BLAZAR SPECTRAL PROPERTIES AT 74 MHz
Massaro F, Giroletti M, Paggi A, D'Abrusco R, Tosti G, Funk S (2013)
Publication Type: Journal article
Publication year: 2013
Journal
Book Volume: 208
Journal Issue: 2
DOI: 10.1088/0067-0049/208/2/15
Abstract
Blazars are the most extreme class of active galactic nuclei. Despite a previous investigation at 102 MHz for a small sample of BL Lac objects and our recent analysis of blazars detected in the Westerbork Northern Sky Survey, a systematic study of the blazar spectral properties at frequencies below 100 MHz has been never carried out. In this paper, we present the first analysis of the radio spectral behavior of blazars based on the recent Very Large Array Low-frequency Sky Survey (VLSS) at 74 MHz. We search for blazar counterparts in the VLSS catalog, confirming that they are detected at 74 MHz. We then show that blazars present radio-flat spectra (i.e., radio spectral indices of similar to 0.5) when evaluated, which also about an order of magnitude in frequency lower than previous analyses. Finally, we discuss the implications of our findings in the context of the blazars-radio galaxies connection since the low-frequency radio data provide a new diagnostic tool to verify the expectations of the unification scenario for radio-loud active galaxies.
Authors with CRIS profile
Involved external institutions
Stanford National Accelerator Laboratory (SLAC)
United States (USA) (US)
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
Italy (IT)
Harvard University
United States (USA) (US)
Università degli Studi di Perugia
Italy (IT)
United States (USA) (US)
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
Italy (IT)
Harvard University
United States (USA) (US)
Università degli Studi di Perugia
Italy (IT)
How to cite
APA:
Massaro, F., Giroletti, M., Paggi, A., D'Abrusco, R., Tosti, G., & Funk, S. (2013). BLAZAR SPECTRAL PROPERTIES AT 74 MHz. Astrophysical Journal Supplement Series, 208(2). https://doi.org/10.1088/0067-0049/208/2/15
MLA:
Massaro, Francesco, et al. "BLAZAR SPECTRAL PROPERTIES AT 74 MHz." Astrophysical Journal Supplement Series 208.2 (2013).
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