Spectral Energy Distribution Modeling of BL Lacertae During a Large Submillimeter Outburst and Low X-Ray Polarization State
arXiv:2411.16249 · doi:10.3847/1538-4357/ad9603
Abstract
In 2023 October-November, the blazar BL Lacertae underwent a very large-amplitude submm outburst. The usual single-zone leptonic model with the lower energy peak of the spectral energy distribution (SED) fit by the synchrotron emission from one distribution of relativistic electrons in the jet and inverse-Compton (IC) scattering of lower energy photons from the synchrotron radiation in the jet itself (synchrotron self-Compton or SSC) or those from the broad line region and torus by the same distribution of electrons cannot satisfactorily fit the broadband SED with simultaneous data at submm--optical--X-ray--GeV energies. Furthermore, simultaneous observations with IXPE indicate the X-ray polarization is undetected. We consider two different synchrotron components, one for the high flux in the submm wavelengths and another for the data at the optical band, which are supposedly due to two separate distributions of electrons. In that case, the optical emission is dominated by the synchrotron radiation from one electron distribution while the X-rays are mostly due to SSC process by another, which may result in low polarization fraction due to the IC scattering. We show that such a model can fit the broadband SED satisfactorily as well as explain the low polarization fraction at the X-rays.
arXiv commentAccepted for publication in Astrophysical Journal (ApJ) on November 14, 2024, 13 pages with 4 figures and 6 tables
References in corpus (60)
- Astropy: A Community Python Package for Astronomy
- Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
- Unified Schemes for Radio-Loud Active Galactic Nuclei
- Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
- The Swift X-ray Telescope
- The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
- The Swift Ultra-Violet/Optical Telescope
- Methods and results of an automatic analysis of a complete sample of Swift-XRT observations of GRBs
- A Unifying View of the Spectral Energy Distributions of Blazars
- The Spectral Energy Distribution of Fermi bright blazars
- Leptonic and Hadronic Modeling of Fermi-Detected Blazars
- The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
- The Submillimeter Array
- Incremental Fermi Large Area Telescope Fourth Source Catalog
- Turbulent, Extreme Multi-Zone Model for Simulating Flux and Polarization Variability in Blazars
- Canonical high power blazars
- Reverberation Mapping of High-Luminosity Quasars: First Results
- A Proton Synchrotron Blazar Model for Flaring in Markarian~501
- Comptonization of Infrared Radiation from Hot Dust by Relativistic Jets in Quasars
- The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
- Fermi-LAT Observations of Markarian 421: the Missing Piece of its Spectral Energy Distribution
- MOJAVE: XV. VLBA 15 GHz Total Intensity and Polarization Maps of 437 Parsec-Scale AGN Jets From 1996-2017
- 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
- Minute-Timescale >100 MeV gamma-ray variability during the giant outburst of quasar 3C 279 observed by Fermi-LAT in 2015 June
- Stochastic Acceleration and the Evolution of Spectral Distributions in SSC Sources: A Self Consistent Modeling of Blazars' Flares
- Jet opening angles and gamma-ray brightness of AGN
- Gamma-Ray Studies of Blazars: Synchro-Compton Analysis of Flat Spectrum Radio Quasars
- MOJAVE - XIV. Shapes and opening angles of AGN jets
- Multiwaveband Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Correlated Polarization Behavior
- Spitzer Observations of 3C Quasars and Radio Galaxies: Mid-Infrared Properties of Powerful Radio Sources
- Polarized Blazar X-rays imply particle acceleration in shocks
- The awakening of BL Lacertae: observations by Fermi, Swift, and the GASP-WEBT
- Long-term optical monitoring of TeV emitting Blazars
- The X-ray Polarization View of Mrk~421 in an Average Flux State as Observed by the Imaging X-ray Polarimetry Explorer
- Observations of a Correlated Gamma-Ray and Optical Flare for BL Lacertae
- The Polarization Properties of Inverse Compton Emission and Implications for Blazar Observations with the GEMS X-Ray Polarimeter
- X-ray Observations of BL Lacertae During 1997 Outburst and its Association with Quasar-like Characteristics
- Gamma-ray Blazars Within the First 2 Billion Years
- Synchrotron and inverse-Compton emission from blazar jets I: a uniform conical jet model
- Analyzing the Multiwavelength Spectrum and Variability of BL Lacertae During the July 1997 Outburst
- High redshift Fermi blazars
- The first Fermi multifrequency campaign on BL Lacertae: characterizing the low-activity state of the eponymous blazar
- Synchrotron and Synchrotron Self-Compton Spectral Signatures and Blazar Emission Models
- X-ray Polarization of BL Lacertae in Outburst
- Long-term optical polarization variability and multiwavelength analysis of Blazar Mrk 421
- X-ray Polarization Observations of BL Lacertae
- The nature of optical and near-infrared variability of BL Lacertae
- A Fast Very High Energy -ray Flare from BL Lacertae during a Period of Multiwavelength activity in June 2015
- Is BL Lacertae an "orphan" AGN? Multiband and spectroscopic constraints on the parent population
- The Polarization Behavior of Relativistic Synchrotron Self-Compton Jets
- IXPE observation of PKS 2155-304 reveals the most highly polarized blazar
- Modeling the Multiwavelength Spectra and Variability of BL Lacertae in 2000
- A thirteen-year-long broadband view of BL Lac
- Prospects for Detecting X-ray Polarization in Blazar Jets
- Multiwavelength Study of High-Redshift Blazars
- 3C 279 in Outburst in June 2015: A Broadband-SED Study Based on the INTEGRAL Detection
- Intra-night optical flux and polarization variability of BL~Lacertae during its 2020 2021 high state
- Optical polarization variations in the blazar PKS 1749+096
- Extremely high polarization in 2010 outburst of blazar 3C 454.3
- XMM-NuSTAR Observation and Multiwavelength SED Modeling of Blazar 4FGL J1520.8-0348