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19922026
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Showing 2001Show all

22 papers · 1 filter

math.DS2001

Mackey-Glass type delay differential equations near the boundary of absolute stability

E. Liz, E. Trofimchuk, S. Trofimchuk

For equations with -nonlinearity which has negative Schwarzian derivative and satisfies for …

astro-ph2001★ 19 cited

Large Scale Structure at z=1.2 Outlined by MgII Absorbers

G. M. Williger, L. E. Campusano, R. G. Clowes +1

The largest known structure in the high redshift universe is mapped by at least 18 quasars and spans ~5 deg x 2.5 deg on the sky, with a quasar spatial overdensity of 6-10 times ab…

astro-ph2001★ 168 cited

The Sloan Digital Sky Survey Quasar Catalog I. Early Data Release

Donald P. Schneider, Gordon T. Richards, Xiaohui Fan +9

We present the first edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of the 3814 objects (3000 discovered by the SDSS) in the initial SDSS publi…

astro-ph2001★ 135 cited

Detecting Clusters of Galaxies in the Sloan Digital Sky Survey I : Monte Carlo Comparison of Cluster Detection Algorithms

Rita S. J. Kim, Jeremy V. Kepner, Marc Postman +15

We present a comparison of three cluster finding algorithms from imaging data using Monte Carlo simulations of clusters embedded in a 25 deg^2 region of Sloan Digital Sky Survey (S…

astro-ph2001★ 157 cited

Chandra Observations of the Luminous IR Galaxy NGC3256

P. Lira, M. Ward, A. Zezas +2

We present a detailed analysis of high-resolution Chandra observations of the merger system NGC3256, the most IR luminous galaxy in the nearby universe. The X-ray data show that se…

astro-ph2001★ 36 cited

Unusual Metal Abundances in a Pair of Damped Lyman Alpha Systems at z~2

Sara L. Ellison, Sebastian Lopez

We present high resolution spectroscopic observations of two neighbouring damped Lya systems (DLAs) along the same line of sight towards B2314-409. Due to their separation (v ~ 200…