Past, present and Future of the Scaling Relations of Galaxies and Active Galactic Nuclei

D’Onofrio, M.; Marziani, Paola; Chiosi, C.

doi:10.48550/arxiv.2109.06301

Cited by 2 publications

(2 citation statements)

References 772 publications

(1,116 reference statements)

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“…This situation might be changing soon with the development of integral-field spectrographs. Nonetheless, even when maximizing the coarse estimates reported above, it is unlikely that the thrust and the kinetic power (only ∼ 10 −2 the Eddington luminosity as derived for the [44,45] samples) might have a strong impact on the host galaxy's evolution and not to mention the possibility of driving the black hole mass-bulge correlation (e.g., and references therein [80]). Even if the [OIII]λ5007 samples only emission from mildly ionized gas and the mass flow might be dominated by the higher-ionization gas, for low luminosity AGNs such as the prototypical Population B Seyfert-1 NGC 5548, kinetic luminosity remains a very small fraction of the Eddington luminosity [37,81].…”

Section: Discussionmentioning

confidence: 97%

Isolating an Outflow Component in Single-Epoch Spectra of Quasars

2022

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Gaseous outflows appear to be a universal property of type-1 and type-2 active galactic nuclei (AGN). The main diagnostic is provided by emission features shifted to higher frequencies via the Doppler effect, implying that the emitting gas is moving toward the observer. However, beyond the presence of blueshift, the observational signatures of the outflows are often unclear, and no established criteria exist to isolate the outflow contribution in the integrated, single-epoch spectra of type-1 AGN. The emission spectrum collected the typical apertures of long-slit spectroscopy or of fiber optics sample contributions over a broad range of spatial scales, making it difficult to analyze the line profiles in terms of different kinematical components. Nevertheless, hundred of thousands of quasars spectra collected at moderate resolution demand a proper analysis of the line profiles for proper dynamical modeling of the emitting regions. In this small contribution, we analyze several profiles of the Hi Balmer line Hβ from composite and individual spectra of sources radiating at moderate Eddington ratio (Population B). Features and profile shapes that might be traced to outflow due to narrow-line region gas are detected over a wide range of luminosity.

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Section: Discussionmentioning

confidence: 97%

Isolating an Outflow Component in Single-Epoch Spectra of Quasars

2022

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“…As a first attempt, we assumed a column density N c = 10 23 cm −2 , solar metallicity, and 0 micro-turbulence. We focused on the exploration of the parameter ranges of the density n H (∼ 10 9−11 cm −3 ), and of BLR radius within the range expected from the Bentz et al [97] scaling law, corrected for high-accretion rates ( [98,99]; see also [100]). We utilized the SEDs from Laor et al [88] and Korista et al [89], which are most appropriate for bins A1 and B1, for RQ and RL separately (top panel of Fig.…”

Section: Photoionization Computationsmentioning

confidence: 99%

Optical singly-ionized iron emission in radio-quiet and relativistically jetted active galactic nuclei

Marziani¹,

Berton²,

Panda³

et al. 2021

Preprint

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The issue of the difference between optical and UV properties of radio-quiet and radio-loud (relativistically "jetted") active galactic nuclei (AGN) is a long standing one, related to the fundamental question of why a minority of powerful AGN possess strong radio emission due to relativistic ejections. This paper examines a particular aspect: the singly-ionized iron emission in the spectral range 4400 -5600 Å, where the prominent HI Hβ and [OIII]λλ4959,5007 lines are also observed. We present a detailed comparison of the relative intensity of FeII multiplets in the spectral types of the quasar main sequence where most jetted sources are found, and afterwards discuss radio-loud narrow-line Seyfert 1 (NLSy1) nuclei with γ-ray detection and with prominent FeII emission. An FeII template based on I Zw 1 provides an accurate representation of the optical FeII emission for RQ and, with some caveats, also for RL sources. CLOUDY photoionization simulations indicate that the observed spectral energy distribution can account for the modest FeII emission observed in composite radio-loud spectra. However, spectral energy differences alone cannot account for the stronger FeII emission observed in radio-quiet sources, for similar physical parameters. As for RL NLSy1s, they do not seem to behave like other RL sources, likely because of their different physical properties, that could be ultimately associated with a higher Eddington ratio.

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Past, present and Future of the Scaling Relations of Galaxies and Active Galactic Nuclei

Cited by 2 publications

References 772 publications

Isolating an Outflow Component in Single-Epoch Spectra of Quasars

Isolating an Outflow Component in Single-Epoch Spectra of Quasars

Optical singly-ionized iron emission in radio-quiet and relativistically jetted active galactic nuclei

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