SEGUE: A SPECTROSCOPIC SURVEY OF 240,000 STARS WITH g = 14–20

By Brian Yanny, C. Rockosi, Heidi Jo Newberg, G. Knapp, J. Adelman-McCarthy, Bonnie Alcorn, Sahar Allam, Carlos Prieto Allende, D. An, K. S. Anderson and 98 more. 2009

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The Sloan Extension for Galactic Understanding and Exploration (SEGUE) Survey obtained ≈240,000 moderate-resolution (R ∼ 1800) spectra from 3900 Å to 9000 Å 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 at g < 18, degrading to at g ∼ 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 deg2 of additional ugriz imaging (primarily at low Galactic latitudes) providing precise multicolor photometry (σ(g, r, i) ∼ 2%), (σ(u, z) ∼ 3%) and astrometry (≈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.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/9d299a03cb31f36621372674b934a0dfc394de04

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THE CASE FOR THE DUAL HALO OF THE MILKY WAY (2011, methodology): “The region known as Stripe 82 (an area of ∼250 deg2 along the Celestial Equator) has been multiply scanned in the ugriz filters over the course of SDSS and its extensions, in particular during the Supernova Survey conducted as part of SDSS-II (Frieman et al. 2008).”
Estimating stellar birth radii and the time evolution of Milky Way’s ISM metallicity gradient (2018, positive): “…et al. (2014b) found a decline in the stellar velocity dispersion as a function of [Mg/Fe] in data from the RAVE (Steinmetz et al. 2006) and SEGUE (Yanny et al. 2009) surveys (seen also in Gaia-ESO data by Guiglion et al. 2015; Hayden et al. 2018), reasoning that these high-[α/Fe], kinematically…”
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) (2007, neutral): “…“Galactic archaeology” spectroscopic surveys that aim to fill this need have been previously undertaken — such as RAVE (Steinmetz et al. 2006), SEGUE-1 (Yanny et al. 2009), SEGUE-2 (Rockosi et al. 2009), and ARGOS (Freeman et al. 2013) — are currently underway — such as LAMOST (Cui et al. 2012),…”
A SEARCH FOR STARS OF VERY LOW METAL ABUNDANCE. VI. DETAILED ABUNDANCES OF 313 METAL-POOR STARS (2014, background): “…candidate metal-poor stars from low resolution spectroscopy, including the Radial Velocity Experiment (RAVE; see Fulbright et al. 2010), the Sloan Digital Sky Survey (SDSS), and the Sloan Extensions for Galactic Understanding and Exploration (SEGUE-1 and SEGUE-2; Yanny et al. 2009; Rockosi 2012).”
The structure and dynamical evolution of the stellar disc of a simulated Milky Way-mass galaxy (2016, background): “G A ] Thanks to spectroscopic surveys of stars in the MW, such as RAVE (Steinmetz et al. 2006), SEGUE (Yanny et al. 2009), APOGEE (Allende Prieto et al. 2008), and Gaia-ESO (Gilmore et al. 2012), one can now combine three-dimensional position, velocity, and chemical abundance information for large…”
The Gaia-ESO Survey: the analysis of high-resolution UVES spectra of FGK-type stars (2014, background): “…and Exploration (LEGUE, Deng et al. 2012), the RAdial Velocity Experiment (RAVE, Steinmetz et al. 2006; Kordopatis et al. 2013), the Sloan Extension for Galactic Understanding and Exploration (SEGUE, Yanny et al. 2009), and the Gaia-ESO Survey (Gilmore et al. 2012; Randich & Gilmore 2013).”
The Galaxy in Context: Structural, Kinematic, and Integrated Properties (2016, background): “The GCS survey covers the full sky but is confined to the Solar Neighborhood; the SEGUE, RAVE, and APOGEE surveys penetrate deeper into the Galaxy than earlier stellar surveys.”
Chemical evolution with rotating massive star yields - I. The solar neighbourhood and the s-process elements (2018, background): “Several ongoing large spectroscopic surveys such as Gaia ESO, SEGUE, APOGEE, HARPS, RAVE or GALAH (Gilmore et al. 2012; Yanny et al. 2009; Wilson et al. 2010; Steinmetz 2003; Heijmans et al. 2012; Adibekyan et al. 2012; Bensby et al. 2014; Battistini & Bensby 2016; Delgado Mena ?”
A new determination of the local dark matter density from the kinematics of K dwarfs (2012, background): “The black line is a linear fit to the data between [Fe/H] = −0.7 and 0 dex. et al. (2002) and SEGUE data – finding that our results are not sensitive to plausible changes in our distance calibration.”
MAPPING THE STELLAR STRUCTURE OF THE MILKY WAY THICK DISK AND HALO USING SEGUE PHOTOMETRY (2009, methodology): “It arcs through the North Galactic cap through the stripes at l=229◦, 270◦, 300◦, and 330◦at high latitudes (Belokurov et al. 2006), and intersects the stripes at l=94◦ and 178◦ at negative latitudes (Majewski et al. 2003; Yanny et al. 2009b).”
THE STELLAR POPULATION STRUCTURE OF THE GALACTIC DISK (2015, background): “However, the limited radial coverage and high-latitude survey geometry of the SDSS/SEGUE sample (Yanny et al. 2009) impeded more detailed measurements of the radial surface density profile beyond characterizing the local slope (in radius) by an exponential-disk scale length.”
THE SPATIAL STRUCTURE OF MONO-ABUNDANCE SUB-POPULATIONS OF THE MILKY WAY DISK (2011, methodology): “The Sloan Extension for Galactic Understanding and Exploration (SEGUE ; Yanny et al. 2009) is a lowresolution (R ≈ 2, 000) spectroscopic sub-survey of the SDSS focused on Galactic science.”
THE MOST METAL-POOR STARS. IV. THE TWO POPULATIONS WITH [Fe/H] ≲ −3.0 (2012, background): “…Hamburg/ESO Survey (HES; Wisotzki et al. 1996; Christlieb et al. 2008), the Sloan Digital Sky Survey (SDSS; York et al. 2000) and the SEGUE survey (Yanny et al. 2009) has greatly increased the sample 1 Research School of Astronomy and Astrophysics, The Australian National University, Weston, ACT…”
INSIDE OUT AND UPSIDE DOWN: TRACING THE ASSEMBLY OF A SIMULATED DISK GALAXY USING MONO-AGE STELLAR POPULATIONS (2013, methodology): “Motivation for our study comes partly from analysis of the SDSS Sloan Extension for Galactic Understanding and Exploration (SEGUE) (Yanny et al. 2009) G dwarf sample by Bovy et al. (2012a,b,c).”
The effects of radial migration on the vertical structure of Galactic discs (2012, background): “…stronger once metallicities and abundances are also considered: Liu & vande Ven (2012) showed that low eccentricity stars from a SEGUE survey (Yanny et al. 2009) sample follow a continuous distributionin the [Fe/H]-[α/Fe] plane while the high eccentricity stars seem disconnected in this…”
The Dawes Review 2: Nucleosynthesis and Stellar Yields of Low- and Intermediate-Mass Single Stars (2014, background): “Not only are yields needed for chemical evolution modelling but they are also needed to interpret the wealth of observational data coming from current surveys such as SkyMapper (Keller et al. 2007) and SEGUE (Yanny et al. 2009), which are geared toward discovering metal-poor stars in the Galactic ha”
THE MULTI-OBJECT, FIBER-FED SPECTROGRAPHS FOR THE SLOAN DIGITAL SKY SURVEY AND THE BARYON OSCILLATION SPECTROSCOPIC SURVEY (2012, methodology): “SEGUE-II, a one-year extension of the Sloan Extension for Extra-Galactic Understanding and Exploration (SEGUE; Yanny et al. 2009) was approved for one observing season to use the SDSS spectrograph from mid-2008 to mid-2009.”