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Supernova / Acceleration Probe: A Satellite Experiment to Study the Nature of the Dark Energy | | SNAP Collaboration: G. Aldering
; W. Althouse
; R. Amanullah
; J. Annis
; P. Astier
; C. Baltay
; E. Barrelet
; S. Basa
; C. Bebek
; L. Bergstrom
; G. Bernstein
; M. Bester
; B. Bigelow
; R. Blandford
; R. Bohlin
; A. Bonissent
; C. Bower
; M. Brown
; M. Campbell
; W. Carithers
; E. Commins
; W. Craig
; C. Day
; F. DeJongh
; S. Deustua
; T. Diehl
; S. Dodelson
; A. Ealet
; R. Ellis
; W. Emmet
; D. Fouchez
; J. Frieman
; A. Fruchter
; D. Gerdes
; L. Gladney
; G. Goldhaber
; A. Goobar
; D. Groom
; H. Heetderks
; M. Hoff
; S. Holland
; M. Huffer
; L. Hui
; D. Huterer
; B. Jain
; P. Jelinsky
; A. Karcher
; S. Kent
; S. Kahn
; A. Kim
; W. Kolbe
; B. Krieger
; G. Kushner
; N. Kuznetsova
; R. Lafever
; J. Lamoureux
; M. Lampton
; O. Le Fevre
; M. Levi
; P. Limon
; H. Lin
; E. Linder
; S. Loken
; W. Lorenzon
; R. Malina
; J. Marriner
; P. Marshall
; R. Massey
; A. Mazure
; T. McKay
; S. McKee
; R. Miquel
; N. Morgan
; E. Mortsell
; N. Mostek
; S. Mufson
; J. Musser
; P. Nugent
; H. Oluseyi
; R. Pain
; N. Palaio
; D. Pankow
; J. Peoples
; S. Perlmutter
; E. Prieto
; D. Rabinowitz
; A. Refregier
; J. Rhodes
; N. Roe
; D. Rusin
; V. Scarpine
; M. Schubnell
; M. Sholl
; G. Smadja
; R. M. Smith
; G. Smoot
; J. Snyder
; A. Spadafora
; A. Stebbins
; C. Stoughton
; A. Szymkowiak
; G. Tarle
; K. Taylor
; A. Tilquin
; A. Tomasch
; D. Tucker
; D. Vincent
; H. von der Lippe
; J-P. Walder
; G. Wang
; W. Wester
; | | Date: |
12 May 2004 | | Subject: | astro-ph | | Abstract: | The Supernova / Acceleration Probe (SNAP) is a proposed space-based experiment designed to study the dark energy and alternative explanations of the acceleration of the Universe’s expansion by performing a series of complementary systematics-controlled measurements. We describe a self-consistent reference mission design for building a Type Ia supernova Hubble diagram and for performing a wide-area weak gravitational lensing study. A 2-m wide-field telescope feeds a focal plane consisting of a 0.7 square-degree imager tiled with equal areas of optical CCDs and near infrared sensors, and a high-efficiency low-resolution integral field spectrograph. The SNAP mission will obtain high-signal-to-noise calibrated light-curves and spectra for several thousand supernovae at redshifts between z=0.1 and 1.7. A wide-field survey covering one thousand square degrees resolves ~100 galaxies per square arcminute. If we assume we live in a cosmological-constant-dominated Universe, the matter density, dark energy density, and flatness of space can all be measured with SNAP supernova and weak-lensing measurements to a systematics-limited accuracy of 1%. For a flat universe, the density-to-pressure ratio of dark energy can be similarly measured to 5% for the present value w0 and ~0.1 for the time variation w’. The large survey area, depth, spatial resolution, time-sampling, and nine-band optical to NIR photometry will support additional independent and/or complementary dark-energy measurement approaches as well as a broad range of auxiliary science programs. (Abridged) | | Source: | arXiv, astro-ph/0405232 | | Services: | Forum | Review | PDF | Favorites | |
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