ARE LOW-LUMINOSITY GAMMA-RAY BURSTS GENERATED BY RELATIVISTIC JETS?

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Relativistic Jets from Collapsars: Gamma-Ray Bursts

Growing observational evidence supports the proposition that gamma-ray bursts (GRBs) are powered by relativistic jets from massive helium stars whose cores have collapsed to black holes and an accretion disk (collapsars). We model the propagation of relativistic jets through the stellar progenitor and its wind using a two-dimensional special relativistic hydrodynamics code based on the PPM form...

متن کامل

Effects of Luminosity Functions Induced by Relativistic Beaming on Statistics of Cosmological Gamma-Ray Bursts

Most of gamma-ray bursts (GRBs) models have predicted that the intrinsic isotropic energy is limited to below ∼ 10ergs. Recently claimed high redshifts, correlation with supernovae, and connection to the cosmic star formation activity point to a different energy requirement and source evolution history possibly with strong beaming. We study the effects of the beaming-induced luminosity function...

متن کامل

Gamma-ray bursts from alternating-current jets

We propose a gamma-ray burst scenario involving relativistic jets dominated by Poynting flux with alternating toroidal magnetic fields. Such a structure may arise naturally if the jet is formed and powered by the accretion flow in the core of a collapsar. We conjecture that the polarity of the toroidal magnetic field changes randomly due to hydromagnetic turbulence driven by the magneto-rotatio...

متن کامل

Gamma-Ray Bursts: Jets and Energetics

The relativistic outflows from gamma-ray bursts are now thought to be narrowly collimated into jets. After correcting for this jet geometry there is a remarkable constancy of both the energy radiated by the burst and the kinetic energy carried by the outflow. Gamma-ray bursts are still the most luminous explosions in the Universe, but they release energies that are comparable to supernovae. The...

متن کامل

Gamma-ray bursts: afterglows from cylindrical jets

Nearly all previous discussion on beaming effects in gamma-ray bursts have assumed a conical geometry. However, more and more observations on relativistic jets in radio galaxies, active galactic nuclei, and “microquasars” in the Galaxy have shown that many of these outflows are not conical, but cylindrical, i.e., they maintain constant cross sections at large scales. Thus it is necessary to dis...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The Astrophysical Journal

سال: 2011

ISSN: 2041-8205,2041-8213

DOI: 10.1088/2041-8205/739/2/l55