Accession Number:

ADA499412

Title:

Segue: A Spectroscopic Survey of 240,000 Stars With g = 14-20

Descriptive Note:

Journal article

Corporate Author:

FERMI NATIONAL ACCELERATOR LAB BATAVIA IL

Report Date:

2009-05-01

Pagination or Media Count:

24.0

Abstract:

The Sloan Extension for Galactic Understanding and Exploration SEGUE Survey obtained nearly equal to 240,000 moderate-resolution R difference 1800 spectra from 3900 Angstrom to 9000 Angstom of fainter Milky Way stars 14.0 g 20.3 of a wide variety of spectral types, both main-sequence and evolved objects, with the goal of studying the kinematics and populations of our Galaxy and its halo. The spectra are clustered in 212 regions spaced over three quarters of the sky. Radial velocity accuracies for stars are sigma RV tilde 4 km sexp -1 at g 18, degrading to sigma RV tilde 15 km sexp-1 at g tilde 20. For stars with signal-to-noise ratio 10 per resolution element, stellar atmospheric parameters are estimated, including metallicity, surface gravity, and effective temperature. SEGUE obtained 3500 degexp 2 of additional ugriz imaging primarily at low Galactic latitudes providing precise multicolor photometry sigmag, r, i tilde 2, sigmau, z tilde 3 and astrometry approx. 0.1 for spectroscopic target selection. The stellar spectra, imaging data, and derived parameter catalogs for this survey are publicly available as part of Sloan Digital Sky Survey Data Release 7.

Subject Categories:

  • Astronomy
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE