General physical properties of bright Fermi blazars

By G. Ghisellini, F. Tavecchio, Luigi Foschini, G. Ghirlanda, L. Maraschi, A. Observ., Sissa. 2009

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We studied all blazars of known redshift detected by the Fermi satellite during its first 3-month survey. For the majority of them, pointed Swift observations ensure a good multiwavelength coverage, enabling us to reliably construct their spectral energy distributions (SEDs). We model the SEDs using a one-zone leptonic model and study the distributions of the derived interesting physical parameters as a function of the observed γ-ray luminosity. We confirm previous findings concerning the relation of the physical parameters with source luminosity which are at the origin of the blazar sequence. The SEDs allow to estimate the luminosity of the accretion disc for the majority of broad emitting line blazars, while for the lineless BL Lac objects in the sample upper limits can be derived. We find a positive correlation between the jet power and the luminosity of the accretion disc in broad-line blazars. In these objects, we argue that the jet must be proton dominated, and that the total jet power is of the same order of (or slightly larger than) the disc luminosity. We discuss two alternative scenarios to explain this result.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4945530d186b301300399b3872f693bcc2681d04

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Citations in the corpus

BAT AGN Spectroscopic Survey. V. X-Ray Properties of the Swift/BAT 70-month AGN Catalog (2017, result): “As seen in many previous studies, among the blazars the Flat Spectrum Radio Quasars are significantly more luminous than the BL Lacs (e.g., Fossati et al. 1998; Ghisellini et al. 2010).”
Mechanical feedback from active galactic nuclei in galaxies, groups and clusters (2012, background): “A mechanism able to access the rotational energy of a SMBH efficiently and at low accretion rates, i.e. Pjet > Ṁc2, may be needed to sustain the most powerful AGN (McNamara et al 2009, 2011, Ghisellini et al 2010, Fernandes et al 2011, Punsly 2011).”
Efficient Generation of Jets from Magnetically Arrested Accretion on a Rapidly Spinning Black Hole (2011, background): “Thus, taken at face value, any robust observation of η > 100 per cent in an AGN implies that the Penrose/BZ process must be operating.”
RADIO-LOUD NARROW-LINE SEYFERT 1 AS A NEW CLASS OF GAMMA-RAY ACTIVE GALACTIC NUCLEI (2009, background): “Anyway, when comparing the calculated powers with the distribution of powers in blazars (quasars plus BL Lacs; see Ghisellini et al. 2009b), RL-NLS1s are in the average range.”
THE SPECTRAL ENERGY DISTRIBUTIONS OF FERMI BLAZARS (2016, unknown): “…2015; Ackermann et al. 2011a,b, 2015; Aller et al. 2011; Bai, et al. 1998; Bastieri et al. 2011; Chen et al., 2012; Fan & Xie 1996; Fan et al. 2011; Ghisellini et al. 2010; Gu 2014; Gu & Li 2013; Gupta 2011; Gupta et al. 2012; Hu, et al. 2006; Marscher et al. 2011; Nolan et al. 2012; Romero et…”
Properties of flat-spectrum radio-loud Narrow-Line Seyfert 1 Galaxies (2014, methodology): “These values were calculated from the samples of γ−ray blazars from Ghisellini et al. (2009, 2010) and Tavecchio et al. (2010) and radio-quiet Seyferts from Grupe et al. (2010).”
The transition between BL Lac objects and flat spectrum radio quasars (2010, methodology): “Instead, when the accretion disk emission dominates, the estimate of the black hole mass is much less uncertain (see the discussion in G10 and Ghisellini et al. 2010b).”
BLAZARS AS ULTRA-HIGH-ENERGY COSMIC-RAY SOURCES: IMPLICATIONS FOR TeV GAMMA-RAY OBSERVATIONS (2011, methodology): “In Ghisellini et al. (2010), physical parameters were obtained via spectral modeling using their one-zone leptonic model of all blazars with known redshift detected by theF rmi satellite during its first 3-month survey.”
LEPTONIC AND HADRONIC MODELING OF FERMI-DETECTED BLAZARS (2013, background): “Steady-state leptonic models have met with great success in modeling the SEDs of all classes of blazars (e.g., Ghisellini et al. 1998; Celotti & Ghisellini 2008), including substantial samples of Fermi-detected blazars (e.g., Ghisellini et al. 2010).”
The Blazar TXS 0506+056 Associated with a High-energy Neutrino: Insights into Extragalactic Jets and Cosmic-Ray Acceleration (2018, background): “These values are somewhat larger than that derived for BL Lac objects through purely leptonic models that do not account for accelerated protons (Ghisellini et al. 2009).”