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- Publications
- Influence
First-Year Sloan Digital Sky Survey-II Supernova Results: Hubble Diagram and Cosmological Parameters
- R. Kessler, A. Becker, +43 authors D. York
- Physics
- 28 August 2009
We present measurements of the Hubble diagram for 103 Type Ia supernovae (SNe) with redshifts 0.04 < z < 0.42, discovered during the first season (Fall 2005) of the Sloan Digital Sky Survey-II… Expand
Exploring the Variable Sky with the Sloan Digital Sky Survey
- B. Sesar, Z. Ivezic, +29 authors D. V. Berk
- Physics, Geography
- 4 April 2007
We quantify the variability of faint unresolved optical sources using a catalog based on multiple SDSS imaging observations. The catalog covers SDSS stripe 82, which lies along the celestial equator… Expand
Narrow associated quasi-stellar object absorbers: clustering, outflows and the line-of-sight proximity effect
- V. Wild, G. Kauffmann, +16 authors Pennsylvania.
- Physics
- 27 February 2008
Using data from the Sloan Digital Sky Survey data release 3 (SDSS DR3) we investigate how narrow (< 700km/s) C IV and Mg II quasar absorption line systems are distributed around quasars. The C IV… Expand
Distributions of galaxy spectral types in the Sloan Digital Sky Survey
- Ching-Wa Yip, A. Connolly, +12 authors Z. Ivezic
- Physics
- 2 July 2004
We perform an objective classification of 170,000 galaxy spectra in the Sloan Digital Sky Survey (SDSS) using the Karhunen-Loeve (KL) transform. With about one-sixth of the total set of galaxy… Expand
THE SDSS-III BARYON OSCILLATION SPECTROSCOPIC SURVEY: THE QUASAR LUMINOSITY FUNCTION FROM DATA RELEASE NINE
- N. Ross, I. McGreer, +39 authors D. York
- Physics
- 23 October 2012
We present a new measurement of the optical quasar luminosity function (QLF), using data from the Sloan Digital Sky Survey-III: Baryon Oscillation Spectroscopic Survey (SDSS-III: BOSS). From the… Expand
Probing the extended gaseous regions of M31 with quasar absorption lines
- S. Rao, G. Sardane, +4 authors D. York
- Physics
- 27 February 2013
We present HST-COS spectra of ten quasars located behind M31, selected to investigate the properties of gas associated with its extended disk and high velocity clouds (HVCs). The sightlines have… Expand
Eruption ages and magma supply rates during the miocene evolution of Gran Canaria
- P. Bogaard, H. Schmincke, A. Freundt, C. Hall, D. York
- Geology
- Naturwissenschaften
- 1 December 1988
the estimation by some workers [5], the age of Copernicus is 0 . 8 1.5 x 109a. The K-Ar age of some Apol lo 12 samples gave an age of about 0.8 x 109a, which was interpreted as the age of Copernicus… Expand
Quasars with P v broad absorption in BOSS data release 9
- D. Capellupo, F. Hamann, +7 authors D. York
- Physics
- 24 April 2017
Broad absorption lines (BALs) found in a significant fraction of quasar spectra identify high‐velocity outflows that might be present in all quasars and could be a major factor in feedback to galaxy… Expand
The Astronomy Revolution : 400 Years of Exploring the Cosmos
- D. York, O. Gingerich, S. Zhang
- Physics
- 28 November 2011
Introduction: The New Vision 400 Project Creativity and Technology in Astronomical Discovery From the Language of Heaven to the Rationale of Matter Tsung-Dao Lee The Impact of Modern Telescope… Expand
The dark matter haloes and host galaxies of Mg II absorbers at z~ 1
- B. Lundgren, D. Wake, N. Padmanabhan, A. Coil, D. York
- Physics
- 8 June 2011
Strong foreground absorption features from singly ionized magnesium (Mg II) are commonly observed in the spectra of quasars and are presumed to probe a wide range of galactic environments. To date,… Expand