e-VLBI observations of GHz-peaked spectrum radio sources in nearby galaxies from the AT20G survey
MetadataShow full item record
Gigahertz-peaked spectrum (GPS) radio sources are thought to be young objects which later evolve into Fanaro-Riley type I (FR I) and FR II radio galaxies. We have used the Australia Telescope 20 GHz (AT20G) survey catalogue to select a uniform sample of GPS sources with spectral peaks above 5 GHz, which should represent the youngest members of this class. In this paper, we present e-VLBI observations of 10 such objects which are associated with nearby(z< 0.15) galaxies and so represent a new population of local, low-power GPS sources. Oure-VLBI observations were carried out at 4.8 GHz with the Australia Telescope Long Baseline Array (LBA) using a real-time software correlator. All 10 sources were detected, and wereunresolved on scales of ~100 mas, implying that they are typically less than 100 pc in linear size
Showing items related by title, author, creator and subject.
Banfield, J.; Wong, O.; Willett, K.; Norris, R.; Rudnick, L.; Shabala, S.; Simmons, B.; Snyder, C.; Garon, A.; Seymour, Nick; Middelberg, E.; Andernach, H.; Lintott, C.; Jacob, K.; Kapinska, A.; Mao, M.; Masters, K.; Jarvis, M.; Schawinski, K.; Paget, E.; Simpson, R.; Klöckner, H.; Bamford, S.; Burchell, T.; Chow, K.; Cotter, G.; Fortson, L.; Heywood, I.; Jones, T.; Kaviraj, S.; López-Sánchez, R.; Maksym, W.; Polsterer, K.; Borden, K.; Hollow, R.; Whyte, L. (2015)We present results from the first 12 months of operation of Radio Galaxy Zoo, which upon completion will enable visual inspection of over 170 000 radio sources to determine the host galaxy of the radio emission and the ...
Sadler, E.; Ekers, Ronald; Mahony, E.; Mauch, T.; Murphy, T. (2014)We have made the first detailed study of the high-frequency radio-source population in the local Universe, using a sample of 202 radio sources from the Australia Telescope 20 GHz (AT20G) survey identified with galaxies ...
Mignano, A.; Prandoni, I.; Gregorini, L.; Parma, P.; De Ruiter, H.; Wieringa, M.; Vettolani, G.; Ekers, Ronald (2008)Context. One of the most debated issues about sub-mJy radio sources, which are responsible for the steepening of the 1.4 GHz source counts, is the origin of their radio emission. Particularly interesting, from, this point ...