THE SEVENTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY
- K. Abazajian, J. Adelman-McCarthy, D. Zucker
- Physics
- 3 December 2008
A series of improvements to the spectroscopic reductions are described, including better flat fielding and improved wavelength calibration at the blue end, better processing of objects with extremely strong narrow emission lines, and an improved determination of stellar metallicities.
Detailed Structural Decomposition of Galaxy Images
We present a two-dimensional fitting algorithm (GALFIT) designed to extract structural components from galaxy images, with emphasis on closely modeling light profiles of spatially well-resolved,…
Ground-based and Airborne Instrumentation for Astronomy III
- R. Davies, N. Ageorges, M. Wegner
- Physics
- 2010
DETAILED DECOMPOSITION OF GALAXY IMAGES. II. BEYOND AXISYMMETRIC MODELS
We present a two-dimensional (2D) fitting algorithm (Galfit, ver. 3) with new capabilities to study the structural components of galaxies and other astronomical objects in digital images. Our…
THE ELEVENTH AND TWELFTH DATA RELEASES OF THE SLOAN DIGITAL SKY SURVEY: FINAL DATA FROM SDSS-III
- S. Alam, F. D. Albareti, Key Laboratory of Optical Astronomy
- Physics
- 5 January 2015
The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical…
Sloan Digital Sky Survey: Early Data Release
- C. Stoughton, R. Lupton, Wei Zheng
- Physics
- 2002
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of ≈106 galaxies, 100,000…
Nearly 5000 Distant Early-Type Galaxies in COMBO-17: A Red Sequence and Its Evolution since z ~ 1
- E. Bell, C. Wolf, D. Mcintosh
- Physics
- 17 March 2003
We present the rest-frame colors and luminosities of ~25,000 mR ≲ 24 galaxies in the redshift range 0.2 < z ≤ 1.1 drawn from 0.78 deg2 of the COMBO-17 survey (Classifying Objects by Medium-Band…
The Milky Way’s Circular Velocity Curve to 60 kpc and an Estimate of the Dark Matter Halo Mass from the Kinematics of ~2400 SDSS Blue Horizontal-Branch Stars
- X. Xue, H. Rix, D. Schneider
- Physics
- 8 January 2008
We derive new constraints on the mass of the Milky Way’s dark matter halo, based on 2401 rigorously selected blue horizontal-branch halo stars from SDSS DR6. This sample enables construction of the…
3D-HST+CANDELS: THE EVOLUTION OF THE GALAXY SIZE–MASS DISTRIBUTION SINCE z = 3
- A. van der Wel, M. Franx, D. Kocevski
- Physics
- 10 April 2014
Spectroscopic+photometric redshifts, stellar mass estimates, and rest-frame colors from the 3D-HST survey are combined with structural parameter measurements from CANDELS imaging to determine the…
The Sixth Data Release of the Sloan Digital Sky Survey
- J. Adelman-McCarthy, M. Agüeros, D. Zucker
- Physics
- 23 July 2007
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and…
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