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

Kyle S. Dawson Jean -Paul Kneib Will J. Percival Shadab Alam Franco D. Albareti Scott F. Anderson Eric Armengaud 1 Eric Aubourg 2 Stephen Bailey Julian E. Bautista Andreas A. Berlind Matthew A. Bershady Florian Beutler Dmitry Bizyaev Michael R. Blanton Michael Blomqvist Adam S. Bolton Jo Boyy W. N. Brandt 3 Jon Brinkmann Joel R. Brownstein Etienne Burtin N. G. Busca 2 Zheng Cai Chia-Hsun Chuang Nicolas Clerc Johan Comparat 4 Frances Cope Rupert A. C. Croft Irene Cruz-Gonzalez Lutz N. Costa Marie-Claude Cousinou 5 Jeremy Darling Axel Macorra Sylvain Torre Timothee Delubac 6 Helion Du Mas Bourboux Tom Dwelly Anne Ealet 5 Daniel J. Eisenstein Michael Eracleous S. Escoffier 5 Xiaohui Fan Alexis Finoguenov 7 Andreu Font-Ribera Peter Frinchaboy Patrick Gaulme 8 Antonis Georgakakis Paul Green Hong Guo 9 Julien Guy 10 Shirley Ho 11 Diana Holder Joe Huehnerhoff Timothy Hutchinson Yipeng Jing Eric Jullo 12 Vikrant Kamble Karen Kinemuchi David Kirkby 13 Francisco-Shu Kitaura Mark A. Klaene Russ R. Laher Dustin Lang Pierre Laurent 14 Jean-Marc Le Goff 14 Cheng Li 15 Yu Liang 16 Marcos Lima 17 Qiufan Lin Weipeng Lin Yen-Ting Lin Daniel C. Long Britt Lundgren Nicholas Macdonald Marcio Antonio Geimba Maia Elena Malanushenko Viktor Malanushenko Vivek Mariappan Cameron K. Mcbride Ian D. Mcgreer Brice Menard Andrea Merloni 18 Andres Meza Antonio D. Montero-Dorta Demitri Muna Adam D. Myers Kirpal Nandra Tracy Naugle Jeffrey A. Newman 19 Pasquier Noterdaeme 20 Peter Nugent Nugentricardo Ogando Matthew D. Olmstead Audrey Oravetz Daniel J. Oravetz Nikhil Padmanabhan Nathalie Palanque-Delabrouille 21 Kaike Pan John K. Parejko Isabelle Pâris 22 John A. Peacock Patrick Petitjean 20 Matthew M. Pieri 12 Alice Pisani 5 Francisco Prada Abhishek Prakash Anand Raichoor 23 Beth Reid James Rich 14 Jethro Ridl Sergio Rodriguez-Torres Aurelio Carnero Rosell Ashley J. Ross Graziano Rossi 21 John Ruan Mara Salvato 7 Conor Sayres Donald P. Schneider David J. Schlegel 24 Uros Seljak Hee-Jong Seo Branimir Sesar Sarah Shandera Yiping Shu Anze Slosar Flavia Sobreira Alina Streblyanska Nao Suzuki Donna Taylor Charling Tao 5 Jeremy L. Tinker Rita Tojeiro Mariana Vargas-Magaña 25 Yuting Wang 26 Benjamin A. Weaver David H. Weinberg Martin White W. M. Wood-Vasey Christophe Yeche 21 Zhongxu Zhai Cheng Zhao 27 Gong-Bo Zhao 28 Zheng Zheng 29 Guangtun Ben Zhu Hu Zou
25 APC - Cosmologie
PCC - Physique Corpusculaire et Cosmologie - Collège de France, APC - UMR 7164 - AstroParticule et Cosmologie
Abstract : 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 \textless z \textless 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(A)(z) to an accuracy of 1.2% and measurements of H(z) to 2.1% when combined with the z \textgreater 0.6 sample of BOSS galaxies. With similar to 195,000 new emission line galaxy redshifts, we expect BAO measurements of d(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 \textless z \textless 2.2, with expected precision of 2.8% and 4.2% on d(A)(z) and H(z), respectively. Finally, with 60,000 new quasars and re-observation of 60,000 BOSS quasars, we will obtain new Lya forest measurements at redshifts z \textgreater 2.1; these new data will enhance the precision of d(A)(z) and H(z) at z \textgreater 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.
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Astronomical Journal, American Astronomical Society, 2016, 151 (2), 〈10.3847/0004-6256/151/2/44〉
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Soumis le : jeudi 19 janvier 2017 - 13:42:31
Dernière modification le : jeudi 7 février 2019 - 17:03:32

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Kyle S. Dawson, Jean -Paul Kneib, Will J. Percival, Shadab Alam, Franco D. Albareti, et al.. THE SDSS-IV EXTENDED BARYON OSCILLATION SPECTROSCOPIC SURVEY: OVERVIEW AND EARLY DATA. Astronomical Journal, American Astronomical Society, 2016, 151 (2), 〈10.3847/0004-6256/151/2/44〉. 〈hal-01440706〉

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