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VLBA Observations of Bright High Frequency Peakers

Published online by Cambridge University Press:  05 March 2013

Sara Tinti ,
Daniele Dallacasa ,
Carlo Stanghellini  and
Annalisa Celotti
Sara Tinti
Affiliation:
SISSA/ISAS, Via Beirut 4, Trieste, Italy, 34014. tinti@sissa.itcelotti@sissa.it
Daniele Dallacasa
Affiliation:
Dipartimento di Astronomia, Università di Bologna, via Ranzani 1, Bologna, Italy, 40127. Istituto di Radioastronomia-CNR, Via Gobetti 101, Bologna, Italy, 40100.ddallaca@ira.cnr.it
Carlo Stanghellini
Affiliation:
Istituto di Radioastronomia-CNR, C.P. 161, Noto, Italy, 96017. cstan@ira.cnr.it
Annalisa Celotti
Affiliation:
SISSA/ISAS, Via Beirut 4, Trieste, Italy, 34014. tinti@sissa.itcelotti@sissa.it
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Abstract

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The anticorrelation between the turnover frequency in the radio spectrum and the projected linear size (indicative of the age in the currently favoured youth model) in powerful and intrinsically compact radio sources suggests that the youngest objects must have the highest turnover frequencies. We present preliminary results of new VLBA observations of a sample of sources peaking at frequencies higher than a few GHz, making them good candidates for being newly born sources. Our initial analysis deals with the morphological classification which allows us to study the contamination from beamed sources dominated by a single unresolved component.

Keywords

galaxies: activequasars: generalradio continuum: galaxies
Type
GPS/CSS Workshop
Information
Publications of the Astronomical Society of Australia , Volume 20 , Issue 1 , 2003 , pp. 110 - 112
Copyright
Copyright © Astronomical Society of Australia 2003

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