A test of the nature of cosmic acceleration using galaxy redshift distortions

Guzzo, L.; Pierleoni, M.; Meneux, B.; Branchini, E.; Fèvre, O. Le; Marinoni, C.; Garilli, B.; Blaizot, J.; De Lucia, G.; Pollo, A.; McCracken, H. J.; Bottini, D.; Brun, V. Le; Maccagni, D.; Picat, J. P.; Scaramella, R.; Scodeggio, M.; Tresse, L.; Vettolani, G.; Zanichelli, A.; Adami, C.; Arnouts, S.; Bardelli, S.; Bolzonella, M.; Bongiorno, A.; Cappi, A.; Charlot, S.; Ciliegi, P.; Contini, T.; Cucciati, O.; de la Torre, S.; Dolag, K.; Foucaud, S.; Franzetti, P.; Gavignaud, I.; Ilbert, O.; Iovino, A.; Lamareille, F.; Marano, B.; Mazure, A.; Memeo, P.; Merighi, R.; Moscardini, L.; Paltani, S.; Pellò, R.; Perez-Montero, E.; Pozzetti, L.; Radovich, M.; Vergani, D.; Zamorani, G.; Zucca, E.

A test of the nature of cosmic acceleration using galaxy redshift distortions

L. Guzzo (), M. Pierleoni, B. Meneux, E. Branchini, O. Le Fèvre, C. Marinoni, B. Garilli, J. Blaizot, G. De Lucia, A. Pollo, H. J. McCracken, D. Bottini, V. Le Brun, D. Maccagni, J. P. Picat, R. Scaramella, M. Scodeggio, L. Tresse, G. Vettolani, A. Zanichelli, C. Adami, S. Arnouts, S. Bardelli, M. Bolzonella, A. Bongiorno, A. Cappi, S. Charlot, P. Ciliegi, T. Contini, O. Cucciati, S. de la Torre, K. Dolag, S. Foucaud, P. Franzetti, I. Gavignaud, O. Ilbert, A. Iovino, F. Lamareille, B. Marano, A. Mazure, P. Memeo, R. Merighi, L. Moscardini, S. Paltani, R. Pellò, E. Perez-Montero, L. Pozzetti, M. Radovich, D. Vergani, G. Zamorani and E. Zucca
Additional contact information
L. Guzzo: INAF–Osservatorio Astronomico di Brera, Via Bianchi 46, I-23807 Merate (LC), Italy
M. Pierleoni: Max Planck Institut für Astrophysik,
B. Meneux: INAF–IASF, Via Bassini 15, I-20133, Milano, Italy
E. Branchini: Universitá Roma III, Via della Vasca Navale 84, I-00146 Roma, Italy
O. Le Fèvre: Laboratoire d’Astrophysique de Marseille, UMR6110, CNRS-Université de Provence, BP8, F-13376 Marseille cedex 12, France
C. Marinoni: Centre de Physique Theorique, UMR 6207 CNRS-Université de Provence, F-13288 Marseille, France
B. Garilli: INAF–IASF, Via Bassini 15, I-20133, Milano, Italy
J. Blaizot: Max Planck Institut für Astrophysik,
G. De Lucia: Max Planck Institut für Astrophysik,
A. Pollo: Laboratoire d’Astrophysique de Marseille, UMR6110, CNRS-Université de Provence, BP8, F-13376 Marseille cedex 12, France
H. J. McCracken: Institut d’Astrophysique de Paris, UMR 7095, 98 bis Bvd Arago,
D. Bottini: INAF–IASF, Via Bassini 15, I-20133, Milano, Italy
V. Le Brun: Laboratoire d’Astrophysique de Marseille, UMR6110, CNRS-Université de Provence, BP8, F-13376 Marseille cedex 12, France
D. Maccagni: INAF–IASF, Via Bassini 15, I-20133, Milano, Italy
J. P. Picat: Laboratoire d’Astrophysique de l’Observatoire Midi-Pyrénées (UMR 5572), 14 avenue E. Belin, F-31400 Toulouse, France
R. Scaramella: INAF–IRA, Via Gobetti 101, I-40129 Bologna, Italy
M. Scodeggio: INAF–IASF, Via Bassini 15, I-20133, Milano, Italy
L. Tresse: Laboratoire d’Astrophysique de Marseille, UMR6110, CNRS-Université de Provence, BP8, F-13376 Marseille cedex 12, France
G. Vettolani: INAF–IRA, Via Gobetti 101, I-40129 Bologna, Italy
A. Zanichelli: INAF–IRA, Via Gobetti 101, I-40129 Bologna, Italy
C. Adami: Laboratoire d’Astrophysique de Marseille, UMR6110, CNRS-Université de Provence, BP8, F-13376 Marseille cedex 12, France
S. Arnouts: Laboratoire d’Astrophysique de Marseille, UMR6110, CNRS-Université de Provence, BP8, F-13376 Marseille cedex 12, France
S. Bardelli: INAF–Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
M. Bolzonella: INAF–Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
A. Bongiorno: Università di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
A. Cappi: INAF–Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
S. Charlot: Institut d’Astrophysique de Paris, UMR 7095, 98 bis Bvd Arago,
P. Ciliegi: INAF–Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
T. Contini: Laboratoire d’Astrophysique de l’Observatoire Midi-Pyrénées (UMR 5572), 14 avenue E. Belin, F-31400 Toulouse, France
O. Cucciati: INAF–Osservatorio Astronomico di Brera, Via Bianchi 46, I-23807 Merate (LC), Italy
S. de la Torre: Laboratoire d’Astrophysique de Marseille, UMR6110, CNRS-Université de Provence, BP8, F-13376 Marseille cedex 12, France
K. Dolag: Max Planck Institut für Astrophysik,
S. Foucaud: School of Physics and Astronomy, University of Nottingham, University Park
P. Franzetti: INAF–IASF, Via Bassini 15, I-20133, Milano, Italy
I. Gavignaud: Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany
O. Ilbert: Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, Hawaii 96822, USA
A. Iovino: INAF–Osservatorio Astronomico di Brera, Via Bianchi 46, I-23807 Merate (LC), Italy
F. Lamareille: INAF–Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
B. Marano: Università di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
A. Mazure: Laboratoire d’Astrophysique de Marseille, UMR6110, CNRS-Université de Provence, BP8, F-13376 Marseille cedex 12, France
P. Memeo: INAF–IASF, Via Bassini 15, I-20133, Milano, Italy
R. Merighi: INAF–Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
L. Moscardini: Università di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
S. Paltani: Geneva Observatory, ch. des Maillettes 51, CH-1290 Sauverny, Switzerland
R. Pellò: Laboratoire d’Astrophysique de l’Observatoire Midi-Pyrénées (UMR 5572), 14 avenue E. Belin, F-31400 Toulouse, France
E. Perez-Montero: Laboratoire d’Astrophysique de l’Observatoire Midi-Pyrénées (UMR 5572), 14 avenue E. Belin, F-31400 Toulouse, France
L. Pozzetti: INAF–Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
M. Radovich: INAF–Osservatorio Astronomico di Capodimonte, Via Moiariello 16 I-80131, Napoli, Italy
D. Vergani: INAF–IASF, Via Bassini 15, I-20133, Milano, Italy
G. Zamorani: INAF–Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy
E. Zucca: INAF–Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy

Nature, 2008, vol. 451, issue 7178, 541-544

Abstract: A glimpse of dark energy Cosmologists can tell from observing distant supernovae that the Universe is undergoing a phase of accelerated expansion, but the physical cause remains a mystery. The favoured explanation requires huge amounts of invisible 'dark energy', distributed across the Universe, forcing expansion via gravitational repulsion. A new survey of redshift distortions of thousands of faint galaxies provides hints as to the nature of dark-energy induced cosmic acceleration. The distortion at a redshift of z = 0.8 is consistent with the standard cosmological-constant model with low matter density and flat geometry. The current error bars are too large to distinguish among alternative origins for the accelerated expansion, but the next generation of galactic surveys, more powerful and far-reaching than the current crop, should provide much tighter constraints on the properties of dark energy.

Date: 2008
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DOI: 10.1038/nature06555

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