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SPACE : the spectroscopic all-sky cosmic explorer.

Cimatti, A. and Robberto, M. and Baugh, C. and Beckwith, S. V. W. and Content, R. and Daddi, E. and De Lucia, G. and Garilli, B. and Guzzo, L. and Kauffmann, G. and Lehnert, M. and Maccagni, D. and Martínez-Sansigre, A. and Pasian, F. and Reid, I. N. and Rosati, P. and Salvaterra, R. and Stiavelli, M. and Wang, Y. and Zapatero Osorio, M. and Balcells, M. and Bersanelli, M. and Bertoldi, F. and Blaizot, J. and Bottini, D. and Bower, R. and Bulgarelli, A. and Burgasser, A. and Burigana, C. and Butler, R. C. and Casertano, S. and Ciardi, B. and Cirasuolo, M. and Clampin, M. and Cole, Shaun and Comastri, A. and Cristiani, S. and Cuby, J. G. and Cuttaia, F. and de Rosa, A. and Sanchez, A. D. and di Capua, M. and Dunlop, J. and Fan, X. and Ferrara, A. and Finelli, F. and Franceschini, A. and Franx, M. and Franzetti, P. and Frenk, C. and Gardner, J. P. and Gianotti, F. and Grange, R. and Gruppioni, C. and Gruppuso, A. and Hammer, F. and Hillenbrand, L. and Jacobsen, A. and Jarvis, M. and Kennicutt, R. and Kimble, R. and Kriek, M. and Kurk, J. and Kneib, J. P. and Le Fevre, O. and Macchetto, D. and MacKenty, J. and Madau, P. and Magliocchetti, M. and Maino, D. and Mandolesi, N. and Masetti, N. and McLure, R. and Mennella, A. and Meyer, M. and Mignoli, M. and Mobasher, B. and Molinari, E. and Morgante, G. and Morris, S. and Nicastro, L. and Oliva, E. and Padovani, P. and Palazzi, E. and Paresce, F. and Perez Garrido, A. and Pian, E. and Popa, L. and Postman, M. and Pozzetti, L. and Rayner, J. and Rebolo, R. and Renzini, A. and Röttgering, H. and Schinnerer, E. and Scodeggio, M. and Saisse, M. and Shanks, T. and Shapley, A. and Sharples, R.M. and Shea, H. and Silk, J. and Smail, I. and Spanó, P. and Steinacker, J. and Stringhetti, L. and Szalay, A. and Tresse, L. and Trifoglio, M. and Urry, M. and Valenziano, L. and Villa, F. and Villo Perez, I. and Walter, F. and Ward, M. and White, R. and White, S. and Wright, E. and Wyse, R. and Zamorani, G. and Zacchei, A. and Zeilinger, W. W. and Zerbi, F. (2009) 'SPACE : the spectroscopic all-sky cosmic explorer.', Experimental astronomy., 23 (1). pp. 39-66.


We describe the scientific motivations, the mission concept and the instrumentation of SPACE, a class-M mission proposed for concept study at the first call of the ESA Cosmic-Vision 2015–2025 planning cycle. SPACE aims to produce the largest three-dimensional evolutionary map of the Universe over the past 10 billion years by taking near-IR spectra and measuring redshifts for more than half a billion galaxies at 0 < z < 2 down to AB ∼ 23 over 3π sr of the sky. In addition, SPACE will also target a smaller sky field, performing a deep spectroscopic survey of millions of galaxies to AB ∼ 26 and at 2 < z < 10+. These goals are unreachable with ground-based observations due to the ≈500 times higher sky background (see e.g. Aldering, LBNL report number LBNL-51157, 2001). To achieve the main science objectives, SPACE will use a 1.5 m diameter Ritchey- Chretien telescope equipped with a set of arrays of Digital Micro-mirror Devices covering a total field of view of 0.4 deg2, and will perform large-multiplexing multi-object spectroscopy (e.g. ≈6000 targets per pointing) at a spectral resolution of R∼400 as well as diffraction-limited imaging with continuous coverage from 0.8 to 1.8 μm. Owing to the depth, redshift range, volume coverage and quality of its spectra, SPACE will reveal with unique sensitivity most of the fundamental cosmological signatures, including the power spectrum of density fluctuations and its turnover. SPACE will also place high accuracy constraints on the dark energy equation of state parameter and its evolution by measuring the baryonic acoustic oscillations imprinted when matter and radiation decoupled, the distanceluminosity relation of cosmological supernovae, the evolution of the cosmic expansion rate, the growth rate of cosmic large-scale structure, and high-z galaxy clusters. The datasets from the SPACE mission will represent a long lasting legacy for the whole astronomical community whose data will be mined for many years to come.

Item Type:Article
Keywords:Observational cosmology, Dark energy, Astronomical and space-research instrumentation.
Full text:PDF - Accepted Version (1056Kb)
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Record Created:20 Apr 2012 12:50
Last Modified:21 May 2014 15:10

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