MUSE three-dimensional spectroscopy and kinematics of the gigahertz peaked spectrum radio galaxy PKS 1934–63: interaction, recently triggered active galactic nucleus and star formation

Roche, N.; Humphrey, A.; Lagos, P.; Papaderos, P.; Silva, Marckelson; Cardoso, Leandro S. M.; Gomes, J. M.

doi:10.1093/mnras/stw765

Cited by 15 publications

(19 citation statements)

References 68 publications

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“…(ix) The high temperatures that seem to characterize the low ionization gas of NGC 7212 might be explained by the jet-ISM interaction (Roche et al 2016). (x) The main peak of the lines outside the nucleus is shifted towards longer or shorter wavelengths, depending on the observed region.…”

Section: Discussionmentioning

confidence: 99%

High-resolution spectroscopy of the extended narrow-line region of IC 5063 and NGC 7212

Congiu

Contini

Ciroi

et al. 2017

Monthly Notices of the Royal Astronomical Society

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We studied the properties of the gas of the extended narrow line region (ENLR) of two Seyfert 2 galaxies: IC 5063 and NGC 7212. We analysed high resolution spectra to investigate how the main properties of this region depend on the gas velocity. We divided the emission lines in velocity bins and we calculated several line ratios. Diagnostic diagrams and SUMA composite models (photo-ionization + shocks), show that in both galaxies there might be evidence of shocks significantly contributing in the gas ionization at high |V |, even though photo-ionization from the active nucleus remains the main ionization mechanism. In IC 5063 the ionization parameter depends on V and its trend might be explained assuming an hollow bi-conical shape for the ENLR, with one of the edges aligned with the galaxy disk. On the other hand, NGC 7212 does not show any kind of dependence. The models show that solar O/H relative abundances reproduce the observed spectra in all the analysed regions. They also revealed an high fragmentation of the gas clouds, suggesting that the complex kinematics observed in these two objects might be caused by interaction between the ISM and high velocity components, such as jets.

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Section: Discussionmentioning

confidence: 99%

High-resolution spectroscopy of the extended narrow-line region of IC 5063 and NGC 7212

Congiu

Contini

Ciroi

et al. 2017

Monthly Notices of the Royal Astronomical Society

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“…Husemann et al 2013;Villar-Martín et al 2017) and powerful compact radio sources (e.g. Roche et al 2016), but it has been correctly proposed that the fast moving plasma itself can lead to radio emission that mimics jet activity Hwang et al 2018). In the case of HE 1353−1917 we can rule out that the ionised plasma is creating the radio emission because the high-velocity ionised gas traced by [O iii] is significantly displaced compared to the observed jet-like radio emission.…”

Section: The Powering Source Of the Multi-phase Gas Outflowmentioning

confidence: 99%

The Close AGN Reference Survey (CARS)

Husemann

Scharwächter

Davis

et al. 2019

A&A

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Context. Galaxy-wide outflows driven by star formation and/or an active galactic nucleus (AGN) are thought to play a crucial rule in the evolution of galaxies and the metal enrichment of the inter-galactic medium. Direct measurements of these processes are still scarce and new observations are needed to reveal the nature of outflows in the majority of the galaxy population. Aims. We combine extensive, spatially-resolved, multi-wavelength observations, taken as part of the Close AGN Reference Survey (CARS), for the edge-on disc galaxy HE 1353−1917 in order to characterise the impact of the AGN on its host galaxy via outflows and radiation. Methods. Multi-color broad-band photometry was combined with spatially-resolved optical, near-infrared (NIR) and sub-mm and radio observations taken with the Multi-Unit Spectroscopy Explorer (MUSE), the Near-infrared Integral Field Spectrometer (NIFS), the Atacama Large Millimeter Array (ALMA), and the Karl G. Jansky Very Large Array (VLA) to map the physical properties and kinematics of the multi-phase interstellar medium. Results. We detect a biconical extended narrow-line region ionised by the luminous AGN orientated nearly parallel to the galaxy disc, extending out to at least 25 kpc. The extra-planar gas originates from galactic fountains initiated by star formation processes in the disc, rather than an AGN outflow, as shown by the kinematics and the metallicity of the gas. Nevertheless, a fast, multi-phase, AGN-driven outflow with speeds up to 1000 km s−1 is detected close to the nucleus at 1 kpc distance. A radio jet, in connection with the AGN radiation field, is likely responsible for driving the outflow as confirmed by the energetics and the spatial alignment of the jet and multi-phase outflow. Evidence for negative AGN feedback suppressing the star formation rate (SFR) is mild and restricted to the central kpc. But while any SFR suppression must have happened recently, the outflow has the potential to greatly impact the future evolution of the galaxy disc due to its geometrical orientation. Conclusions.. Our observations reveal that low-power radio jets can play a major role in driving fast, multi-phase, galaxy-scale outflows even in radio-quiet AGN. Since the outflow energetics for HE 1353−1917 are consistent with literature, scaling relation of AGN-driven outflows the contribution of radio jets as the driving mechanisms still needs to be systematically explored.

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“…Conversely, set-up (iii) can be viewed as a conservative fitting approach in the situation of not having prior knowledge of the AGN optical continuum shape (e.g. Ho & Kim 2009;Roche et al 2016). Hereafter, these approaches are referred to as no power law (npl), single power law (spl), and multiple power laws (mpl).…”

Section: Application Of Population Synthesismentioning

confidence: 99%

Impact of an AGN featureless continuum on estimation of stellar population properties

Cardoso

Gomes

Papaderos

2017

A&A

Self Cite

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The effect of the featureless power-law (PL) continuum of an active galactic nucleus (AGN) on the estimation of physical properties of galaxies with optical population spectral synthesis (PSS) remains largely unknown. With the goal of a quantitative examination of this issue, we fit synthetic galaxy spectra representing a wide range of galaxy star formation histories (SFHs) and including distinct PL contributions of the form F ν ∝ ν −α with the PSS code Starlight to study to which extent various inferred quantities (e.g. stellar mass, mean age, and mean metallicity) match the input. The synthetic spectral energy distributions (SEDs) computed with our evolutionary spectral synthesis code include an AGN PL component with 0.5 ≤ α ≤ 2 and a fractional contribution 0.2 ≤ x AGN ≤ 0.8 to the monochromatic flux at 4020 Å. At the empirical AGN detection threshold x AGN 0.26 that we previously inferred in a pilot study on this subject, our results show that the neglect of a PL component in spectral fitting can lead to an overestimation by ∼2 dex in stellar mass and by up to ∼1 and ∼4 dex in the light-and mass-weighted mean stellar age, respectively, whereas the light-and mass-weighted mean stellar metallicity are underestimated by up to ∼0.3 and ∼0.6 dex, respectively. These biases, which become more severe with increasing x AGN , are essentially independent of the adopted SFH and show a complex behaviour with evolutionary time and α. Other fitting set-ups including either a single PL or multiple PLs in the base reveal, on average, much lower unsystematic uncertainties of the order of those typically found when fitting purely stellar SEDs with stellar templates, however, reaching locally up to ∼1, 3 and 0.4 dex in mass, age and metallicity, respectively. Our results underscore the importance of an accurate modelling of the AGN spectral contribution in PSS fits as a minimum requirement for the recovery of the physical and evolutionary properties of stellar populations in active galaxies. In particular, this study draws attention to the fact that the neglect of a PL in spectral modelling of these systems may lead to substantial overestimates in stellar mass and age, thereby leading to potentially significant biases in our understanding of the co-evolution of AGN with their galaxy hosts.

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MUSE three-dimensional spectroscopy and kinematics of the gigahertz peaked spectrum radio galaxy PKS 1934–63: interaction, recently triggered active galactic nucleus and star formation

Cited by 15 publications

References 68 publications

High-resolution spectroscopy of the extended narrow-line region of IC 5063 and NGC 7212

High-resolution spectroscopy of the extended narrow-line region of IC 5063 and NGC 7212

The Close AGN Reference Survey (CARS)

Impact of an AGN featureless continuum on estimation of stellar population properties

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