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7 papers · 2 filters
TeV mu Neutrinos from Young Neutron Stars
B. Link, Fiorella Burgio
Neutron stars are efficient accelerators for bringing charges up to relativistic energies. We show that if positive ions are accelerated to ~1 PeV near the surface of a young neutr…
The Origin of Helicity in Solar Active Regions
Arnab Rai Choudhuri, Piyali Chatterjee, Dibyendu Nandy
We present calculations of helicity based on our solar dynamo model and show that the results are consistent with observational data.
Statistical Isotropy of the Wilkinson Microwave Anisotropy Probe Data: A Bipolar Power Spectrum Analysis
Amir Hajian, Tarun Souradeep, Neil Cornish
The statistical expectation values of the temperature fluctuations of the Cosmic Microwave Background (CMB) are assumed to be preserved under rotations of the sky. We investigate t…
Iron K-alpha Fluorescent Line Profiles from Spiral Accretion Flows in AGNs
Keigo Fukumura, Sachiko Tsuruta
We present 6.4 keV iron K-alpha fluorescent line profiles predicted for a relativistic black hole accretion disk in the presence of a spiral motion in Kerr geometry, the work exten…
Isothermal Shock Formation in Non-Equatorial Accretion Flows around Kerr Black Holes
Keigo Fukumura, Sachiko Tsuruta
We explore isothermal shock formation in non-equatorial, adiabatic accretion flows onto a rotating black hole, with possible application to some active galactic nuclei (AGNs). The…
Full--Sphere Simulations of a Circulation--Dominated Solar Dynamo: Exploring the Parity Issue
Piyali Chatterjee, Dibyendu Nandy, Arnab Rai Choudhuri
We explore a two-dimensional kinematic solar dynamo model in a full sphere, based on the helioseismically determined solar rotation profile and with an effect concentrated near…