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A high resolution measurement of temperature anisotropies in the cosmic microwave background radiation with the complete ACBAR data set

Citation

Reichardt, Christian L (2008) A high resolution measurement of temperature anisotropies in the cosmic microwave background radiation with the complete ACBAR data set. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-12202007-130152

Abstract

The Arcminute Cosmology Bolometer Array Receiver (ACBAR) is a 16-element spiderweb bolometer array operating at 150 GHz. Mounted on the 2.1m Viper telescope, ACBAR has dedicated four years to cosmic microwave background (CMB) observations at the South Pole. We describe the focal plane reconstruction and performance of ACBAR for the 2005 austral winter. We present a new CMB temperature anisotropy power spectrum for the complete ACBAR data set. The addition of data from the 2005 observing season expands the data set by 210%; and the sky coverage by 490%; over the previous ACBAR releases. The expanded data set allows us to derive a new set of band-power measurements with finer [italic l]-resolution and dramatically smaller uncertainties. In particular, the band-power uncertainties have been reduced by more than a factor of two on angular scales encompassing the third and fourth acoustic peaks and the damping tail of the CMB power spectrum. The calibration has been significantly improved from 6%; to 2.2%; in temperature by using a direct comparison between CMB anisotropy maps measured by WMAP3 and ACBAR to transfer the WMAP dipole-based calibration to ACBAR. The resulting power spectrum is consistent with theoretical predications for a spatially flat, dark energy-dominated Lambda CDM cosmology.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:cosmic microwave background; cosmology; observations; South Pole
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Lange, Andrew E.
Thesis Committee:
  • Lange, Andrew E. (chair)
  • Harrison, Fiona A.
  • Kamionkowski, Marc P.
  • Golwala, Sunil
Defense Date:19 December 2007
Record Number:CaltechETD:etd-12202007-130152
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-12202007-130152
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5090
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:16 Jan 2008
Last Modified:26 Dec 2012 03:14

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