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기술보고서 게시판 내용
타이틀	Evidence for Dark Energy from the Cosmic Microwave Background Alone Using the Atacama Cosmology Telescope Lensing Measurements
저자	Sherwin, Blake D.;; Dunkley, Joanna;; Das, Sudeep;; Appel, John W.;; Bond, J. Richard;; Carvalho, C. Sofia;; Devlin, Mark J.;; Duenner, Rolando;; Essinger-Hileman, Thomas;; Fowler, Joesph J.;; Hajian, Amir;; Halpern, Mark;; Hasselfield, Matthew;; Hincks, Adam D.;; Hlozek, Renee;; Hughes, John P.;; Irwin, Kent D.;; Klein, Jeff;; Kosowsky, Arthur;; Marriage, Tobias A.;; Marsden, Danica;; Moodley, Kavilan;; Menanteau, Felipe;; Niemack, Michael D.;; Wollack, Ed.
Keyword	ASTRONOMICAL MODELS;; COSMIC MICROWAVE BACKGROUND RADIATION;; COSMOLOGY;; DARK ENERGY;; GALACTIC CLUSTERS;; MICROWAVE ANISOTROPY PROBE;; OSCILLATIONS;; POWER SPECTRA;; SOUND WAVES;; TELESCOPES;; TIME MEASUREMENT
URL	http://hdl.handle.net/2060/20110023548
보고서번호	GSFC.JA.5509.2011
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	For the first time, measurements of the cosmic microwave background radiation (CMB) alone favor cosmologies with w = -1 dark energy over models without dark energy at a 3.2-sigma level. We demonstrate this by combining the CMB lensing deflection power spectrum from the Atacama Cosmology Telescope with temperature and polarization power spectra from the "Wilkinson Microwave Anisotropy Probe. The lensing data break the geometric degeneracy of different cosmological models with similar CMB temperature power spectra. Our CMB-only measurement of the dark energy density Omega(delta) confirms other measurements from supernovae, galaxy clusters and baryon acoustic oscillations, and demonstrates the power of CMB lensing as a new cosmological tool.