comment | NED Home

For refcode 1989AJ.....97.1319C:
Retrieve 741 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1989AJ.....97.1319C ON THE RELATIONSHIP BETWEEN RADIO EMISSION AND OPTICAL PROPERTIES IN EARLY-TYPE GALAXIES MASSIMO CALVANI International School for Advanced Studies, Trieste, Italy GIOVANNI FASANO Padova Astronomical Observatory, Padova, Italy ALBERTO FRANCESCHINI Department of Astronomy, University of Padova, Italy Received 10 August 1988, revised 17 January 1989 ABSTRACT To improve our understanding of the origin of radio activity in early-type galaxies, we explore possible dependence of their radio emission on basic optical parameters, such as the absolute magnitude M_B_, the central velocity dispersion {sigma}, and the mean surface brightness {mu}. We use a sample of 743 E and S0 galaxies based on three independent radio surveys of optically selected galaxies with virtually complete information on magnitudes, morphological types, redshift distances, diameters, and radio fluxes (data on {sigma} are available for a limited number of objects). We find that for both E and S0 galaxies only the absolute magnitude appears to be directly related to the radio activity, while {sigma} and {mu} do not. Also, a significant dependence of the apparent flattening on radio power is confirmed for E galaxies. Some relevant implications of these results are discussed.
Retrieve 741 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home