NDLI: Constraining the Evolution of Young Radio-Loud AGN

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Constraining the Evolution of Young Radio-Loud AGN

Content Provider	Scilit
Author	Snellen, I. A. G. Mack, K. -H. Schilizzi, R. T. Tschager, W.
Copyright Year	2003
Description	GPS and CSS radio sources are the objects of choice to investigate the evolution of young radio-loud AGN. Previous investigations, mainly based on number counts and source size distributions, indicate that GPS/CSS sources decrease significantly in radio power when evolving into old, extended objects. We suggest this is preceded by a period of increase in radio luminosity, which lasts as long as the radio source is confined within the core-radius of its host galaxy. We have selected a sample of nearby compact radio sources, unbiased by radio spectrum, to determine their luminosity function, size distribution, dynamical ages, and emission line properties in a complete and homogeneous way. First results indicate that the large majority of objects (>80%) exhibit classical GPS/CSS radio spectra, and show structures consistent with them being compact double or compact symmetric objects. This sample provides an ideal basis to further test and constrain possible evolution scenarios, and to investigate the relation between radio spectra and morphologies, orientation and Doppler boosting in samples of young radio-loud AGN, in an unbiased way.
Related Links	https://www.cambridge.org/core/services/aop-cambridge-core/content/view/2FE3E5FF9B96F165E734242C383BAE2D/S1323358000007463a.pdf/div-class-title-constraining-the-evolution-of-young-radio-loud-agn-div.pdf
Ending Page	41
Page Count	4
Starting Page	38
ISSN	13233580
e-ISSN	14486083
DOI	10.1071/as02041
Journal	Publications of the Astronomical Society of Australia
Issue Number	1
Volume Number	20
Language	English
Publisher	Cambridge University Press (CUP)
Publisher Date	2003-01-01
Access Restriction	Open
Subject Keyword	Publications of the Astronomical Society of Australia Astronomy and Astrophysics Active Jets Galaxies
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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