Publications
368 results found
Ade PAR, Aghanim N, Alves MIR, et al., 2013, <i>Planck</i> intermediate results. XII: Diffuse Galactic components in the Gould Belt system, ASTRONOMY & ASTROPHYSICS, Vol: 557, ISSN: 0004-6361
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- Citations: 9
Ade PAR, Aghanim N, Arnaud M, et al., 2013, <i>Planck</i> 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
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- Citations: 127
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
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- Citations: 9
Heavens A, Alsing J, Jaffe AH, 2013, Combining size and shape in weak lensing, Monthly Notices of the Royal Astronomical Society: Letters, Vol: 433, Pages: L6-L10, ISSN: 1745-3933
Weak lensing alters the size of images with a similar magnitude to the distortion due to shear. Galaxy size probes the convergence field and shapes the shear field, both of which contain cosmological information. We show the gains expected in the dark energy figure of merit if galaxy size information is used in combination with galaxy shape. In any normal analysis of cosmic shear, galaxy sizes are also studied, so this is extra statistical information that comes for free and is currently unused. There are two main results in this Letter: first, we show that size measurement can be made uncorrelated with ellipticity measurement, thus allowing the full statistical gain from the combination, provided that √area is used as a size indicator; secondly, as a proof of concept, we show that when the relevant modes are noise dominated, as is the norm for lensing surveys, the gains are substantial, with improvements of about 68 per cent in the figure of merit expected when systematic errors are ignored. An approximate treatment of such systematics such as intrinsic alignments and size–magnitude correlations, respectively, suggests that a much better improvement in the dark energy figure of merit of even a factor of ∼4 may be achieved.
Ade PAR, Aghanim N, Arnaud M, et al., 2013, <i>Planck</i> intermediate results IV. The <i>XMM</i>-<i>Newton</i> validation programme for new <i>Planck</i> galaxy clusters, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 0004-6361
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- Citations: 31
Ade PAR, Aghanim N, Arnaud M, et al., 2013, <i>Planck</i> intermediate results VI. The dynamical structure of PLCKG214.6+37.0, a <i>Planck</i> discovered triple system of galaxy clusters, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 0004-6361
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- Citations: 8
Ade PAR, Aghanim N, Argueeso F, et al., 2013, <i>Planck</i> intermediate results VII. Statistical properties of infrared and radio extragalactic sources from the <i>Planck</i> Early Release Compact Source Catalogue at frequencies between 100 and 857 GHz, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 0004-6361
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- Citations: 42
Ade PAR, Aghanim N, Arnaud M, et al., 2013, <i>Planck</i> intermediate results VIII. Filaments between interacting clusters, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 0004-6361
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- Citations: 78
Ade PAR, Aghanim N, Arnaud M, et al., 2013, <i>Planck</i> intermediate results V. Pressure profiles of galaxy clusters from the Sunyaev-Zeldovich effect, ASTRONOMY & ASTROPHYSICS, Vol: 550, ISSN: 0004-6361
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- Citations: 229
Suzuki A, Arnold K, Edwards J, et al., 2012, Multichroic dual-polarization bolometric detectors for studies of the cosmic microwave background, SPIE Proceedings, ISSN: 0277-786X
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
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- Citations: 31
Ball WT, Unruh YC, Krivova NA, et al., 2012, Reconstruction of total solar irradiance 1974-2009, ASTRONOMY & ASTROPHYSICS, Vol: 541, ISSN: 1432-0746
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- Citations: 84
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
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- Citations: 18
Nishino H, Ade P, Anthony A, et al., 2012, The polarbear experiment, Pages: 63-66
Polarbear is a ground-based experiment in the Atacama desert in Chile, designed to measure the polarization of the Cosmic Microwave Background (CMB) radiation. The main science goals of POLARBEAR are to discover B-mode polarization of the CMB due to gravitational waves produced during the epoch of cosmological inflation. Detection of the B-mode polarization pattern in the CMB would provide strong evidence for inflationary cosmological models while the non-detection of B-modes by POLARBEAR would rule out a majority of single-field, slow-roll inflationary models. POLARBEAR will observe 700 square-degrees of the sky at 150 GHz with an array of 1,274 polarized antenna-coupled Transition Edge Sensor (TES) bolometers. POLARBEAR is expected to reach a sensitivity to the tensor-to-scalar ratio r = 0.025 at 95% confidence level, using the data from 2-years of operation. The beam size of 3.5 arcminutes makes it possible to also detect B-mode polarization signals at small-angular scales. These signals originate from weak gravitational lensing and are therefore sensitive to dark energy and the summed masses of neutrinos. POLARBEAR will be able to measure the sum of neutrino masses with a sensitivity of 75 meV, at 68%C.L., when our data are combined with the forthcoming data from Planck HFI. POLARBEAR was deployed in September 2011 and achieved "first-light" four months later, in January 2012. We will report the current status and the future prospects of POLARBEAR.
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.
Hasegawa M, Ade PAR, Anthony AE, et al., 2012, Cosmology and particle physics with POLARBEAR
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.
Kermish ZD, Ade P, Anthony A, et al., 2012, The POLARBEAR Experiment, MILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY VI, Vol: 8452, ISSN: 0277-786X
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- Citations: 52
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
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- Citations: 22
Ade PAR, Aghanim N, Ansari R, et al., 2011, Planck early results. IV. First assessment of the High Frequency Instrument in-flight performance, Astronomy and Astrophysics, Vol: 536, ISSN: 0004-6361
The Planck High Frequency Instrument (HFI) is designed to measure the temperature and polarization anisotropies of the cosmic microwave background and Galactic foregrounds in six ~30% bands centered at 100, 143, 217, 353, 545, and 857 GHz at an angular resolution of 10′ (100 GHz), 7′ (143 GHz), and 5′ (217 GHz and higher). HFI has been operating flawlessly since launch on 14 May 2009, with the bolometers reaching 100 mK the first week of July. The settings of the readout electronics, including bolometer bias currents, that optimize HFI’s noise performance on orbit are nearly the same as the ones chosen during ground testing. Observations of Mars, Jupiter, and Saturn have confirmed that the optical beams and the time responses of the detection chains are in good agreement with the predictions of physical optics modeling and pre-launch measurements. The Detectors suffer from a high flux of cosmic rays due to historically low levels of solar activity. As a result of the redundancy of Planck’s observation strategy, theremoval of a few percent of data contaminated by glitches does not significantly affect the instrumental sensitivity. The cosmic ray flux represents a significant and variable heat load on the sub-Kelvin stage. Temporal variation and the inhomogeneous distribution of the flux results in thermal fluctuations that are a probable source of low frequency noise. The removal of systematic effects in the time ordered data provides a signal with an average noise equivalent power that is 70% of the goal in the 0.6−2.5 Hz range. This is slightly higher than was achieved during the pre-launch characterization but better than predicted in the early phases of the project. The improvement over the goal is a result of the low level of instrumental background loading achieved by the optical and thermal design of the HFI.
Ade PAR, Aghanim N, Ansari R, et al., 2011, Planck early results. VI. The High Frequency Instrument data processing, Astronomy and Astrophysics: a European journal, Vol: 536, ISSN: 0004-6361
We describe the processing of the 336 billion raw data samples from the High Frequency Instrument (HFI) which we performed to produce sixtemperature maps from the first 295 days of Planck-HFI survey data. These maps provide an accurate rendition of the sky emission at 100, 143,217, 353, 545 and 857 GHz with an angular resolution ranging from 9.9 to 4.4. The white noise level is around 1.5 μK degree or less in the 3 mainCMB channels (100–217 GHz). The photometric accuracy is better than 2% at frequencies between 100 and 353 GHz and around 7% at the twohighest frequencies. The maps created by the HFI Data Processing Centre reach our goals in terms of sensitivity, resolution, and photometricaccuracy. They are already sufficiently accurate and well-characterised to allow scientific analyses which are presented in an accompanying seriesof early papers. At this stage, HFI data appears to be of high quality and we expect that with further refinements of the data processing we shouldbe able to achieve, or exceed, the science goals of the Planck project.
Aghanim N, Arnaud M, Ashdown M, et al., 2011, <i>Planck</i> early results. XII. Cluster Sunyaev-Zeldovich optical scaling relations, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 98
Ade PAR, Aghanim N, Arnaud M, et al., 2011, <i>Planck</i> early results. XI. Calibration of the local galaxy cluster Sunyaev-Zeldovich scaling relations, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 166
Ade PAR, Aghanim N, Arnaud M, et al., 2011, <i>Planck</i> early results. XX. New light on anomalous microwave emission from spinning dust grains, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 147
Aghanim N, Arnaud M, Ashdown M, et al., 2011, <i>Planck</i> early results. X. Statistical analysis of Sunyaev-Zeldovich scaling relations for X-ray galaxy clusters, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 126
Ade PAR, Aghanim N, Arnaud M, et al., 2011, <i>Planck</i> early results. XXII. The submillimetre properties of a sample of Galactic cold clumps, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 83
Ade PAR, Aghanim N, Arnaud M, et al., 2011, <i>Planck</i> early results. I. The <i>Planck</i> mission, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 420
Aghanim N, Arnaud M, Ashdown M, et al., 2011, <i>Planck</i> early results. IX. <i>XMM</i>-<i>Newton</i> follow-up for validation of <i>Planck</i> cluster candidates, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 114
Ade PAR, Aghanim N, Arnaud M, et al., 2011, <i>Planck</i> early results. XVI. The <i>Planck</i> view of nearby galaxies, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 75
Ade PAR, Aghanim N, Argueeso F, et al., 2011, <i>Planck</i> early results. XIII. Statistical properties of extragalactic radio sources in the <i>Planck</i> Early Release Compact Source Catalogue, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 99
Ade PAR, Aghanim N, Arnaud M, et al., 2011, <i>Planck</i> early results. II. The thermal performance of <i>Planck</i>, ASTRONOMY & ASTROPHYSICS, Vol: 536, ISSN: 0004-6361
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- Citations: 92
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