LIVIVO - Das Suchportal für Lebenswissenschaften

switch to English language
Erweiterte Suche

Suchergebnis

Treffer 1 - 3 von insgesamt 3

Suchoptionen

  1. Artikel ; Online: Integrate US science and diplomacy.

    Banerjee, Amrita / Gray, Lyndsey / Pearson, W Robert / Schmitt, Benjamin L / Shield, Katherine / Zanalda, Giovanni

    Science (New York, N.Y.)

    2021  Band 372, Heft 6542, Seite(n) 582

    Sprache Englisch
    Erscheinungsdatum 2021-05-06
    Erscheinungsland United States
    Dokumenttyp Letter
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abi8644
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  2. Artikel ; Online: Evidence for dark energy from the cosmic microwave background alone using the Atacama Cosmology Telescope lensing measurements.

    Sherwin, Blake D / Dunkley, Joanna / Das, Sudeep / Appel, John W / Bond, J Richard / Carvalho, C Sofia / Devlin, Mark J / Dünner, Rolando / Essinger-Hileman, Thomas / Fowler, Joseph W / Hajian, Amir / Halpern, Mark / Hasselfield, Matthew / Hincks, Adam D / Hlozek, Renée / Hughes, John P / Irwin, Kent D / Klein, Jeff / Kosowsky, Arthur /
    Marriage, Tobias A / Marsden, Danica / Moodley, Kavilan / Menanteau, Felipe / Niemack, Michael D / Nolta, Michael R / Page, Lyman A / Parker, Lucas / Reese, Erik D / Schmitt, Benjamin L / Sehgal, Neelima / Sievers, Jon / Spergel, David N / Staggs, Suzanne T / Swetz, Daniel S / Switzer, Eric R / Thornton, Robert / Visnjic, Katerina / Wollack, Ed

    Physical review letters

    2011  Band 107, Heft 2, Seite(n) 21302

    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 ... ...

    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 Ω(Λ) confirms other measurements from supernovae, galaxy clusters, and baryon acoustic oscillations, and demonstrates the power of CMB lensing as a new cosmological tool.
    Sprache Englisch
    Erscheinungsdatum 2011-07-08
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.107.021302
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  3. Artikel ; Online: Detection of the power spectrum of cosmic microwave background lensing by the Atacama Cosmology Telescope.

    Das, Sudeep / Sherwin, Blake D / Aguirre, Paula / Appel, John W / Bond, J Richard / Carvalho, C Sofia / Devlin, Mark J / Dunkley, Joanna / Dünner, Rolando / Essinger-Hileman, Thomas / Fowler, Joseph W / Hajian, Amir / Halpern, Mark / Hasselfield, Matthew / Hincks, Adam D / Hlozek, Renée / Huffenberger, Kevin M / Hughes, John P / Irwin, Kent D /
    Klein, Jeff / Kosowsky, Arthur / Lupton, Robert H / Marriage, Tobias A / Marsden, Danica / Menanteau, Felipe / Moodley, Kavilan / Niemack, Michael D / Nolta, Michael R / Page, Lyman A / Parker, Lucas / Reese, Erik D / Schmitt, Benjamin L / Sehgal, Neelima / Sievers, Jon / Spergel, David N / Staggs, Suzanne T / Swetz, Daniel S / Switzer, Eric R / Thornton, Robert / Visnjic, Katerina / Wollack, Ed

    Physical review letters

    2011  Band 107, Heft 2, Seite(n) 21301

    Abstract: We report the first detection of the gravitational lensing of the cosmic microwave background through a measurement of the four-point correlation function in the temperature maps made by the Atacama Cosmology Telescope. We verify our detection by ... ...

    Abstract We report the first detection of the gravitational lensing of the cosmic microwave background through a measurement of the four-point correlation function in the temperature maps made by the Atacama Cosmology Telescope. We verify our detection by calculating the levels of potential contaminants and performing a number of null tests. The resulting convergence power spectrum at 2° angular scales measures the amplitude of matter density fluctuations on comoving length scales of around 100 Mpc at redshifts around 0.5 to 3. The measured amplitude of the signal agrees with Lambda cold dark matter cosmology predictions. Since the amplitude of the convergence power spectrum scales as the square of the amplitude of the density fluctuations, the 4σ detection of the lensing signal measures the amplitude of density fluctuations to 12%.
    Sprache Englisch
    Erscheinungsdatum 2011-07-08
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.107.021301
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

Zum Seitenanfang