The Dark Energy Survey
The discovery that the universe is accelerating, not slowing down from the mass it contains, is the surprise that sets the initial research program of 21st Century cosmology. The Dark Energy Survey is a next generation sky survey aimed directly at understanding this mystery. We will build an extreme...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.212.7991 2023-05-15T18:23:06+02:00 The Dark Energy Survey Ignacio Sevilla The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.212.7991 http://pos.sissa.it/archive/conferences/084/112/EPS-HEP%202009_112.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.212.7991 http://pos.sissa.it/archive/conferences/084/112/EPS-HEP%202009_112.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pos.sissa.it/archive/conferences/084/112/EPS-HEP%202009_112.pdf text 2009 ftciteseerx 2016-01-07T17:56:47Z The discovery that the universe is accelerating, not slowing down from the mass it contains, is the surprise that sets the initial research program of 21st Century cosmology. The Dark Energy Survey is a next generation sky survey aimed directly at understanding this mystery. We will build an extremely red sensitive 500 Megapixel camera, with a 1 meter diameter, 2.2 degree field of view prime focus corrector, and a data acquisition system fast enough to take images in 17 seconds. The cage containing the system mounts at the prime focus of the Blanco 4-meter telescope at Cerro Tololo Interamerican Observatory (CTIO) in Chile. Over 5 years we will use 30 % of the available time on the telescope to pursue a high precision multi-bandpass wide area survey, designed to produce photometric redshifts from 0.2 < z < 1.3. The survey g,r,i,z,Y data will cover 5000 sq-degrees, with 4000 sq-degrees overlapping the Sunyaev-Zeldovich CMB survey being conducted by the South Pole Telescope. Our 4 science goals aim at extracting cosmological information on the dark energy from 1) cluster counting and spatial distribution of clusters at 0.1 < z < 1.3, 2) the shifting of the galaxy spatial angular power spectra with redshift, 3) weak gravitational lensing measurements on several redshift shells to z ∼ 1, and 4) 2000 type Ia supernovae at 0.3 < z < 0.8. The signature of dark energy being a cosmological constant is that the dark energy density remains constant while the universe expands; technically that w=-1 and that dw/dt = 0. We aim at a 5%-15 % precision measurement in w from each of our experiments, and a 30 % measurement in w’. Combined, they provide both stronger constraints and a check on systematic errors. Text South pole Unknown Blanco ENVELOPE(-55.233,-55.233,-61.250,-61.250) South Pole |
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English |
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The discovery that the universe is accelerating, not slowing down from the mass it contains, is the surprise that sets the initial research program of 21st Century cosmology. The Dark Energy Survey is a next generation sky survey aimed directly at understanding this mystery. We will build an extremely red sensitive 500 Megapixel camera, with a 1 meter diameter, 2.2 degree field of view prime focus corrector, and a data acquisition system fast enough to take images in 17 seconds. The cage containing the system mounts at the prime focus of the Blanco 4-meter telescope at Cerro Tololo Interamerican Observatory (CTIO) in Chile. Over 5 years we will use 30 % of the available time on the telescope to pursue a high precision multi-bandpass wide area survey, designed to produce photometric redshifts from 0.2 < z < 1.3. The survey g,r,i,z,Y data will cover 5000 sq-degrees, with 4000 sq-degrees overlapping the Sunyaev-Zeldovich CMB survey being conducted by the South Pole Telescope. Our 4 science goals aim at extracting cosmological information on the dark energy from 1) cluster counting and spatial distribution of clusters at 0.1 < z < 1.3, 2) the shifting of the galaxy spatial angular power spectra with redshift, 3) weak gravitational lensing measurements on several redshift shells to z ∼ 1, and 4) 2000 type Ia supernovae at 0.3 < z < 0.8. The signature of dark energy being a cosmological constant is that the dark energy density remains constant while the universe expands; technically that w=-1 and that dw/dt = 0. We aim at a 5%-15 % precision measurement in w from each of our experiments, and a 30 % measurement in w’. Combined, they provide both stronger constraints and a check on systematic errors. |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
author |
Ignacio Sevilla |
spellingShingle |
Ignacio Sevilla The Dark Energy Survey |
author_facet |
Ignacio Sevilla |
author_sort |
Ignacio Sevilla |
title |
The Dark Energy Survey |
title_short |
The Dark Energy Survey |
title_full |
The Dark Energy Survey |
title_fullStr |
The Dark Energy Survey |
title_full_unstemmed |
The Dark Energy Survey |
title_sort |
dark energy survey |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.212.7991 http://pos.sissa.it/archive/conferences/084/112/EPS-HEP%202009_112.pdf |
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ENVELOPE(-55.233,-55.233,-61.250,-61.250) |
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Blanco South Pole |
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Blanco South Pole |
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South pole |
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http://pos.sissa.it/archive/conferences/084/112/EPS-HEP%202009_112.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.212.7991 http://pos.sissa.it/archive/conferences/084/112/EPS-HEP%202009_112.pdf |
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