Zobrazeno 1 - 7
of 7
pro vyhledávání: '"B. C. Wilhite"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 383:1232-1240
Repeat scans by the Sloan Digital Sky Survey (SDSS) of a 278 square degree stripe along the Celestial equator have yielded an average of over 10 observations each for nearly 8,000 spectroscopically confirmed quasars. Over 2500 of these quasars are in
Publikováno v:
The Astrophysical Journal. 641:78-89
We examine the variability of the high-ionizaton C IV line in a sample of 105 quasars observed at multiple epochs by the Sloan Digital Sky Survey. We find a strong correlation between the change in the C IV line flux and the change in the line width,
Publikováno v:
The Astrophysical Journal. 496:L85-L88
We compare the statistical properties of structures normal and transverse to the line of sight which appear in theoretical N-body simulations of structure formation, and seem also to be present in observational data from redshift surveys. We present
We investigate the time-dependent variations of ultraviolet (UV) black hole mass estimates of quasars in the Sloan Digital Sky Survey (SDSS). From SDSS spectra of 615 high-redshift (1.69 < z < 4.75) quasars with spectra from two epochs, we estimate b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::889bc075bb6f7bf2866857d6fe06aef1
Autor:
D. Q. Lamb, Richard G. Kron, D. P. Schneider, Gordon T. Richards, B. C. Wilhite, D. E. vanden Berk, Scott F. Anderson, Robert J. Brunner, J. Brinkmann, Robert C. Nichol, Patrick B. Hall, Z. Ivezic, David J. Schlegel, D. G. York
Using a sample of over 25000 spectroscopically confirmed quasars from the Sloan Digital Sky Survey, we show how quasar variability in the rest frame optical/UV regime depends upon rest frame time lag, luminosity, rest wavelength, redshift, the presen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::207bb6d3ff0dfc3365df80bd48c0f25d
http://arxiv.org/abs/astro-ph/0310336
http://arxiv.org/abs/astro-ph/0310336
Autor:
Kevork N. Abazajian, Chris Stoughton, Mike Harvanek, Daniel E. Vanden Berk, Richard G. Kron, John W. Briggs, James Wren, Greg Hennessy, Jennifer Adelman, Douglas L. Tucker, Timothy A. McKay, Stephen J. Kent, Daniel E. Reichart, J. Brinkmann, John F. Beacom, Jurek Krzesinski, Zeljko Ivezic, Dan Long, Robert H. Lupton, Brian Yanny, Brian C. Lee, István Csabai, Peter R. Newman, Robert Kehoe, B. C. Wilhite, Russet McMillan, Bing Chen, S. A. Snedden, Kevin Hurley, James Annis, Scot Kleinman, Eric H. Neilsen, Donald P. Schneider, D. Q. Lamb, Arne Henden, Heidi Jo Newberg, Donald G. York, Atsuko Nitta, Povilas Palunas
The Sloan Digital Sky Survey (SDSS) will image one quarter of the sky centered on the northern galactic cap and produce a 3-D map of galaxies and quasars found in the sample. An additional 225 deg 2 southern survey will be imaged repeatedly on varyin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c6a219d2ef4b2b89883ce8689c8e6b2
https://resolver.caltech.edu/CaltechAUTHORS:20111026-110503394
https://resolver.caltech.edu/CaltechAUTHORS:20111026-110503394
Autor:
Christopher J. Miller, Jack O. Burns, B. C. Wilhite, Dmitri I. Novikov, Adrian L. Melott, David J. Batuski, Michael J. Kaufman
Within Abell galaxy clusters containing wide-angle tailed radio sources, there is evidence of a ``prevailing wind'' which directs the WAT jets. We study the alignment of WAT jets and nearby clusters to test the idea that this wind may be a fossil of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04552175b0e17ec32a6179feba3c22d2