Testing one-zone synchrotron-self-Compton models with spectral energy distributions of Mrk 421

Abstract

We test one-zone synchrotron self-Compton (SSC) models with high-quality multiwavelength spectral energy distribution (SED) data of Mrk 421. We use Markov chain Monte Carlo (MCMC) technique to fit twelve day-scale SEDs of Mrk 421 with one-zone SSC models. Three types of electron energy distribution (EED), a log-parabola (LP) EED, a power-law log-parabola (PLLP) EED and a broken power-law (BPL) EED, are assumed in fits. We find that the one-zone SSC model with the PLLP EED provides successful fits to all the twelve SEDs. However, the one-zone SSC model with the LP and BPL EEDs fail to provide acceptable fits to the highest energy X-ray data or GeV data in several states. We therefore conclude that the one-zone SSC model works well in explaining the SEDs of Mrk 421, and the PLLP EED is preferred over the LP and BPL EEDs for Mrk 421 during the flare in March 2010. We derive magnetic field $B^{\prime }\sim 0.01$\ G, Doppler factor ${\delta }_{\mathrm{D}}\sim$30--50, and the curvature parameter of EED $r\sim 1$--$10$ in the model with the PLLP EED. The evolutions of model parameters are explored. The physical implications of our results are discussed.

Accepted by MNRAS. We find that the PLLP EED is preferred over the LP and BPL EEDs for Mrk 421 during the flare in March 2010

References in corpus (8)

• Synchrotron Self-Compton Analysis of TeV X-ray Selected BL Lacertae Objects
• On the Momentum Diffusion of Radiating Ultrarelativistic Electrons in a Turbulent Magnetic Field
• X-ray spectral evolution of TeV BL Lac objects: eleven years of observations with BeppoSAX, XMM-Newton and SWIFT satellites
• Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
• Time-Dependent Stochastic Particle Acceleration in Astrophysical Plasmas: Exact Solutions Including Momentum-Dependent Escape
• Signatures of synchrotron emission and of electron acceleration in the X-ray spectra of Mrk 421
• Modeling the Multi-Wavelength Emission of Shell-Type Supernova Remnant RX J1713.7-3946
• Multi-frequency, Multi-Epoch Study of Mrk 501: Hints for a two-component nature of the emission

Cited by in corpus (4)

• On the origin of the hard X-Ray excess of high-synchrotron-peaked BL Lac object Mrk 421
• Constraints on the location of $\gamma$-ray emitting region for a sample of blazars with radio core-shift measurements
• Constraining the redshifts of TeV BL Lac objects
• On the TeV spectral energy distribution of HAWC's sources