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A Possible Fundamental Difference Between Radio Loud and Radio Quiet AGN

Published online by Cambridge University Press:  25 May 2016

M. Calvani ,
J.W. Sulentic ,
P. Marziani ,
D. Dultzin-Hacyan  and
M. Moles
M. Calvani
Affiliation:
Osservatorio Astronomico, Padova, Italia University of Alabama, Tuscaloosa, USA Instituto de Astronomía, UNAM, México Instituto de Astrofisica de Andalucia, Granada, España
J.W. Sulentic
Affiliation:
Osservatorio Astronomico, Padova, Italia University of Alabama, Tuscaloosa, USA Instituto de Astronomía, UNAM, México Instituto de Astrofisica de Andalucia, Granada, España
P. Marziani
Affiliation:
Osservatorio Astronomico, Padova, Italia University of Alabama, Tuscaloosa, USA Instituto de Astronomía, UNAM, México Instituto de Astrofisica de Andalucia, Granada, España
D. Dultzin-Hacyan
Affiliation:
Osservatorio Astronomico, Padova, Italia University of Alabama, Tuscaloosa, USA Instituto de Astronomía, UNAM, México Instituto de Astrofisica de Andalucia, Granada, España
M. Moles
Affiliation:
Osservatorio Astronomico, Padova, Italia University of Alabama, Tuscaloosa, USA Instituto de Astronomía, UNAM, México Instituto de Astrofisica de Andalucia, Granada, España

Extract

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We report on some striking differences between radio loud and quiet emitters that we found in a comparative analysis of the high and low ionization lines for 52 low redshift AGN (31 loud; 21 quiet).

The broad components of Civλ1549 and Hβ were chosen as representative of the high and low ionization lines respectively. CIVλ1549 observations were obtained with the Faint Object Spectrograph on the HST. They were retrieved from the HST data archive and matching optical spectra for the region of Hβ were obtained at several ground based observatories. Details on observations, narrow/broad component deconvolution and profile cleaning from satellite lines (especially FeII) can be found in Marziani et al. (1995). The rest frame for each quasar was determined from the radial velocity of strong narrow lines, typically [Oiii]λλ4959,5007.

Type
Relation between Radio and Other Wavelenghts
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 250 - 251
Copyright
Copyright © Kluwer 1996 

References

Marziani, P., Sulentic, J.W., Dultzin-Hacyan, D., Calvani, M. and Moles, M. (1995), Ap. J. Suppl. , in press.Google Scholar