Publications
Explore 75 academic publications
Slicing Through Multicolor Space: Galaxy Redshifts from Broadband Photometry
As a means of better understanding the evolution of optically selected galaxies we consider the distribution of galaxies within the multicolor space $U$, $B_J$, $R_F$ and $I_N$....
Astronomical calibration of Oligocene--Miocene time
Lithological cyclicity was observed aboard the JOIDES RESOLUTION in sediment sequences recovered from the Ceara Rise during ODP Leg 154. Shipboard work led to the conclusion tha...
The Discovery of a Luminous [CLC][ITAL]z[/ITAL][/CLC] = 5.80 Quasar from the Sloan Digital Sky Survey
We present observations of SDSSp J104433.04--012502.2, a luminous quasar at z=5.80 discovered from Sloan Digital Sky Survey (SDSS) multicolor imaging data. This object was selec...
Uncertainties in the Modeling of Old Stellar Populations
view Abstract Citations (282) References (125) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Uncertainties in the Modeling of Old Stellar Popu...
Candidate RR Lyrae Stars Found in Sloan Digital Sky SurveyCommissioning Data*
We present a sample of 148 candidate RR Lyrae stars selected from Sloan Digital Sky Survey (SDSS) commissioning data for about 100 deg 2 of sky surveyed twice with Δ t = 1.9946 ...
<i>r</i>‐Process Abundances and Chronometers in Metal‐poor Stars
Rapid neutron-capture (i.e., r-process) nucleosynthesis calculations, employing internally consistent and physically realistic nuclear physics input (QRPA beta-decay rates and t...
Simulation of Stellar Objects in SDSS Color Space
We present a simulation of the spatial, luminosity and spectral distributions of four types of stellar objects. We simulate: (1) Galactic stars, based on a Galactic structure mo...
Weak Lensing with Sloan Digital Sky Survey Commissioning Data: The Galaxy-Mass Correlation Function to 1 [CLC][ITAL]h[/ITAL][/CLC][TSUP]−1[/TSUP] M[CLC]pc[/CLC]
(abridged) We present measurements of galaxy-galaxy weak lensing from early commissioning imaging data from the Sloan Digital Sky Survey (SDSS). We measure a mean tangential she...
High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data
We present photometric and spectroscopic observations of 15 high-redshift quasars (z > 3.6) discovered from ~140 deg^2 of five-color (u'g'r'i'z') imaging data taken by the Sloan...
Nuclear cosmochronology within analytic models of the chemical evolution of the solar neighbourhood
This paper investigates whether the age of the Galaxy can be deduced from natural radioactivity. I demonstrate that two recent influential claims (by Butcher and by Fowler) that...
L Dwarfs Found in Sloan Digital Sky Survey Commissioning Imaging Data
This paper describes the discovery of seven dwarf objects of spectral type `L' (objects cooler than the latest M dwarfs) in commissioning imaging data taken by the Sloan Digital...