Cmb Observations Using the Ska
نویسندگان
چکیده
We examine the prospects for observations of CMB anisotropy with the SKA; we discuss the advantages of interferometric SKA imaging, observing strategies, calibration issues and the achievable sensitivity. Although the SKA will probably operate at cm wavelengths, where discrete source confusion dominates the CMB anisotropy, its extreme sensitivity to point sources will make it possible to subtract the source contamination at these wavelengths and thereby image the low surface brightness CMB anisotropies on small angular scales. The SKA, operating at 10-20 GHz, may usefully make high-l observations of the CMB anisotropy spectrum and survey the sky for Sunyaev-Zeldovich decrements.
منابع مشابه
SKA Key science project: Radio observations of cosmic reionization and first light
I update the SKA key science program (KSP) on first light and cosmic reionization. The KSP has two themes: (i) Using the 21cm line of neutral hydrogen as the most direct probe into the evolution of the neutral intergalactic medium during cosmic reionization. Such HI 21cm studies are potentially the most important new window on cosmology since the discovery of the CMB. (ii) Observing the gas, du...
متن کاملCosmic Microwave Background at low frequencies
The next generation low-frequency radio telescopes may probe cosmological models by means of observations of the cosmic microwave background (CMB). I discuss the prospects for observations of CMB imprints — recombination lines from the epoch of recombination, μ distortions and angular temperature anisotropies — at low frequencies. A future low-frequency radio telescope, like the proposed SKA, m...
متن کاملDetermining neutrino properties with the SKA
Current measurements of cosmic large-scale structure (LSS) are able to place an ∼ 1 eV upper limit on the absolute mass scale of neutrinos. A factor ∼ 20 improvement in mass sensitivity, together with an insensitivity to systematic effects, is needed to reach the lowest value allowed by particle physics experiments. We consider here the prospects of determining the neutrino mass scale, the numb...
متن کاملForecasts for Dark Energy Measurements with Future HI Surveys
We use two independent methods to forecast the dark energy measurements achievable by combining future galaxy redshift surveys based on the radio HI emission line with Cosmic Microwave Background (CMB) data from the Planck satellite. In the first method we focus on the ‘standard ruler’ provided by the baryon acoustic oscillation (BAO) length scale. In the second method we utilize additional inf...
متن کاملDetermining neutrino properties using future galaxy redshift surveys
Current measurements of the large-scale structure of galaxies are able to place an ∼ 0.5 eV upper limit on the absolute mass scale of neutrinos. An order-of-magnitude improvement in raw sensitivity, together with an insensitivity to systematic effects, is needed to reach the lowest value allowed by particle physics experiments. We consider the prospects of determining both the neutrino mass sca...
متن کامل