Physics
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop.1049t&link_type=abstract
ATNF proposal V251, Semester: October, 2007
Physics
Extragalactic, Lba
Scientific paper
GHz-peaked spectrum (GPS) radio sources (proposed to be the progenitors of FR-I and FR-II radio galaxies) have generally been selected in the past biased 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 chose to use the new e-VLBI capability of the LBA for these observations, since the capability is well suited to our observational goals.
Deller Adam
Hancock Paul
Phillips Chris
Sadler Elaine
Tingay Steven
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