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Title: THE SDSS-IV EXTENDED BARYON OSCILLATION SPECTROSCOPIC SURVEY: OVERVIEW AND EARLY DATA

Journal Article · · Astronomical Journal (Online)
;  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8]; ;  [9];  [10];  [11];  [12];
  1. Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112 (United States)
  2. Laboratoire dástrophysique, Ecole Polytechnique Fédérale de Lausanne Observatoire de Sauverny, 1290 Versoix (Switzerland)
  3. Institute of Cosmology and Gravitation, Dennis Sciama Building, University of Portsmouth, Portsmouth, PO1 3FX (United Kingdom)
  4. Bruce and Astrid McWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213 (United States)
  5. Instituto de Física Teórica, (UAM/CSIC), Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid (Spain)
  6. Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195 (United States)
  7. CEA, Centre de Saclay, Irfu/SPP, F-91191 Gif-sur-Yvette (France)
  8. APC, University of Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cite (France)
  9. Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720 (United States)
  10. Department of Physics and Astronomy, Vanderbilt University, PMB 401807, 2401 Vanderbilt Place, Nashville, TN 37240 (United States)
  11. University of Wisconsin-Madison, Department of Astronomy, 475 N. Charter St., Madison WI 53703 (United States)
  12. Apache Point Observatory, P.O. Box 59, sunspot, NM 88349 (United States)
+ Show Author Affiliations

In a six-year program started in 2014 July, the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) will conduct novel cosmological observations using the BOSS spectrograph at Apache Point Observatory. These observations will be conducted simultaneously with the Time Domain Spectroscopic Survey (TDSS) designed for variability studies and the Spectroscopic Identification of eROSITA Sources (SPIDERS) program designed for studies of X-ray sources. In particular, eBOSS will measure with percent-level precision the distance-redshift relation with baryon acoustic oscillations (BAO) in the clustering of matter. eBOSS will use four different tracers of the underlying matter density field to vastly expand the volume covered by BOSS and map the large-scale-structures over the relatively unconstrained redshift range 0.6 < z < 2.2. Using more than 250,000 new, spectroscopically confirmed luminous red galaxies at a median redshift z = 0.72, we project that eBOSS will yield measurements of the angular diameter distance d{sub A}(z) to an accuracy of 1.2% and measurements of H(z) to 2.1% when combined with the z > 0.6 sample of BOSS galaxies. With ∼195,000 new emission line galaxy redshifts, we expect BAO measurements of d{sub A}(z) to an accuracy of 3.1% and H(z) to 4.7% at an effective redshift of z = 0.87. A sample of more than 500,000 spectroscopically confirmed quasars will provide the first BAO distance measurements over the redshift range 0.9 < z < 2.2, with expected precision of 2.8% and 4.2% on d{sub A}(z) and H(z), respectively. Finally, with 60,000 new quasars and re-observation of 60,000 BOSS quasars, we will obtain new Lyα forest measurements at redshifts z > 2.1; these new data will enhance the precision of d{sub A}(z) and H(z) at z > 2.1 by a factor of 1.44 relative to BOSS. Furthermore, eBOSS will provide improved tests of General Relativity on cosmological scales through redshift-space distortion measurements, improved tests for non-Gaussianity in the primordial density field, and new constraints on the summed mass of all neutrino species. Here, we provide an overview of the cosmological goals, spectroscopic target sample, demonstration of spectral quality from early data, and projected cosmological constraints from eBOSS.

OSTI ID:
22520011
Journal Information:
Astronomical Journal (Online), Vol. 151, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
Country of Publication:
United States
Language:
English

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The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: measuring the evolution of the growth rate using redshift space distortions between redshift 0.8 and 2.2 text January 2018
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: a tomographic measurement of cosmic structure growth and expansion rate based on optimal redshift weights text January 2018
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: measurement of the growth rate of structure from the anisotropic correlation function between redshift 0.8 and 2.2 text January 2018
The Aemulus Project III: Emulation of the Galaxy Correlation Function text January 2018
Overview of the DESI Legacy Imaging Surveys text January 2018
The VIMOS Public Extragalactic Redshift Survey (VIPERS): Unbiased clustering estimate with VIPERS slit assignment text January 2018
Constraining Sub-Parsec Binary Supermassive Black Holes in Quasars with Multi-Epoch Spectroscopy. III. Candidates from Continued Radial Velocity Tests text January 2018
Imprints of Primordial Non-Gaussianity on Gravitational Wave Spectrum text January 2018
J-PAS: forecasts on interacting dark energy from baryon acoustic oscillations and redshift-space distortions text January 2019
Representation learning for automated spectroscopic redshift estimation text January 2019
The correlations between optical/UV broad lines and X-ray emission for a large sample of quasars text January 2019

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Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABSORPTION SPECTROSCOPY
ACCURACY
BARYONS
COSMIC X-RAY SOURCES
COSMOLOGY
DENSITY
DISTANCE
EMISSION SPECTROSCOPY
GALAXIES
GENERAL RELATIVITY THEORY
LIMITING VALUES
MASS
OSCILLATIONS
QUASARS
RED SHIFT
SPACE