Physics
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.1963t&link_type=abstract
ATNF proposal V308, Semester: April, 2009
Physics
Extragalactic, Lba
Scientific paper
GHz-peaked spectrum (GPS) radio source (proposed to be the progenitors of FR-I and FR-II radio galaxies) samples have generally been selected in the past with a bias to objects with log(L W/Hz) > 24 at 5 GHz, relatively high luminosity objects. These high luminosity GPS sources are generally dominated by what appear to be the analogues of lobe hotspots in FR-II radio galaxies. Recently, two very nearby (and thus much lower luminosity) GPS sources have been found. Interestingly, these two GPS sources have no lobe hotspots and are dominated by jets. This raises the possiblity that there exists a luminosity/morphology relationship in the youngest radio galaxies, similar to that seen in FR-I and FR-II radio galaxies on much larger scales and for much older sources. We have defined a small sample of nearby, low luminosity GPS sources from the AT20G survey, for further study to investigate this possible relationship. We have detected these weak objects with e-VLBI observations and now propose full VLBI observations at higher angular resolution, to determine their morphologies.
Deller Adam
Hancock Paul
Phillips Chris
Sadler Elaine
Sokolova Yulia
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