The Radio Structure of Compact Steep Spectrum Radio Sources

Fanti, C.; Fanti, R.; Parma, P.; Nan, R.; Schilizzi, R. T.; Spencer, R. E.; Breugel, W. J. M. van; Venturi, T.

doi:10.1007/978-94-009-2949-4_41

Cited by 146 publications

(230 citation statements)

References 7 publications

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“…Here we present evidence for both spatial and velocity offsets in 3C 186, a young (∼10 5 yr, Murgia et al 1999) RLAGN that belongs to the compact-steep spectrum class (Fanti et al 1985;O'Dea 1998). 3C 186 is located in a well-studied cluster of galaxies (Siemiginwska et al 2005;Siemiginowska et al 2010).…”

Section: Introductionmentioning

confidence: 51%

The puzzling case of the radio-loud QSO 3C 186: a gravitational wave recoiling black hole in a young radio source?

Chiaberge

Ely

Meyer

et al. 2017

A&A

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Context. Radio-loud active galactic nuclei with powerful relativistic jets are thought to be associated with rapidly spinning black holes (BHs). BH spin-up may result from a number of processes, including accretion of matter onto the BH itself, and catastrophic events such as BH-BH mergers. Aims. We study the intriguing properties of the powerful (L bol ∼ 10 47 erg s −1 ) radio-loud quasar 3C 186. This object shows peculiar features both in the images and in the spectra. Methods. We utilize near-IR Hubble Space Telescope (HST) images to study the properties of the host galaxy, and HST UV and Sloan Digital Sky Survey optical spectra to study the kinematics of the source. Chandra X-ray data are also used to better constrain the physical interpretation. Results. HST imaging shows that the active nucleus is offset by 1.3 ± 0.1 arcsec (i.e. ∼11 kpc) with respect to the center of the host galaxy. Spectroscopic data show that the broad emission lines are offset by −2140 ± 390 km s −1 with respect to the narrow lines. Velocity shifts are often seen in QSO spectra, in particular in high-ionization broad emission lines. The host galaxy of the quasar displays a distorted morphology with possible tidal features that are typical of the late stages of a galaxy merger. Conclusions. A number of scenarios can be envisaged to account for the observed features. While the presence of a peculiar outflow cannot be completely ruled out, all of the observed features are consistent with those expected if the QSO is associated with a gravitational wave (GW) recoiling BH. Future detailed studies of this object will allow us to confirm this type of scenario and will enable a better understanding of both the physics of BH-BH mergers and the phenomena associated with the emission of GW from astrophysical sources.

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Section: Introductionmentioning

confidence: 51%

The puzzling case of the radio-loud QSO 3C 186: a gravitational wave recoiling black hole in a young radio source?

Chiaberge

Ely

Meyer

et al. 2017

A&A

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“…Already Fanti et al (1990) showed that in quasars the average core fractional emission, f c = S core /S ext ∼ 0.05 ± 0.03, is not significantly different in CSSs (3CR/PW sample) and LSOs. Rossetti et al (2006) found that, for the B3-VLA galaxies, f c ∼ 0.006 as in LSOs.…”

Section: Morphology and Other Propertiesmentioning

confidence: 99%

“…2 (top), is well known since a while (e.g. Fanti et al 1990, O'Dea 1998). As the radio emission is due to synchrotron mechanism, synchrotron self-absorption (SSA) has to be present in small sources, and a similar anti-correlation is expected but between observed ν peak and angular size of the source components:…”

Section: Source Peak Spectral Frequency (ν Peak ) Vs Linear Size (Ls)mentioning

confidence: 99%

Radio properties of CSSs and GPSs

Fanti¹

2009

Astron Nachr

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“…This is particularly relevant in our field, where selection on spectra and morphology can be really confusing! The first studies on Compact Steep Spectrum (CSS) and Gigahertz Peaked Spectrum (GPS) sources were performed on the 3CR and the Peacock & Wall catalogues (Spencer et al 1989;Fanti et al 1990). The number of sources selected in the early days did not exceed a few dozens, and these sources were typically quite powerful.…”

Section: Introductionmentioning

confidence: 99%

Samples and statistics of CSS and GPS sources

Giroletti

Polatidis

2009

Astron Nachr

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The dates of receipt and acceptance should be inserted later Several samples have been proposed in the last years in order to study the properties of intrinsically small sources. In this paper, we review the properties of the main samples that are currently available, both selected on the basis of spectral index and of morphology. As a result of the work in this area, large numbers of intrinsically small sources have been found. We summarize the present status of hot spot advance measurements, listing 18 sources with available VLBI data. The mean hot spot separation velocity is vsep = (0.19 ± 0.11)h −1 c and the kinematic ages span the range from 20 to 3000 years. Finally, we present a brief outlook on the use of future instrumentation in order to improve our understanding of radio source evolution. Prospects for VSOP2, e-VLA, e-MERLIN, LOFAR, ALMA, and Fermi are suggested.

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The Radio Structure of Compact Steep Spectrum Radio Sources

Cited by 146 publications

References 7 publications

The puzzling case of the radio-loud QSO 3C 186: a gravitational wave recoiling black hole in a young radio source?

The puzzling case of the radio-loud QSO 3C 186: a gravitational wave recoiling black hole in a young radio source?

Radio properties of CSSs and GPSs

Samples and statistics of CSS and GPS sources

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