J1216+0709: A Radio Galaxy With Three Episodes of Agn Jet Activity

Singh, Veeresh; Ishwara‐Chandra, C. H.; Kharb, P.; Srivastava, Shweta; Janardhan, P.

doi:10.3847/0004-637x/826/2/132

Cited by 16 publications

(10 citation statements)

References 39 publications

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“…They estimated this restarted phase to have an age of ∼ 10 4 yr. Thus, the three structures visible in the radio morphology on very different scales indicate at least three phases of recurrent radio activity, similar to other radio galaxies such as Centarus A, B2 0258+35, J1216+0709 and many others (Morganti et al 1999;Singh et al 2016;Kuźmicz et al 2017;Brienza et al 2018;McKinley et al 2018). On Xrays bands, data show a complex view of interactions between jetdriven radio outflows and the host galaxy environment, signalling feedback processes closely associated with the central absorbed active nucleus (Siemiginowska et al 2012;Sobolewska et al 2012).…”

supporting

confidence: 67%

Powerful ionized gas outflows in the interacting radio galaxy 4C+29.30

Couto

Storchi‐Bergmann

Siemiginowska

et al. 2020

Monthly Notices of the Royal Astronomical Society

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We investigate the ionized gas excitation and kinematics in the inner 4.3 × 6.2 kpc2 of the merger radio galaxy 4C +29.30. Using optical integral field spectroscopy with the Gemini North Telescope, we present flux distributions, line-ratio maps, peak velocities and velocity dispersion maps as well as channel maps with a spatial resolution of ≈955 pc. We observe high blueshifts of up to ∼−650 $\rm km\, s^{-1}$ in a region ∼1″ south of the nucleus (the southern knot – SK), which also presents high velocity dispersions (∼250 $\rm km\, s^{-1}$), which we attribute to an outflow. A possible redshifted counterpart is observed north from the nucleus (the northern knot – NK). We propose that these regions correspond to a bipolar outflow possibly due to the interaction of the radio jet with the ambient gas. We estimate a total ionized gas mass outflow rate of $\dot{M}_{out} = 25.4 \substack{+11.5 \\-7.5}\,$M⊙ yr−1with a kinetic power of $\dot{E} = 8.1 \substack{+10.7 \\-4.0} \times 10^{42}\,$erg s−1, which represents $5.8 \substack{+7.6 \\-2.9} \%$ of the AGN bolometric luminosity. These values are higher than usually observed in nearby active galaxies with the same bolometric luminosities and could imply a significant impact of the outflows in the evolution of the host galaxy. The excitation is higher in the NK – that correlates with extended X-ray emission, indicating the presence of hotter gas – than in the SK, supporting a scenario in which an obscuring dust lane is blocking part of the AGN radiation to reach the southern region of the galaxy.

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supporting

confidence: 67%

Powerful ionized gas outflows in the interacting radio galaxy 4C+29.30

Couto

Storchi‐Bergmann

Siemiginowska

et al. 2020

Monthly Notices of the Royal Astronomical Society

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“…They estimated this restarted phase to have an age of ∼ 10 4 yr. Thus, the three structures visible in the radio morphology on very different scales indicate at least three phases of recurrent radio activity, similar to other radio galaxies such as Centarus A, B2 0258+35, J1216+0709 and many others (Kuźmicz et al 2017;McKinley et al 2018;Morganti et al 1999;Brienza et al 2018;Singh et al 2016). On X-rays bands, data show a complex view of interactions between jet-driven radio outflows and the host galaxy environment, signaling feedback processes closely associated with the central absorbed active nucleus (Siemiginowska et al 2012;Sobolewska et al 2012).…”

Section: Introductionsupporting

confidence: 67%

Powerful ionized gas outflows in the interacting radio galaxy 4C +29.30

Couto,

Storchi-Bergmann,

Siemiginowska

et al. 2020

Preprint

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We investigate the ionized gas excitation and kinematics in the inner 4.3 × 6.2 kpc 2 of the merger radio galaxy 4C +29.30. Using optical integral field spectroscopy with the Gemini North Telescope, we present flux distributions, line-ratio maps, peak velocities and velocity dispersion maps as well as channel maps with a spatial resolution of ≈ 955 pc. We observe high blueshifts of up to ∼ −650 km s −1 in a region ∼ 1 south of the nucleus (the southern knot -SK), which also presents high velocity dispersions (∼ 250 km s −1 ), which we attribute to an outflow. A possible redshifted counterpart is observed north from the nucleus (the northern knot -NK). We propose that these regions correspond to a bipolar outflow possibly due to the interaction of the radio jet with the ambient gas. We estimate a total ionized gas mass outflow rate of M out = 25.4 +11.5 −7.5 M yr −1 with a kinetic power of E = 8.1 +10.7 −4.0 × 10 42 erg s −1 , which represents 5.8 +7.6 −2.9 % of the AGN bolometric luminosity. These values are higher than usually observed in nearby active galaxies with the same bolometric luminosities and could imply a significant impact of the outflows in the evolution of the host galaxy. The excitation is higher in the NK -that correlates with extended X-ray emission, indicating the presence of hotter gas -than in the SK, supporting a scenario in which an obscuring dust lane is blocking part of the AGN radiation to reach the southern region of the galaxy.

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“…With a typical expansion velocity of ∼0.1c (e.g., Tingay et al 1998;Arshakian & Longair 2004;Machalski et al 2010;An & Baan 2012), the active lobes would take 10 6 yr to grow to their typically observed dimensions (∼30-60 kpc Mezcua et al 2011Mezcua et al , 2012. This duration is comparable to the expected radiative lifetime of the relativistic plasma in the wings at decimeter or shorter wavelengths, once the energy supply to the wings has been cut off, following the putative spin-flip (Gopal-Krishna et al 1989;Komissarov & Gubanov 1994;Mocz et al 2011;Singh et al 2016). The consequent fading could easily push one or both radio wings below the detection threshold, unless imaged at a sufficiently low radio frequency.…”

Section: Discussionmentioning

confidence: 96%

Extended Catalog of Winged or X-shaped Radio Sources from the FIRST Survey

Yang

Joshi

Gopal-Krishna

et al. 2019

ApJS

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We present a catalog of 290 "winged" or X-shaped radio galaxies (XRGs) extracted from the latest (2014 December 17) data release of the "Very Large Array Faint Images of the Radio Sky at Twenty centimeter." We have combined these radio images with their counterparts in the TIFR GMRT sky survey at 150 MHz, in an attempt to identify any low surface brightness radio emission present in these sources. This has enabled us to assemble a sample of 106 "strong" XRG candidates and 184 "probable" XRG candidates whose XRG designation needs to be verified by further observations. The present sample of 290 XRG candidates is almost twice as large as the number of XRGs currently known. Twenty-five of our 290 XRG candidates (9 "strong" and 16 "probable") are identified as quasars. Doublepeaked narrow emission lines are seen in the optical spectra of three of the XRG candidates (two "strong" and one "probable"). Nearly 90% of the sample is located in the FR II domain of the Owen-Ledlow diagram. A few of the strong XRG candidates have a rather flat radio spectrum (spectral index α flatter than −0.3) between 150 MHz and 1.4 GHz, or between 1.4 and 5 GHz. Since this is not expected for lobe-dominated extragalactic radio sources (like nearly all known XRGs), these sources are particularly suited for follow-up radio imaging and near-simultaneous measurement of the radio spectrum.

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J1216+0709: A Radio Galaxy With Three Episodes of Agn Jet Activity

Cited by 16 publications

References 39 publications

Powerful ionized gas outflows in the interacting radio galaxy 4C+29.30

Powerful ionized gas outflows in the interacting radio galaxy 4C+29.30

Powerful ionized gas outflows in the interacting radio galaxy 4C +29.30

Extended Catalog of Winged or X-shaped Radio Sources from the FIRST Survey

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