The WiggleZ Dark Energy Survey: measuring the cosmic expansion history using the Alcock-Paczynski test and distant supernovae

被引：124

作者：

Blake, Chris ^{[1
]}

Glazebrook, Karl ^{[1
]}

Davis, Tamara M. ^{[2
,3
]}

Brough, Sarah ^{[4
]}

Colless, Matthew ^{[4
]}

Contreras, Carlos ^{[1
]}

Couch, Warrick ^{[1
]}

Croom, Scott ^{[5
]}

Drinkwater, Michael J. ^{[2
]}

Forster, Karl ^{[6
]}

Gilbank, David ^{[7
]}

Gladders, Mike ^{[8
]}

Jelliffe, Ben ^{[5
]}

Jurek, Russell J. ^{[9
]}

Li, I-hui ^{[1
]}

Madore, Barry ^{[10
]}

Martin, D. Christopher ^{[6
]}

Pimbblet, Kevin ^{[11
]}

Poole, Gregory B. ^{[1
]}

Pracy, Michael ^{[1
,12
]}

Sharp, Rob ^{[2
,12
]}

Wisnioski, Emily ^{[1
]}

Woods, David ^{[13
]}

Wyder, Ted K. ^{[6
]}

Yee, H. K. C. ^{[14
]}

机构：

[1] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[2] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[3] Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen O, Denmark

[4] Australian Astron Observ, Epping, NSW 1710, Australia

[5] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia

[6] CALTECH, Pasadena, CA 91125 USA

[7] Univ Waterloo, Dept Phys & Astron, Astrophys & Gravitat Grp, Waterloo, ON N2L 3G1, Canada

[8] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[9] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia

[10] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA

[11] Monash Univ, Sch Phys, Clayton, Vic 3800, Australia

[12] Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia

[13] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[14] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2011年 / 418卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

surveys; dark energy; distance scale; DIGITAL SKY SURVEY; BARYON ACOUSTIC-OSCILLATIONS; BVRI LIGHT CURVES; REDSHIFT-SPACE; COSMOLOGICAL MODEL; POWER-SPECTRUM; IA SUPERNOVAE; UNIVERSE; CONSTRAINTS; EVOLUTION;

D O I：

10.1111/j.1365-2966.2011.19606.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Astronomical observations suggest that todays Universe is dominated by a dark energy of unknown physical origin. One of the most notable results obtained from many models is that dark energy should cause the expansion of the Universe to accelerate: but the expansion rate as a function of time has proved very difficult to measure directly. We present a new determination of the cosmic expansion history by combining distant supernovae observations with a geometrical analysis of large-scale galaxy clustering within the WiggleZ Dark Energy Survey, using the AlcockPaczynski test to measure the distortion of standard spheres. Our result constitutes a robust and non-parametric measurement of the Hubble expansion rate as a function of time, which we measure with 1015 per cent precision in four bins within the redshift range 0.1 < z < 0.9. We demonstrate, in a manner insensitive to the assumed cosmological model, that the cosmic expansion is accelerating. Furthermore, we find that this expansion history is consistent with a cosmological-constant dark energy.

引用

页码：1725 / 1735

页数：11

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