Supernova / Acceleration Probe: A Satellite Experiment to Study the Nature of the Dark Energy
Skip to main content
eScholarship
Open Access Publications from the University of California

Supernova / Acceleration Probe: A Satellite Experiment to Study the Nature of the Dark Energy

  • Author(s): Collaboration, SNAP
  • Aldering, G
  • Althouse, W
  • Amanullah, R
  • Annis, J
  • Astier, P
  • Baltay, C
  • Barrelet, E
  • Basa, S
  • Bebek, C
  • Bergstrom, L
  • Bernstein, G
  • Bester, M
  • Bigelow, B
  • Blandford, R
  • Bohlin, R
  • Bonissent, A
  • Bower, C
  • Brown, M
  • Campbell, M
  • Carithers, W
  • Commins, E
  • Craig, W
  • Day, C
  • DeJongh, F
  • Deustua, S
  • Diehl, T
  • Dodelson, S
  • Ealet, A
  • Ellis, R
  • Emmet, W
  • Fouchez, D
  • Frieman, J
  • Fruchter, A
  • Gerdes, D
  • Gladney, L
  • Goldhaber, G
  • Goobar, A
  • Groom, D
  • Heetderks, H
  • Hoff, M
  • Holland, S
  • Huffer, M
  • Hui, L
  • Huterer, D
  • Jain, B
  • Jelinsky, P
  • Karcher, A
  • Kent, S
  • Kahn, S
  • Kim, A
  • Kolbe, W
  • Krieger, B
  • Kushner, G
  • Kuznetsova, N
  • Lafever, R
  • Lamoureux, J
  • Lampton, M
  • Fevre, OL
  • Levi, M
  • Limon, P
  • Lin, H
  • Linder, E
  • Loken, S
  • Lorenzon, W
  • Malina, R
  • Marriner, J
  • Marshall, P
  • Massey, R
  • Mazure, A
  • McKay, T
  • McKee, S
  • Miquel, R
  • Morgan, N
  • Mortsell, E
  • Mostek, N
  • Mufson, S
  • Musser, J
  • Nugent, P
  • Oluseyi, H
  • Pain, R
  • Palaio, N
  • Pankow, D
  • Peoples, J
  • Perlmutter, S
  • Prieto, E
  • Rabinowitz, D
  • Refregier, A
  • Rhodes, J
  • Roe, N
  • Rusin, D
  • Scarpine, V
  • Schubnell, M
  • Sholl, M
  • Smadja, G
  • Smith, RM
  • Smoot, G
  • Snyder, J
  • Spadafora, A
  • Stebbins, A
  • Stoughton, C
  • Szymkowiak, A
  • Tarle, G
  • Taylor, K
  • Tilquin, A
  • Tomasch, A
  • Tucker, D
  • Vincent, D
  • Lippe, HVD
  • Walder, J-P
  • Wang, G
  • Wester, W
  • et al.
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)

Main Content
Current View