output
20022009
most citedEvent generation with SHERPA 1.1

2.3k citations

Showing 2003 · astro-phShow all

7 papers · 2 filters

astro-ph20032 cited

Ultra-High Energy Cosmic Rays from Quasar Remnants

C. Isola, G. Sigl, G. Bertone

One of the models recently proposed to explain the origin of the ultra high energy cosmic rays assumes that these particles may be accelerated by the electromotive force around pre…

astro-ph20032 cited

Void Hierarchy and Cosmic Structure

Rien van de Weygaert, Ravi Sheth

Within the context of hierarchical scenarios of gravitational structure formation we describe how an evolving hierarchy of voids evolves on the basis of {\em two} processes, the {\…

astro-ph2003

Luminosity and Redshift Dependence of Quasar Spectral Properties

D. E. Vanden Berk, C. -Y. Yip, A. J. Connolly +2

Using a large sample of quasar spectra from the SDSS, we examine the composite spectral trends of quasars as functions of both redshift and luminosity, independently of one another…

astro-ph2003

Volume-limited SDSS/FIRST quasars and the radio dichotomy

S. Jester, R. Kron

Much evidence has been presented in favor of and against the existence of two distinct populations of quasars, radio-loud and radio-quiet. The SDSS differs from earlier optically s…

astro-ph2003

New Resources to Explore the Old Galaxy: Mining the SDSS

C. Allende Prieto, T. C. Beers, Y. Li +3

The Sloan Digital Sky Survey (SDSS) is collecting photometry and intermediate resolution spectra for ~ 10**5 stars in the thick-disk and stellar halo of the Milky Way. This massive…

astro-ph2003

A New Method to Use Chandra Data to Resolve the X-Ray Halos Around Point Sources and Its Application to Cygnus X-1

Y. Yao, S. Nan Zhang, X. L. Zhang +1

With excellent angular resolution, good energy resolution and broad energy band, the Chandra ACIS is the best instrument for studying the X-ray halos around some galactic X-ray poi…