Deciphering the Origin of the GeV–TeV Gamma-Ray Emission from SS 433

  title={Deciphering the Origin of the GeV–TeV Gamma-Ray Emission from SS 433},
  author={Shigeo S. Kimura and Kohta Murase and P'eter M'esz'aros},
  journal={The Astrophysical Journal},
We investigate hadronic and leptonic scenarios for the GeV–TeV gamma-ray emission from jets of the microquasar SS 433. The emission region of the TeV photons coincides with the X-ray knots, where electrons are efficiently accelerated. On the other hand, the optical high-density filaments are also located close to the X-ray knots, which may support a hadronic scenario. We calculate multiwavelength photon spectra of the extended jet region by solving the transport equations for the electrons and… 

Magnetic Reconnection in Black Hole Magnetospheres: Lepton Loading into Jets, Superluminal Radio Blobs, and Multiwavelength Flares

Supermassive black holes in active galactic nuclei launch relativistic jets, as indicated by observed superluminal radio blobs. The energy source of these jets is widely discussed in the theoretical

Spatially resolved study of the SS 433/W 50 west region with Chandra: X-ray structure and spectral variation of non-thermal emission

The X-ray binary SS 433, embedded in the W 50 nebula (or supernova remnant W 50), shows bipolar jets that are ejected with mildly relativistic velocities and which extend toward the east and west

Observatory Galactic Science with the ASTRI-Mini Array during the observatory phase of the project

  • A. DaiE. Amato A. Tutone
  • Physics
    Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)
  • 2021
INAF IASF-PA, Via Ugo La Malfa, 153, Palermo, Italy INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125, Firenze, Italy CISAS, Centre of Studies and Activities for Space “G.

Energy estimation of high-energy particles associated with the SS 433/W 50 system through radio observation at 1.4 GHz

The radio nebula W 50 is a unique object interacting with the jets of the microquasar SS 433. The SS 433/W 50 system is a good target for investigating the energy of cosmic-ray particles

Continuous Jets and Backflow Models for the Formation of W50/SS 433 in Magnetohydrodynamics Simulations

The formation mechanism of the W50/SS 433 complex has long been a mystery. We propose a new scenario in which the SS 433 jets themselves form the W50/SS 433 system. We carry out magnetohydrodynamics



Fermi Non-detections of Four X-Ray Jet Sources and Implications for the IC/CMB Mechanism

Since its launch in 1999, the Chandra X-ray observatory has discovered several dozen X-ray jets associated with powerful quasars. In many cases, the X-ray spectrum is hard and appears to come from a

Multiwavelength Emission from Galactic Jets: The Case of the Microquasar SS433

SS433 is a Galactic microquasar with powerful jets, where very-high-energy particles are produced. We study particle acceleration in the jets of SS433 through the use of recent multiwavelength data

Tentative evidence of spatially extended GeV emission from SS433/W50

We have analyzed ten years of the Fermi Large Area Telescope data toward the SS433/W50 region. With the latest source catalog and diffuse background models, the γ-ray excess from SS433/W50 is

Testing the hadronuclear origin of PeV neutrinos observed with IceCube

We consider implications of the IceCube signal for hadronuclear (pp) scenarios of neutrino sources such as galaxy clusters/groups and star-forming galaxies. Since the observed neutrino flux is

Synchrotron versus Compton Interpretations for Extended X-Ray Jets

A widely discussed explanation for the origin of the X-ray emission observed from knots in extended quasar jets with the Chandra X-Ray Observatory is Compton-scattered cosmic microwave background

The X-Ray Jet of PKS 0637–752: Inverse Compton Radiation from the Cosmic Microwave Background?

We propose that the X-ray emission detected by Chandra from the 100 kpc-scale jet of PKS 0637-752 is produced through inverse Compton scattering of the cosmic microwave background (CMB). We analyze

GeV–TeV Counterparts of SS 433/W50 from Fermi-LAT and HAWC Observations

The extended jets of the microquasar SS 433 have been observed in optical, radio, X-ray, and recently very-high-energy γ-rays by High Altitude Water Cerenkov (HAWC). The detection of HAWC γ-rays with


The microquasar SS433 features the most energetic jets known in our Galaxy. A large fraction of the jet kinetic power is delivered to the surrounding W50 nebula at the jet termination shock, from


The X-ray emission mechanism in large-scale jets of powerful radio quasars has been a source of debate in recent years, with two competing interpretations: either the X-rays are of synchrotron

Hidden Cores of Active Galactic Nuclei as the Origin of Medium-Energy Neutrinos: Critical Tests with the MeV Gamma-Ray Connection.

It is shown that protons in the coronal plasma can be stochastically accelerated up to PeV energies by plasma turbulence, and it is found that the Bethe-Heitler process plays a crucial role in connecting these neutrinos and cascaded MeV gamma rays.