The WiggleZ Dark Energy Survey: the growth rate of cosmic structure since redshift z=0.9
Chris Blake,Sarah Brough,Matthew Colless,Carlos Contreras,Warrick J. Couch,Scott M. Croom,Tamara M. Davis,Tamara M. Davis,Michael J. Drinkwater,Karl Forster,David Gilbank,Michael D. Gladders,Karl Glazebrook,Ben Jelliffe,Russell J. Jurek,I-hui Li,Barry F. Madore,D. Christopher Martin,Kevin A. Pimbblet,Gregory B. Poole,Michael Pracy,Michael Pracy,Rob Sharp,Rob Sharp,Emily Wisnioski,David Woods,Ted K. Wyder,Howard K. C. Yee +27 more
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TLDR
In this article, the power spectrum of the velocity divergence field, P_(θθ) (k), was extracted from the WiggleZ Dark Energy Survey and compared with several different models of the quasi-linear growth of structure including empirical models, fitting formulae calibrated to N-body simulations and perturbation theory techniques.Abstract:
We present precise measurements of the growth rate of cosmic structure for the redshift range 0.1 < z < 0.9, using redshift-space distortions in the galaxy power spectrum of the WiggleZ Dark Energy Survey. Our results, which have a precision of around 10 per cent in four
independent redshift bins, are well fitted by a flat Λ cold dark matter (ΛCDM) cosmological model with matter density parameter Ω_m = 0.27. Our analysis hence indicates that this model provides a self-consistent description of the growth of cosmic structure through large-scale
perturbations and the homogeneous cosmic expansion mapped by supernovae and baryon acoustic oscillations. We achieve robust results by systematically comparing our data with
several different models of the quasi-linear growth of structure including empirical models, fitting formulae calibrated to N-body simulations, and perturbation theory techniques. We extract the first measurements of the power spectrum of the velocity divergence field, P_(θθ) (k),
as a function of redshift (under the assumption that P_(gθ) (k) = − √P_(gg)(k)P_(θθ) (k), where g is the galaxy overdensity field), and demonstrate that the WiggleZ galaxy–mass cross-correlation is consistent with a deterministic (rather than stochastic) scale-independent bias model for WiggleZ galaxies for scales k < 0.3 h Mpc^(−1). Measurements of the cosmic growth rate from
the WiggleZ Survey and other current and future observations offer a powerful test of the physical nature of dark energy that is complementary to distance–redshift measures such as supernovae and baryon acoustic oscillations.read more
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Posted Content
The DESI Experiment Part I: Science,Targeting, and Survey Design
Amir Aghamousa,Jessica Aguilar,S. P. Ahlen,Shadab Alam,Lori E. Allen,Carlos Allende Prieto,James Annis,Stephen Bailey,Christophe Balland,O. Ballester,C. Baltay,Lucas Beaufore,Chris Bebek,Timothy C. Beers,Eric F. Bell,José Luis Bernal,Robert Besuner,Florian Beutler,Chris Blake,Hannes Bleuler,Michael Blomqvist,Robert Blum,Adam S. Bolton,Cesar Briceno,David J. Brooks,Joel R. Brownstein,E. Buckley-Geer,Angela Burden,Etienne Burtin,Nicolás G. Busca,Robert N. Cahn,Yan-Chuan Cai,Laia Cardiel-Sas,Raymond G. Carlberg,P. H. Carton,Ricard Casas,Francisco J. Castander,Jorge L. Cervantes-Cota,Todd M. Claybaugh,Madeline Close,Carl T. Coker,Shaun Cole,Johan Comparat,Andrew Cooper,M. C. Cousinou,Martin Crocce,Jean-Gabriel Cuby,Daniel P. Cunningham,Tamara M. Davis,Kyle S. Dawson,Axel de la Macorra,Juan de Vicente,Timothée Delubac,Mark Derwent,Arjun Dey,G. Dhungana,Zhejie Ding,Peter Doel,Yutong Duan,Anne Ealet,Jerry Edelstein,Sarah Eftekharzadeh,Daniel J. Eisenstein,Ann Elliott,Stephanie Escoffier,Matthew Evatt,Parker Fagrelius,Xiaohui Fan,Kevin Fanning,Arya Farahi,Jay Farihi,Ginevra Favole,Yu Feng,Enrique Fernández,Joseph R. Findlay,Douglas P. Finkbeiner,J. Michael Fitzpatrick,B. Flaugher,Samuel Flender,Andreu Font-Ribera,Jaime E. Forero-Romero,Pablo Fosalba,Carlos S. Frenk,Michele Fumagalli,Boris T. Gaensicke,Giuseppe Gallo,Juan Garcia-Bellido,Enrique Gaztanaga,Nicola Pietro Gentile Fusillo,Terry Gerard,Irena Gershkovich,Tommaso Giannantonio,Denis Gillet,Guillermo Gonzalez-de-Rivera,Violeta Gonzalez-Perez,Shelby Gott,Or Graur,G. Gutierrez,Julien Guy,Salman Habib,H. Heetderks,Ian Heetderks,Katrin Heitmann,Wojciech A. Hellwing,David Herrera,Shirley Ho,Stephen T. Holland,K. Honscheid,E. M. Huff,Timothy A. Hutchinson,Dragan Huterer,Ho Seong Hwang,Joseph Maria Illa Laguna,Yuzo Ishikawa,Dianna Jacobs,Niall Jeffrey,Patrick Jelinsky,Elise Jennings,Linhua Jiang,Jorge Jiménez,Jennifer A. Johnson,Richard Joyce,Eric Jullo,Stéphanie Juneau,Sami Kama,Armin Karcher,S. Karkar,Robert Kehoe,Noble Kennamer,Stephen B. H. Kent,Martin Kilbinger,Alex G. Kim,D. Kirkby,Theodore Kisner,Ellie Kitanidis,Jean-Paul Kneib,Sergey E. Koposov,Eve Kovacs,Kazuya Koyama,A. Kremin,Richard G. Kron,Luzius Kronig,Andrea Kueter-Young,Cedric G. Lacey,R. Lafever,Ofer Lahav,A. Lambert,Michael Lampton,Martin Landriau,Dustin Lang,Tod R. Lauer,Jean-Marc Le Goff,Laurent Le Guillou,Auguste Le Van Suu,Jae Hyeon Lee,Su-Jeong Lee,Daniela Leitner,Michael Lesser,Michael Levi,Benjamin L'Huillier,Baojiu Li,Ming Liang,Huan Lin,Eric V. Linder,Sarah Loebman,Zarija Lukić,Jun Ma,Niall MacCrann,Christophe Magneville,Laleh Makarem,Marc Manera,Christopher J. Manser,Robert Marshall,Paul Martini,Richard Massey,Thomas Matheson,Jeremy McCauley,Patrick McDonald,Ian D. McGreer,Aaron Meisner,Nigel Metcalfe,Timothy N. Miller,Ramon Miquel,John Moustakas,Adam D. Myers,Milind Naik,Jeffrey A. Newman,Robert C. Nichol,Andrina Nicola,Luiz Nicolati da Costa,Jundan Nie,Gustavo Niz,Peder Norberg,Brian Nord,Dara Norman,Peter Nugent,Thomas P. O'Brien,Minji Oh,Knut Olsen,Cristobal Padilla,Hamsa Padmanabhan,Nikhil Padmanabhan,Nathalie Palanque-Delabrouille,Antonella Palmese,Daniel Pappalardo,Isabelle Pâris,Changbom Park,Anna Patej,John A. Peacock,Hiranya V. Peiris,Xiyan Peng,Will J. Percival,S. Perruchot,Matthew M. Pieri,Richard W. Pogge,Jennifer E. Pollack,Claire Poppett,Francisco Prada,Abhishek Prakash,Ronald G. Probst,David Rabinowitz,Anand Raichoor,Chang H. Ree,Alexandre Refregier,X. Regal,Beth Reid,Kevin Reil,Mehdi Rezaie,Constance M. Rockosi,Natalie A. Roe,Samuel Ronayette,A. Roodman,Ashley J. Ross,Nicholas P. Ross,Graziano Rossi,Eduardo Rozo,V. Ruhlmann-Kleider,Eli S. Rykoff,Cristiano G. Sabiu,Lado Samushia,E. J. Sanchez,Javier Sanchez,David J. Schlegel,Michael Schneider,Michael Schubnell,A. Secroun,Uroš Seljak,Hee-Jong Seo,Santiago Serrano,Arman Shafieloo,Huanyuan Shan,Ray M. Sharples,Michael Sholl,William V. Shourt,Joseph H. Silber,David R. Silva,Martin M. Sirk,Anze Slosar,Alex Smith,George F. Smoot,Debopam Som,Yong-Seon Song,David Sprayberry,Ryan Staten,A. Stefanik,Gregory Tarlé,Suk Sien Tie,Jeremy L. Tinker,Rita Tojeiro,Francisco Valdes,Octavio Valenzuela,Monica Valluri,Mariana Vargas-Magaña,Licia Verde,Alistair R. Walker,Jiali Wang,Yuting Wang,Benjamin A. Weaver,Curtis Weaverdyck,Risa H. Wechsler,David H. Weinberg,Martin White,Qian Yang,Christophe Yèche,Tianmeng Zhang,Gong-Bo Zhao,Yi Zheng,Xu Zhou,Zhimin Zhou,Yaling Zhu,Hu Zou,Ying Zu +291 more
TL;DR: DESI as discussed by the authors is a ground-based dark energy experiment that will study baryon acoustic oscillations (BAO) and the growth of structure through redshift-space distortions with a wide-area galaxy and quasar redshift survey.
Journal ArticleDOI
The WiggleZ Dark Energy Survey: joint measurements of the expansion and growth history at z < 1
Chris Blake,Sarah Brough,Matthew Colless,Carlos Contreras,Warrick J. Couch,Scott M. Croom,Darren J. Croton,Tamara M. Davis,Michael J. Drinkwater,Karl Forster,David Gilbank,Michael D. Gladders,Karl Glazebrook,Ben Jelliffe,Russell J. Jurek,I-hui Li,Barry F. Madore,D. Christopher Martin,Kevin A. Pimbblet,Gregory B. Poole,Michael Pracy,Rob Sharp,Rob Sharp,Emily Wisnioski,David Woods,Ted K. Wyder,Howard K. C. Yee +26 more
TL;DR: In this paper, the authors performed a joint determination of the distance-redshift relation and cosmic expansion rate at redshifts z = 0.44, 0.6 and 0.73 by combining measurements of the baryon acoustic peak and Alcock-Paczynski distortion from galaxy clustering in the WiggleZ Dark Energy Survey, using a large ensemble of mock catalogues to calculate the covariance between the measurements.
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