Exploring the Emission Mechanisms of Mrk 180 with long term X-ray and $\gamma$-ray data

Abstract

Markarian (Mrk) 180 is a BL Lacertae (BL Lac) object located at a redshift of 0.045 and a potential candidate for high-energy cosmic ray acceleration. We have analyzed the Fermi Large Area Telescope (\textit{Fermi}-LAT) $\gamma$-ray data of Mrk 180 collected over a period of 12.8 years and found no significant enhancement in the flux from the long-term $\gamma$-ray light curve. We have also analyzed Swift X-ray, ultraviolet \& optical, and X-ray Multi-Mirror Mission (XMM-Newton) data to construct the multi-wavelength spectral energy distribution (SED). The SED has been modeled with one-zone pure leptonic and lepto-hadronic scenarios to explain the underlying physics of multi-wavelength emission. The pure leptonic model and the two lepto-hadronic models, viz., (i) line-of-sight interactions of ultrahigh-energy cosmic rays (UHECR; $E\gtrsim 10^{17}$ eV) with the cosmic background radiation and (ii) the interactions of relativistic protons with the cold protons in the jet, have been compared in our work. Moreover, an earlier study has associated Mrk 180 with the Telescope Array (TA) hotspot of UHECRs at $E>57$ EeV. This speculation motivates us to check whether ultrahigh energy protons and iron nuclei can reach the earth from Mrk 180. After comparing the results of our simulation with the current observational data, we find that Mrk 180 is unlikely to be a source of the UHECR events contributing to the TA hotspot for conservative strengths of extragalactic magnetic fields.

arXiv comment12 pages, 4 figures, 1 table; Accepted for publication in ApJ

References in corpus (31)

• A Brief Introduction to PYTHIA 8.1
• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• Correcting for the Effects of Interstellar Extinction
• The Swift X-ray Telescope
• HI4PI: A full-sky HI survey based on EBHIS and GASS
• Relativistic Jets in Active Galactic Nuclei
• A New Model of the Galactic Magnetic Field
• Semi-analytic modeling of the EBL and consequences for extragalactic gamma-ray spectra
• TeV Gamma Rays from BL Lac Objects due to Synchrotron Radiation of Extremely High Energy Protons
• Development of the Model of Galactic Interstellar Emission for Standard Point-Source Analysis of Fermi Large Area Telescope Data
• 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
• Parametrization of gamma-ray production cross-sections for pp interactions in a broad proton energy range from the kinematic threshold to PeV energies
• Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array Experiment
• CRPropa 3 - a Public Astrophysical Simulation Framework for Propagating Extraterrestrial Ultra-High Energy Particles
• MOJAVE: XV. VLBA 15 GHz Total Intensity and Polarization Maps of 437 Parsec-Scale AGN Jets From 1996-2017
• Jet opening angles and gamma-ray brightness of AGN
• A new estimate of the extragalactic radio background and implications for ultra-high-energy gamma-ray propagation
• A new interpretation of the gamma-ray observations of active galactic nuclei
• Secondary photons and neutrinos from cosmic rays produced by distant blazars
• Long-term optical monitoring of TeV emitting Blazars
• CRPropa 3.2 -- an advanced framework for high-energy particle propagation in extragalactic and galactic spaces
• Discovery of Very High Energy $\gamma$-Rays from Markarian~180 Triggered by an Optical Outburst
• Leptonic and Hadronic Radiative Processes in Supermassive-Black-Hole Jets
• A Monte Carlo Bayesian Search for the Plausible Source of the Telescope Array Hotspot
• Describing correlated observations of neutrino and gamma ray flares from the blazar TXS 0506+056 with proton blazar model
• Production and propagation of ultra-high energy photons using CRPropa 3
• Ultrahigh-energy cosmic ray interactions as the origin of very high energy $\gamma -$rays from BL Lacs
• The Properties of Parsec-Scale Blazar Jets
• Hadronuclear interactions in the jet of low TeV luminosity AGN: Implications for the low-state very-high-energy gamma-ray emission
• Implications of a proton blazar inspired model on correlated observations of neutrinos with gamma-ray flaring blazars

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