The Energy Budget in the Jet of High-frequency Peaked BL Lacertae Objects

Abstract

Energy equipartition and the energy budget in the jet are import issues for the radiation mechanism of blazars. Early work predominantly concentrated on flat-spectrum radio quasars and a limited number of BL Lacertae objects (BL Lacs). In this paper, we compile 348 high-frequency peaked BL Lac objects (HBLs) based on the catalog of active galactic nuclei (4LAC-DR3) from Fermi-LAT, and employ \textit{JetSet} to fit the spectral energy distributions (SEDs) of these HBLs in the framework of the one-zone lepton model. We aim to determine whether the energy budget is reasonable and whether the energy equipartition is satisfied in HBLs. The results of the statistical analysis suggest that: (1) SEDs of HBLs can be reproduced well by using the one-zone lepton model; however it cannot achieve the energy equalization, and the relativistic electron energy density is far greater than the magnetic field energy density, $U_e\gtrsim 100U_B$; (2) the majority of the HBLs are located in the $t_{cool}$$<$$t_{dyn}$ region (where the horizontal coordinate represents the jet power of electrons, while the ordinate indicates the ratio between the dynamic time scale to the cooling timescale), and the jet kinetic power of HBLs is greater than the jet power of radiation; there is a very low radiation efficiency, we deduce that HBLs may have optically thin advection-dominated accretion flows; (3) the $\log {\epsilon }_B$ of HBLs is less than zero, which indicates that the jet kinetic power of HBLs is not affected by Poynting flux; (4) the relationships with $U_e>U_{Syn}\sim U_B$, $L_e\sim L_p>L_B\sim L_{rad}$ and $\log {\epsilon }_e>0.5$ are established. These relations indicate that most of the energy of HBLs is stored in the population of low-energy electrons.

arXiv comment20 pages, 11 figures, and 5 tables

References in corpus (66)

• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The SIMBAD astronomical database
• Advection-Dominated Accretion: A Self-Similar Solution
• Advection-Dominated Accretion: Underfed Black Holes and Neutron Stars
• Fermi Large Area Telescope Fourth Source Catalog
• Fermi Large Area Telescope First Source Catalog
• The Spectral Energy Distribution of Fermi bright blazars
• A theoretical unifying scheme for gamma-ray bright blazars
• Leptonic and Hadronic Modeling of Fermi-Detected Blazars
• The Connection between X-ray- and Radio-Selected BL Lacertae Objects
• General physical properties of bright Fermi blazars
• Incremental Fermi Large Area Telescope Fourth Source Catalog
• Fermi Large Area Telescope Bright Gamma-ray Source List
• Constraints on the Physical Parameters of TeV Blazars
• The power of relativistic jets is larger than the luminosity of their accretion disks
• Log-parabolic spectra and particle acceleration in the BL Lac object Mkn 421: spectral analysis of the complete BeppoSAX wide band X-ray data set
• Relativistic Jets Shine through Shocks or Magnetic Reconnection?
• Swift observations of the very intense flaring activity of Mrk 421 during 2006: I. Phenomenological picture of electron acceleration and predictions for the MeV/GeV emission
• X-ray Emission from Extragalactic Jets
• Stochastic Acceleration and the Evolution of Spectral Distributions in SSC Sources: A Self Consistent Modeling of Blazars' Flares
• TeV BL Lac objects at the dawn of the Fermi era
• The Jet-Disk Connection and Blazar Unification
• Log-parabolic spectra and particle acceleration in blazars. III: SSC emission in the TeV band from Mkn 501
• Constraining the location of the emitting region in Fermi blazars through rapid gamma-ray variability
• The Spectral Energy Distributions of Fermi Blazars
• Possible Evidence for Truncated Thin Disks in the Low-Luminosity Active Galactic Nuclei M81 and NGC 4579
• Radiation Mechanisms and Physical Properties of GeV-TeV BL Lac Objects
• The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope -- Data Release 3
• Evaporation of accretion disks around black holes: the disk-corona transition and the connection to the advection-dominated accretion flow
• Double-Peaked Broad Emission Lines in NGC 4450 and Other LINERs
• Log-parabolic spectra and particle acceleration in blazars - II: The BeppoSAX wide band X-ray spectra of Mkn 501
• Equipartition Gamma-Ray Blazars and the Location of the Gamma-Ray Emission Site in 3C 279
• The Central Engines of Fermi Blazars
• Three-Layered Atmospheric Structure in Accretion Disks Around Stellar-Mass Black Holes
• The brightest gamma-ray flares of blazars
• Core shifts, magnetic fields and magnetization of extragalactic jets
• General Physical Properties of CGRaBS Blazars
• Constraints on minimum electron Lorentz factor and matter content of jets for a sample of bright Fermi blazars
• On the magnetization of BL Lac jets
• Jet formation in BL Lacertae objects with different accretion modes
• The Accretion Rates and Spectral Energy Distributions of BL Lacertae Objects
• Discerning the $\gamma$-ray emitting region in the flat spectrum radio quasars
• The physical properties of $Fermi$-4LAC flat spectrum radio quasars
• Evidence for the evolutionary sequence of blazars: different types of accretion flows in BL Lac objects
• Electron positron pairs in blazar jets and gamma-ray loud radio-galaxies
• The Central Engines of Radio-Loud Quasars
• The Open Universe VOU-Blazars tool
• Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019
• On the magnetisation and the radiative efficiency of BL Lac jets
• X-ray Flux and Spectral Variability of Six TeV Blazars with \textit{NuSTAR}
• The Intrinsic Properties of Multiwavelength Energy Spectra for Fermi Teraelectronvolt Blazars
• A Steady-State Spectral Model For Electron Acceleration And Cooling In Blazar Jets: Application To 3C 279
• Particle acceleration and synchrotron self-Compton emission in blazar jets I : an application to the quiescent emission
• Electron Acceleration in Pulsar-Wind Termination Shocks: An Application to the Crab Nebula Gamma-Ray Flares
• Verification of the diffusive shock acceleration in Mrk 501
• Long term multi-wavelength view of the blazar 1ES 1218+304
• A time-dependent particle acceleration and emission model: Understanding the particle spectral evolution and blazar flares
• Searching for TeV Candidates in 4LAC High-synchrotron-peaked Frequency BL Lac Objects
• Rapid X-ray Variability in Mkn 421 during a Multiwavelength Campaign
• The Physical Properties of Changing-look Blazars
• Do radiative losses determine the characteristic emission of the blazar Mkn 421?

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