Jet Properties and Evolution in Small and Intermediate Scale Objects - AstrophysicsReportar como inadecuado

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Abstract: Kinematic and spectral studies are improving our knowledge of the agedistribution in compact radio sources, providing evidence that small sourcesare generally very young. The properties of jets in objects spanning the sizerange from a few tens of parsecs to some kiloparsecs become then of particularinterest. Because of our selection criteria and of the small scales involved,the properties of jets in the population of Compact Symmetric Objects CSO arenot well known yet. Polarization properties seem to indicate a strong influenceby the interaction with the dense surrounding medium, and some objects showevidence of relativistic bulk motion. More evolved jets are present in theclass of Low Power Compact LPC sources and a number of cases are discussedhere. Since it is becoming increasingly clear that not all these sources willsurvive to evolve into large scale radio galaxies, the question of the finalevolution of the CSO and LPC population is also discussed, with examples ofcandidate dying sources.

Autor: M. Giroletti



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