High Frequency Peakers

Abstract

There is quite a clear anticorrelation between the intrinsic peak frequency and the overall radio source size in Compact Steep Spectrum (CSS) and GHz Peaked Spectrum (GPS) radio sources as shown by O'Dea (1998). This feature is interpreted in terms of synchrotron self-absorption (although free-free absorption may play a role as well) of the radiation emitted by a small radio source which is growing within the inner region of the host galaxy. This leads to the hypothesis that these objects are young and that the radio source is still developing/expanding within the host galaxy itself. Very young radio sources must have the peak in their radio spectra occurring above a few tens of GHz, and for this reason they are termed High Frequency Peakers (HFPs). These newly born radio sources must be very rare given that they spend very little time in this stage.

11 pages, 3 figures. Accepted by Publications of the Astronomical Society of Australia (PASA), as part of the proceedings of the 3rd GPS/CSS Workshop, T. Tzioumis et al. (eds.) (see http://www.publish.csiro.au/journals/pasa/pip.cfm#v20n1)

References in corpus (3)

• Proper Motions in Compact Symmetric Objects
• Spectral Ages of CSOs and CSS Sources
• A New Test for the Absorption Mechanism of GPS Radio Sources Using Polarization Properties

Cited by in corpus (18)

• High Frequency Peakers: young radio sources or flaring blazars?
• Extended emission around GPS radio sources
• VLBA images of High Frequency Peakers
• Are young radio sources in equipartition?
• Constraining the nature of High Frequency Peakers. I. The spectral variability
• New candidate GHz Peaked Spectrum and Compact Steep Spectrum Sources
• HI 21-cm absorption and unified schemes of active galactic nuclei
• HI Absorption in High-Frequency Peaker Galaxies
• Hard X-ray selected giant radio galaxies -- II. Morphological evidence of restarted radio activity
• J0906+6930: a radio-loud quasar in the early Universe
• A discovery of young radio sources in the cores of giant radio galaxies selected at hard X-rays
• The parsec-scale structure of radio-loud broad absorption line quasars
• Constraining the nature of High Frequency Peakers. II. Polarization properties
• Radio spectrum evolution and magnetic field in extreme GPS radio sources. The case of RXJ1459+3337
• The Planck-ATCA Co-eval Observations (PACO) project: the spectrally-selected sample
• A compact symmetric radio source born at one-tenth the current age of the Universe
• Multi-frequency VLBA observations of compact sources from the Peacock & Wall catalogue
• The ATLAS 9.0 GHz Survey of the Extended Chandra Deep Field South: The Faint 9.0 GHz Radio Population