P. Roustazadeh

Multiwavelength and Multimessenger Observations of Blazars and Theoretical Modeling: Blazars as Astrophysical Neutrino Sources

Markus Boettcher, Matthew Fu, Timothy Govenor, Q. King et autres

This contribution reviews recent advances in the possible identification of blazars as potential sources of at least some of the very-high-energy neutrinos detected by the IceCube neutrino detector at the South Pole. The basic physical requirements for neutrino production and physics constraints …

Afrique du Sud, us (code pays fourni par la source)

Scaling of Relativistic Shear Flows with the Bulk Lorentz Factor

Edison Liang, Wen Fu, M. Böttcher, P. Roustazadeh

Abstract We compare Particle-in-cell simulation results of relativistic electron–ion shear flows with different bulk Lorentz factors, and discuss their implications for spine-sheath models of blazar versus gamma-ray burst (GRB) jets. Specifically, we find that most properties of the shear boundary layer scale …

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Time-Dependence of VHE Gamma-Ray induced Pair Cascades in Radio Galaxies

P. Roustazadeh, Markus Boettcher, Samantha Elaine Thrush

Time-Dependence of VHE gamma-ray induced Pair Cascades in AGN Environments

P. Roustazadeh

Recently, several intermediate frequency peaked BL Lac objects (IBL), low frequency peaked BL Lac objects (LBL) and flat spectrum radio quasars (FSRQ) were detected as very high energy ( VHE, E > 100 ∼ GeV) γ-ray sources.These discoveries suggest that γγ absorption …

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Time Variability of VHE Gamma-Ray Induced Pair Cascades in AGN Environments

P. Roustazadeh, Samantha Elaine Thrush, Markus Boettcher

Time-Dependence of VHE gamma-ray induced Pair Cascades in AGN Environments

P. Roustazadeh, S. Ghrush, M. Böttcher

Relativistic Shear Flows and Applications to Gamma-ray Burst and Blazar Jets

Edison Liang, Markus Boettcher, Wen Fu, P. Roustazadeh

Diagnosing particle acceleration in relativistic jets

M. Böttcher, Matthew G. Baring, Edison Liang, Errol J. Summerlin et autres

Abstract The high-energy emission from blazars and other relativistic jet sources indicates that electrons are accelerated to ultra-relativistic (GeV - TeV) energies in these systems. This paper summarizes recent results from numerical studies of two fundamentally different particle acceleration mechanisms potentially at …

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TEST OF MODELS OF THE COSMIC INFRARED BACKGROUND WITH MULTIWAVELENGTH OBSERVATIONS OF THE BLAZAR 1ES 1218+30.4 IN 2009

S. Archambault, T. Arlen, T. Aune, M. Beilicke et autres

We present the results of a multi-wavelength campaign targeting the blazar 1ES 1218+30.4 with observations with the 1.3 m McGraw-Hill optical telescope, the Rossi X-ray Timing Explorer ( RXTE ), the Fermi Gamma-Ray Space Telescope, and the Very Energetic Radiation Imaging Telescope …

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Relativistic Shear Flows and Applications to Astrophysical Jets

Edison Liang, Wen Zhi Fu, P. Roustazadeh, Ian A. Smith et autres

VizieR Online Data Catalog: S5 0716+714 microvariability observation (Bhatta+, 2013)

Gopal Bhatta, John R. Webb, H. Hollingsworth, S. Dhalla et autres

The 72-h WEBT microvariability observation of blazar S5 0716 + 714 in 2009

Gopal Bhatta, John R. Webb, H. Hollingsworth, S. Dhalla et autres

Context. The international Whole Earth Blazar Telescope (WEBT) consortium planned and carried out three days of intensive micro-variability observations of S5 0716 + 714 from February 22, 2009 to February 25, 2009. This object was chosen due to its bright apparent magnitude …

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