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The Seventh Data Release of the Sloan Digital Sky Survey
K. Abazajian
This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDS…
Maximum Likelihood Fitting of Tidal Streams With Application to the Sagittarius Dwarf Tidal Tails
Nathan Cole, Heidi Jo Newberg, Malik Magdon-Ismail +10
We present a maximum likelihood method for determining the spatial properties of tidal debris and of the Galactic spheroid. With this method we characterize Sagittarius debris usin…
Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
M. Kowalski, D. Rubin, G. Aldering +67
We present a new compilation of Type Ia supernovae (SNe Ia), a new dataset of low-redshift nearby-Hubble-flow SNe and new analysis procedures to work with these heterogeneous compi…
The Milky Way Tomography with SDSS: II. Stellar Metallicity
Zeljko Ivezic, Branimir Sesar, Mario Juric +50
Using effective temperature and metallicity derived from SDSS spectra for ~60,000 F and G type main sequence stars (0.2<g-r<0.6), we develop polynomial models for estimating these…
The Milky Way's Circular Velocity Curve to 60 kpc and an Estimate of the Dark Matter Halo Mass from Kinematics of ~2400 SDSS Blue Horizontal Branch Stars
X. -X. Xue, H. -W. Rix, G. Zhao +14
We derive new constraints on the mass of the Milky Way's dark matter halo, based on a set of halo stars from SDSS as kinematic tracers. Our sample comprises 2401 rigorously selecte…
The SEGUE Stellar Parameter Pipeline. II. Validation with Galactic Globular and Open Clusters
Y. S. Lee, T. C. Beers, T. Sivarani +13
We validate the performance and accuracy of the current SEGUE (Sloan Extension for Galactic Understanding and Exploration) Stellar Parameter Pipeline (SSPP), which determines stell…
The SEGUE Stellar Parameter Pipeline. I. Description and Initial Validation Tests
Y. S. Lee, T. C. Beers, T. Sivarani +10
We describe the development and implementation of the SEGUE (Sloan Extension for Galactic Exploration and Understanding) Stellar Parameter Pipeline (SSPP). The SSPP derives, using…
The Fifth Data Release of the Sloan Digital Sky Survey
Jennifer K. Adelman-McCarthy
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through June 2005 and represents the completion…
The Overdensity in Virgo, Sagittarius Debris, and the Asymmetric Spheroid
Heidi Jo Newberg, Brian Yanny, Nate Cole +4
We investigate the relationship between several previously identified Galactic halo stellar structures in the direction of Virgo using imaging and spectroscopic observations of F t…
SDSS spectroscopic survey of stars
Z. Ivezic, D. Schlegel, A. Uomoto +37
In addition to optical photometry of unprecedented quality, the Sloan Digital Sky Survey (SDSS) is also producing a massive spectroscopic database. We discuss determination of stel…
Candidate Milky Way Satellites in the Galactic Halo
C. Liu, J. Hu, H. Newberg +1
Sloan Digital Sky Survey (SDSS) DR5 photometric data with , are searched for new Milky Way companions or substructures in…
Transformation from SDSS Photometric System to Johnson-Morgan-Cousins System in HK Survey
Chongshan Zhao, Heidi Jo Newberg
We calculate the transformation from the Sloan Digital Sky Survey (SDSS) photometric system to the Johnson-Morgan-Cousins System in the HK Survey. This research was done in late 20…
The Sloan Digital Sky Survey Monitor Telescope Pipeline
D. L. Tucker, S. Kent, M. W. Richmond +31
The photometric calibration of the Sloan Digital Sky Survey (SDSS) is a multi-step process which involves data from three different telescopes: the 1.0-m telescope at the US Naval…
Detection of a population gradient in the Sagittarius Stream
M. Bellazzini, H. J. Newberg, M. Correnti +2
We present a quantitative comparison between the Horizontal Branch morphology in the core of the Sagittarius dwarf spheroidal galaxy (Sgr) and in a wide field sampling a portion of…
A Curious New Milky Way Satellite in Ursa Major
D. B. Zucker, V. Belokurov, N. W. Evans +29
In this Letter, we study a localized stellar overdensity in the constellation of Ursa Major, first identified in Sloan Digital Sky Survey (SDSS) data and subsequently followed up w…
An Orphan in the "Field of Streams"
V. Belokurov, N. W. Evans, M. J. Irwin +19
We use Sloan Digital Sky Survey Data Release 5 photometry and spectroscopy to study a tidal stream that extends over 50 degrees in the North Galactic Cap. From the analysis of the…
New Models for a Triaxial Milky Way Spheroid and Effect on the Microlensing Optical Depth to the Large Magellanic Cloud
Christopher Savage, Heidi Jo Newberg, Katherine Freese +1
We obtain models for a triaxial Milky Way spheroid based on data by Newberg and Yanny. The best fits to the data occur for a spheroid center that is shifted by 3kpc from the Galact…
A Spectroscopic Study of the Ancient Milky Way: F- and G-Type Stars in the Third Data Release of the Sloan Digital Sky Survey
C. Allende Prieto, T. C. Beers, R. Wilhelm +4
(Abridged) We perform an analysis of spectra and photometry for 22,770 stars included in the third data release (DR3) of the SDSS. We measure radial velocities and, based on a mode…
The Metallicity Distribution Function of the Halo of the Milky Way
Timothy C. Beers, Norbert Christlieb, John E. Norris +8
We report on the distribution of metallicities, [Fe/H], for very metal-poor stars in the halo of the Galaxy. Although the primary information on the nature of the Metallicity Distr…
The Fourth Data Release of the Sloan Digital Sky Survey
J. K. Adelman-McCarthy et al.
This paper describes the fourth data release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through June 2004. The data release includes five-band…
The Milky Way's stellar halo - lumpy or triaxial?
Heidi Jo Newberg, Brian Yanny
We present minimum chi-squared fits of power law and Hernquist density profiles to F-turnoff stars in eight 2.5 deg wide stripes of SDSS data: five in the North Galactic Cap and th…
Spectroscopic Observations and Analysis of the Unusual Type Ia SN 1999ac
The Supernova Cosmology Project, :, G. Garavini +55
We present optical spectra of the peculiar Type Ia supernova (SN Ia) 1999ac. The data extend from -15 to +42 days with respect to B-band maximum and reveal an event that is unusual…
The Sloan Digital Sky Survey Quasar Catalog III. Third Data Release
D. P. Schneider, P. B. Hall, G. T. Richards +50
We present the third edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of the 46,420 objects in the SDSS Third Data Release that have luminosities…
The Halo of the Milky Way
Heidi Jo Newberg, Brian Yanny
We show that the star counts in the spheroid of the Milky Way are not symmetric about the l=0, l=180 deg. plane. The minimum counts are found towards l=155 deg. The Galactic longit…