The SEGUE K giant survey II: A Catalog of Distance Determinations for the SEGUE K giants in the Galactic Halo

Abstract

We present an online catalog of distance determinations for $6036$ K giants, most of which are members of the Milky Way's stellar halo. Their medium-resolution spectra from SDSS/SEGUE are used to derive metallicities and rough gravity estimates, along with radial velocities. Distance moduli are derived from a comparison of each star's apparent magnitude with the absolute magnitude of empirically calibrated color-luminosity fiducials, at the observed $(g-r{)}_0$ color and spectroscopic [Fe/H]. We employ a probabilistic approach that makes it straightforward to properly propagate the errors in metallicities, magnitudes, and colors into distance uncertainties. We also fold in $prior$ information about the giant-branch luminosity function and the different metallicity distributions of the SEGUE K-giant targeting sub-categories. We show that the metallicity prior plays a small role in the distance estimates, but that neglecting the luminosity prior could lead to a systematic distance modulus bias of up to 0.25 mag, compared to the case of using the luminosity prior. We find a median distance precision of $16\%$, with distance estimates most precise for the least metal-poor stars near the tip of the red-giant branch. The precision and accuracy of our distance estimates are validated with observations of globular and open clusters. The stars in our catalog are up to 125 kpc distant from the Galactic center, with 283 stars beyond 50 kpc, forming the largest available spectroscopic sample of distant tracers in the Galactic halo.

arXiv commentaccepted by APJ

References in corpus (41)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Sloan Digital Sky Survey: Technical Summary
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
• The Sloan Digital Sky Survey Photometric Camera
• The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
• The Multi-Object, Fiber-Fed Spectrographs for SDSS and the Baryon Oscillation Spectroscopic Survey
• Astrometric Calibration of the Sloan Digital Sky Survey
• 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
• The SEGUE Stellar Parameter Pipeline. I. Description and Initial Validation Tests
• The accretion origin of the Milky Way's stellar halo
• Distances, ages, and epoch of formation of globular clusters
• The SEGUE Stellar Parameter Pipeline. II. Validation with Galactic Globular and Open Clusters
• A Globular Cluster Metallicity Scale Based on the Abundance of Fe II
• The Milky Way stellar halo out to 40 kpc : Squashed, broken but smooth
• The radial velocity dispersion profile of the Galactic halo: Constraining the density profile of the dark halo of the Milky Way
• The SEGUE Stellar Parameter Pipeline. III. Comparison with High-Resolution Spectroscopy of SDSS/SEGUE Field Stars
• Kinematics of Metal-Poor Stars in the Galaxy. II. Proper Motions for a Large Non-Kinematically Selected Sample
• Quantifying Kinematic Substructure in the Milky Way's Stellar Halo
• The Shape and Profile of the Milky Way Halo as Seen by the CFHT Legacy Survey
• The QUEST RR Lyrae Survey II: The Halo Overdensities in the First Catalog
• Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. I. Crowded Field Photometry and Cluster Fiducial Sequences in ugriz
• The SEGUE Stellar Parameter Pipeline. IV. Validation with an Extended Sample of Galactic Globular and Open Clusters
• The SEGUE Stellar Parameter Pipeline. V. Estimation of Alpha-Element Abundance Ratios From Low-Resolution SDSS/SEGUE Stellar Spectra
• The cold veil of the Milky Way stellar halo
• Mapping the Galactic Halo I. The `Spaghetti' Survey
• NGC 6791: an exotic open cluster or the nucleus of a tidally disrupted galaxy?
• CCD Photometry of the Globular Cluster M5. I. The Color-Magnitude Diagram and Luminosity Functions
• Mapping the Galactic Halo VIII: Quantifying substructure
• Open clusters as key tracers of Galactic chemical evolution. III. Element abundances in Berkeley 20, Berkeley 29, Collinder 261, and Melotte 66
• Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members. I. Measurements, methods, and first results
• The metallicity of the old open cluster NGC 6791
• Stellar distances from spectroscopic observations: a new technique
• Metal abundances in extremely distant Galactic old open clusters. I. Berkeley 29 and Saurer 1
• Fiducial Stellar Population Sequences for the u'g'r'i'z' System
• Distance determination for RAVE stars using stellar models III: The nature of the RAVE survey and Milky Way chemistry
• Wide-Field CCD Photometry of the Globular Cluster M30
• Exploring the Upper Red Giant and Asymptotic Giant Branches: the Globular Cluster M5
• An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data

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