316 results found
Aghanim N, Armitage-Caplan C, Arnaud M, et al., 2014, Planck 2013 results. III. LFI systematic uncertainties, ASTRONOMY & ASTROPHYSICS, Vol: 571, ISSN: 1432-0746
Aghanim N, Armitage-Caplan C, Arnaud M, et al., 2014, Planck 2013 results. IV. Low Frequency Instrument beams and window functions, ASTRONOMY & ASTROPHYSICS, Vol: 571, ISSN: 1432-0746
André P, Baccigalupi C, Banday A, et al., 2014, PRISM (Polarized Radiation Imaging and Spectroscopy Mission): An extended white paper, Journal of Cosmology and Astroparticle Physics, Vol: 2014
PRISM (Polarized Radiation Imaging and Spectroscopy Mission) was proposed to ESA in May 2013 as a large-class mission for investigating within the framework of the ESA Cosmic Vision program a set of important scientific questions that require high resolution, high sensitivity, full-sky observations of the sky emission at wavelengths ranging from millimeter-wave to the far-infrared. PRISM's main objective is to explore the distant universe, probing cosmic history from very early times until now as well as the structures, distribution of matter, and velocity flows throughout our Hubble volume. PRISM will survey the full sky in a large number of frequency bands in both intensity and polarization and will measure the absolute spectrum of sky emission more than three orders of magnitude better than COBE FIRAS. The data obtained will allow us to precisely measure the absolute sky brightness and polarization of all the components of the sky emission in the observed frequency range, separating the primordial and extragalactic components cleanly from the galactic and zodiacal light emissions. The aim of this Extended White Paper is to provide a more detailed overview of the highlights of the new science that will be made possible by PRISM, which include: (1) the ultimate galaxy cluster survey using the Sunyaev-Zeldovich (SZ) effect, detecting approximately 106clusters extending to large redshift, including a characterization of the gas temperature of the brightest ones (through the relativistic corrections to the classic SZ template) as well as a peculiar velocity survey using the kinetic SZ effect that comprises our entire Hubble volume; (2) a detailed characterization of the properties and evolution of dusty galaxies, where the most of the star formation in the universe took place, the faintest population of which constitute the diffuse CIB (Cosmic Infrared Background); (3) a characterization of the B modes from primordial gravity waves generated during inflation and from
Arnold K, Stebor N, Ade PAR, et al., 2014, The Simons Array: expanding POLARBEAR to three multi-chroic telescopes, Conference on Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
Barron D, Ade P, Anthony A, et al., 2014, The POLARBEAR Cosmic Microwave Background Polarization Experiment, JOURNAL OF LOW TEMPERATURE PHYSICS, Vol: 176, Pages: 726-732, ISSN: 0022-2291
Inoue Y, Stebor N, Ade PAR, et al., 2014, Thermal and optical characterization for POLARBEAR-2 optical cryostat, Conference on Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
MacDermid K, Aboobaker AM, Ade P, et al., 2014, The performance of the bolometer array and readout system during the 2012/2013 flight of the e and B experiment (EBEX), ISSN: 0277-786X
© 2014 SPIE. EBEX is a balloon-borne telescope designed to measure the polarization of the cosmic microwave background radiation. During its eleven day science flight in the Austral Summer of 2012, it operated 955 spider-web transition edge sensor (TES) bolometers separated into bands at 150, 250 and 410 GHz. This is the first time that an array of TES bolometers has been used on a balloon platform to conduct science observations. Polarization sensitivity was provided by a wire grid and continuously rotating half-wave plate. The balloon implementation of the bolometer array and readout electronics presented unique development requirements. Here we present an outline of the readout system, the remote tuning of the bolometers and Superconducting QUantum Interference Device (SQUID) amplifiers, and preliminary current noise of the bolometer array and readout system.
Ade PAR, Aghanim N, Alves MIR, et al., 2013, Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt system, ASTRONOMY & ASTROPHYSICS, Vol: 557, ISSN: 1432-0746
Ade PAR, Aghanim N, Argueeso F, et al., 2013, Planck intermediate results VII. Statistical properties of infrared and radio extragalactic sources from the Planck Early Release Compact Source Catalogue at frequencies between 100 and 857 GHz, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 0004-6361
Ade PAR, Aghanim N, Arnaud M, et al., 2013, Planck intermediate results XI. The gas content of dark matter halos: the Sunyaev-Zeldovich-stellar mass relation for locally brightest galaxies, ASTRONOMY & ASTROPHYSICS, Vol: 557, ISSN: 0004-6361
Ade PAR, Aghanim N, Arnaud M, et al., 2013, Planck intermediate results V. Pressure profiles of galaxy clusters from the Sunyaev-Zeldovich effect, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 0004-6361
Ade PAR, Aghanim N, Arnaud M, et al., 2013, Planck intermediate results V. Pressure profiles of galaxy clusters from the Sunyaev-Zeldovich effect (vol 550, A131, 2013), ASTRONOMY & ASTROPHYSICS, Vol: 558, ISSN: 0004-6361
Ade PAR, Aghanim N, Arnaud M, et al., 2013, Planck intermediate results VIII. Filaments between interacting clusters, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 1432-0746
Ade PAR, Aghanim N, Arnaud M, et al., 2013, Planck intermediate results VI. The dynamical structure of PLCKG214.6+37.0, a Planck discovered triple system of galaxy clusters, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 0004-6361
Ade PAR, Aghanim N, Arnaud M, et al., 2013, Planck intermediate results IV. The XMM-Newton validation programme for new Planck galaxy clusters, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 0004-6361
Heavens A, Alsing J, Jaffe AH, 2013, Combining size and shape in weak lensing, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 433, Pages: L6-L10, ISSN: 0035-8711
Jaffe A, 2013, Physics: The time lord and fellow travellers, Nature, Vol: 502, Pages: 620-622, ISSN: 0028-0836
Paykari P, Jaffe AH, 2013, Sparsely sampling the sky: a Bayesian experimental design approach, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 433, Pages: 3523-3533, ISSN: 0035-8711
Arnold K, Ade PAR, Anthony AE, et al., 2012, The bolometric focal plane array of the POLARBEAR CMB experiment, MILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY VI, Vol: 8452, ISSN: 0277-786X
Ball WT, Unruh YC, Krivova NA, et al., 2012, Reconstruction of total solar irradiance 1974-2009, ASTRONOMY & ASTROPHYSICS, Vol: 541, ISSN: 1432-0746
Bao C, Gold B, Baccigalupi C, et al., 2012, The impact of the spectral response of an achromatic half-wave plate on the measurement of the cosmic microwave background polarization, Astrophysical Journal, Vol: 747, ISSN: 0004-637X
We study the impact of the spectral dependence of the linear polarization rotation induced by an achromatic half-wave plate on measurements of cosmic microwave background polarization in the presence of astrophysical foregrounds. We focus on the systematic effects induced on the measurement of inflationary gravitational waves by uncertainties in the polarization and spectral index of Galactic dust. We find that for the experimental configuration and noise levels of the balloon-borne EBEX experiment, which has three frequency bands centered at 150, 250, and 410GHz, a crude dust subtraction process mitigates systematic effects to below detectable levels for 10% polarized dust and tensor-to-scalar ratio of as low as r = 0.01. We also study the impact of uncertainties in the spectral response of the instrument. With a top-hat model of the spectral response for each band, characterized by band center and bandwidth, and with the same crude dust subtraction process, we find that these parameters need to be determined to within 1 and 0.8GHz at 150GHz; 9 and 2.0GHz at 250GHz; and 20 and 14GHz at 410GHz, respectively. The approach presented in this paper is applicable to other optical elements that exhibit polarization rotation as a function of frequency. © 2012 The American Astronomical Society. All rights reserved.
Hasegawa M, Ade PAR, Anthony AE, et al., 2012, Cosmology and particle physics with POLARBEAR
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. Cosmic inflation predicts that primordial gravitational waves were created during the inflationary era. Measurements of polarization of the Cosmic Microwave Background (CMB) radiation are known as the best probe to detect the primordial gravitational waves. POLARBEAR is a telescope designed to detect the CMB B-mode with very sensitive polarimeters based on superconductive transition edge sensor (TES) detector technology. Its large primary mirror with a diameter of 3.5m also allows us to constrain or measure the sum of neutrino masses beyond the limit obtained so far. POLARBEAR is located on the Chajnantor plateau in the Atacama desert in northern Chile at an altitude of 5,200m. We received the first light in January 2012 and are taking CMB data at 150 GHz. In this paper we will describe the current status and prospect of POLARBEAR.
Macaulay E, Feldman HA, Ferreira PG, et al., 2012, Power spectrum estimation from peculiar velocity catalogues, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 425, Pages: 1709-1717, ISSN: 0035-8711
Sagiv I, Aboobaker AM, Bao C, et al., 2012, The EBEX cryostat and supporting electronics, 12th Marcel Grossmann Meeting on Recent Dev. in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proc. of the MG 2009 Meeting on General Relativity, Pages: 2166-2176
We describe the cryostat and supporting electronics for the EBEX experiment. EBEX is a balloon-borne polarimeter designed to measure the B-mode polarization of the cosmic microwave background radiation. The instrument includes a 1:5 meter Gregorian-type telescope and 1432 bolometric transition edge sensor detectors operating at 0.3 K. Electronics for monitoring temperatures and controlling cryostat refrigerators is read out over CANbus. A timing system ensures the data from all subsystems is accurately synchronized. EBEX completed an engineering test flight in June 2009 during which the cryogenics and supporting electronics performed according to predictions. The temperatures of the cryostat were stable, and an analysis of a subset of the data finds no scan synchronous signal in the cryostat temperatures. Preparations are underway for an Antarctic flight. Copyright © 2012 by World Scientific Publishing Co. Pte. Ltd.
Aatrokoski J, Ade PAR, Aghanim N, et al., 2011, Planck early results. XV. Spectral energy distributions and radio continuum spectra of northern extragalactic radio sources, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
Abergel A, Ade PAR, Aghanim N, et al., 2011, Planck early results. XXIV. Dust in the diffuse interstellar medium and the Galactic halo, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
Abergel A, Ade PAR, Aghanim N, et al., 2011, Planck early results. XXV. Thermal dust in nearby molecular clouds, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 1432-0746
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