Pulsars Cannot Account for the Inner Galaxy’s GeV Excess
نویسندگان
چکیده
Dan Hooper, Ilias Cholis, Tim Linden, Jennifer Siegal-Gaskins, and Tracy Slatyer Center for Particle Astrophysics, Fermi National Accelerator Laboratory, Batavia, IL 60510 Department of Astronomy and Astrophysics, University of Chicago, 5640 S Ellis Ave., Chicago, IL 60637 Department of Physics, University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 Einstein Fellow, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 and School of Natural Sciences, Institute for Advanced Study, Princeton, NJ 08540 (Dated: May 7, 2013)
منابع مشابه
Millisecond pulsars cannot account for the inner Galaxy’s GeVexcess
Dan Hooper, Ilias Cholis, Tim Linden, Jennifer M. Siegal-Gaskins, and Tracy R. Slatyer Center for Particle Astrophysics, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA Department of Astronomy and Astrophysics, University of Chicago, 5640 S Ellis Avenue, Chicago, Illinois 60637, USA Department of Physics, University of California, Santa Cruz, 1156 High Street, Santa Cruz, Ca...
متن کاملHigh Magnetic Field Pulsars and Magnetars: A Unified Picture.
We propose a unified picture of high magnetic field radio pulsars and magnetars by arguing that they are all rotating high-field neutron stars but that their magnetic axes have different orientations with respect to their rotation axes. In strong magnetic fields where photon splitting suppresses pair creation near the surface, the high-field pulsars can have active inner accelerators while the ...
متن کاملStudy of the High Energy Gamma-ray Emission from the Crab Pulsar with the MAGIC telescope and Fermi-LAT
My thesis deals with a fundamental question of high energy gamma-ray astronomy. Namely, I studied the cut-off shape of the Crab pulsar spectrum to distinguish between the leading scenarios for the pulsar models. Pulsars are celestial objects, which emit periodic pulsed electromagnetic radiation (pulsation) from radio to high energy gamma-rays. Two major scenarios evolved in past 40 years to exp...
متن کاملX-ray and Radio Observations of Bright Gev Sources
We present X-ray and radio studies of sources which are bright above 1 GeV (F>1GeV ≥ 4 × 10−8ph cm−2 s−1). Only 11 out of ∼ 30 of these γ−ray sources have been identified with lower energy counterparts: 5 blazars and 6 pulsars. Three of these pulsars are surrounded by radio pulsar wind nebulae (PWN), two of which are also seen as bright, extended X-ray synchrotron nebulae. The ASCA X-ray telesc...
متن کاملEvaluation of Models for Diffuse Continuum Gamma Rays in EGRET Range
The GALPROP model for cosmic-ray (CR) propagation produces explicit predictions for the angular distribution of Galactic diffuse γ-rays. We compare our current models with EGRET spectra for various regions of the sky. This allows a critical test of alternative hypotheses for the observed GeV excess. We show that a population of hard-spectrum γ-ray sources cannot be solely responsible for the ex...
متن کامل