The SEGUE Stellar Parameter Pipeline. I. Description and Initial Validation Tests

Abstract

We describe the development and implementation of the SEGUE (Sloan Extension for Galactic Exploration and Understanding) Stellar Parameter Pipeline (SSPP). The SSPP derives, using multiple techniques, radial velocities and the fundamental stellar atmospheric parameters (effective temperature, surface gravity, and metallicity) for AFGK-type stars, based on medium-resolution spectroscopy and $ugriz$ photometry obtained during the course of the original Sloan Digital Sky Survey (SDSS-I) and its Galactic extension (SDSS-II/SEGUE). The SSPP also provides spectral classification for a much wider range of stars, including stars with temperatures outside of the window where atmospheric parameters can be estimated with the current approaches. This is Paper I in a series of papers on the SSPP; it provides an overview of the SSPP, and initial tests of its performance using multiple data sets. Random and systematic errors are critically examined for the current version of the SSPP, which has been used for the sixth public data release of the SDSS (DR-6).

64 pages, 8 tables, 12 figures, submitted to the Astronomical Journal

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• The Pristine Inner Galaxy Survey (PIGS) X. Probing the early chemical evolution of the Sagittarius dwarf galaxy with carbon abundances
• Red Runaways II: Low mass Hills stars in SDSS Stripe 82
• Exploring the SDSS Dataset with Linked Scatter Plots: I. EMP, CEMP, and CV Stars
• LAMA: LAMOST Medium-Resolution Spectral Analysis Pipeline
• Four Metal-poor Stars in the Sagittarius Dwarf Spheroidal Galaxy
• Target Selection for the SDSS-III MARVELS Survey
• A Search for Metal-poor Stars Pre-enriched by Pair-instability Supernovae I. A Pilot Study for Target Selection from Sloan Digital Sky Survey (SDSS)
• Observational nuclear astrophysics: neutron-capture element abundances in old, metal-poor stars
• Mapping the Asymmetric Thick Disk: III. The Kinematics and Interaction with the Galactic Bar
• Runaway Dwarf Carbon Stars as Candidate Supernova Ejecta
• A Blueprint for the Milky Way's Stellar Populations. IV. A String of Pearls $-$ the Galactic Starburst Sequence
• The Synthetic-Oversampling Method: Using Photometric Colors to Discover Extremely Metal-Poor Stars
• Dynamical Masses and Mass-to-light Ratios of Resolved Massive Star Clusters. I. NGC 419 and NGC 1846
• Deep SDSS Optical Spectroscopy of Distant Halo Stars. III. Chemical analysis of extremely metal-poor stars
• Evidence That Hydra I is a Tidally Disrupting Milky Way Dwarf Galaxy
• LEMONY--a Library of Empirical Medium-resolution spectra by Observations with the NAOC Xinglong 2.16\,m and YNAO Gaomeigu 2.4\,m telescopes
• A Pristine-UNIONS view on the Galaxy: Kinematics of the distant spur feature of the Sagittarius stream traced by Blue Horizontal Branch stars
• On the Automated and Objective Detection of Emission Lines in Faint-Object Spectroscopy
• An Expanded Chemo-dynamical Sample of Red Giants in the Bar of the Large Magellanic Cloud
• Possible evidence of hydrogen emission in the first-overtone and multi-mode RR Lyrae variables
• Young Blue Straggler Stars in the Galactic Field
• Supersolar metallicity in G0-G3 main sequence stars with V<15
• Nearby stellar substructures in the Galactic halo from DESI Milky Way Survey Year 1 Data Release
• Determination of Sodium Abundance Ratio from Low-Resolution Stellar Spectra and Its Applications
• A Monte-Carlo Method for Estimating Stellar Photometric Metallicity Distributions
• Globular and Open Clusters Observed by SDSS/SEGUE: the Giant Stars
• Automated Pipelines for Spectroscopic Analysis
• Automated Determination of [Fe/H] and [C/Fe] from Low-Resolution Spectroscopy
• Fuzzy Cluster Analysis: Application to Determining Metallicities for Very Metal-poor Stars
• Medium-resolution Spectroscopy of Red Giant Branch Stars in $\omega$ Centauri
• The Space Interferometry Mission Astrometric Grid Giant-Star Survey. III. Basic Stellar Parameters for an Extended Sample
• A Search for Strongly Mg-enhanced Stars from the Sloan Digital Sky Survey
• Photometric Metallicities in Bootes I
• Fragile Binary Candidates in the SDSS DR8 spectroscopic archive
• Prospects of measuring a metallicity trend and spread in globular clusters from low-resolution spectroscopy
• CoSHA: Code for Stellar properties Heuristic Assignment -- for the MaStar stellar library
• A Search for Candidate Li-Rich Giant Stars in SDSS DR10
• On the Use of Field RR Lyrae as Galactic Probes -- VIII. Early Formation of the Galactic Spheroid
• Deciphering the Milky Way's star formation at cosmic noon with high proper-motion stars: A precursor to the merger-driven starburst
• The Chemo-Dynamical History of the Milky Way as Revealed by SDSS/SEGUE
• The CH(G) Index as a New Criterion for Selecting Red Giant Stars
• Photo-Met: a non-parametric method for estimating stellar metallicity from photometric observations
• Metallicity calibration for solar type stars based on red spectra
• A statistical method for the identification of stars enriched in neutron-capture elements from medium-resolution spectra
• Searching For s-Process-Enhanced Metal-Poor Stars
• Statistical Properties of Blue Horizontal Branch Stars in the Spheroid: Detection of a Moving Group approximately 50 kpc from the Sun
• Validation of observations obtained with a liquid mirror telescope by comparison with Sloan Digital Sky Survey observations
• Blueshifted hydrogen emission and shock wave of RR Lyrae variables in SDSS and LAMOST
• The First Data Release of LAMOST Low Resolution Single Epoch Spectra
• SAGA: Stellar Abundances for Galactic Archaeology
• Dwarfs or giants? Stellar metallicities and distances in the Canada-France-Imaging-Survey from $ugrizG$ multi-band photometry
• rrlfe: Software for Generating and Applying Metallicity Calibrations for RR Lyrae Variable Stars Across a Wide Range of Phases and Temperatures
• J-PLUS: Searching for very metal-poor star candidates using the SPEEM pipeline
• SDSS-IV MaStar: Theoretical Atmospheric Parameters for the MaNGA Stellar Library