Start year
1986
Organizational Unit
Organizing institutions
Grants related:
General
Description
The general goal of this project is to determine and characterize the spatial and spectral variations in the temperature and polarisation of the Cosmic Microwave Background in angular scales from several arcminutes to several degrees. The primordial matter density fluctuations which originated the structure in the matter distribution of the present Universe, left imprinted inhomogeneities in the CMB temperature distribution, that are mathematically encoded in the so-called angular power spectrum. Initially, pioneering experiments like the COBE satellite (whose results deserved the Nobel Prize on Physics 2006) or the Tenerife CMB experiment demonstrated in the 90s that the level of anisotropy was about one part in a hundred thousands at angular scales of several degrees. Obtaining CMB maps at various frequencies with sufficient sensitivity to detect structures at this level is of fundamental importance to extract information on the power spectrum of primordial density fluctuations, to prove the existence of an inflationary period in the Early Universe and to establish the ultimate nature of the dark matter and dark energy. Recently, the WMAP satellite obtained CMB maps with unprecedented sensitivity that allowed to set restrictions on a large number of cosmological parameters.
The focus of this project is to undertake measurements at gradually higher angular resolutions and sensitivities, by using different experiments that have been operative from the Teide Observatory, like the Tenerife experiment, the IAC-Bartol experiment or the JBO-IAC interferometer. More recently, the Very Small Array interferometer performed observations between 1999 and 2008. At that time the COSMOSOMAS experiment was also operative, its goal having been not only the characterization of the primary CMB anisotropies but also the study and characterization of the Galactic foreground contamination. In more recent years the activity in this project has focused in the scientific exploitation of data from the Planck satellite, and in the development, operation and exploitation of the QUIJOTE experiment. Now that the Planck mission has been completed and finished, the activity is focused in the scientific exploitation of QUIJOTE, in the development of new instrumentation for QUIJOTE, and in in the development of new experiments that are being deployed or that will be deployed at the Teide Observatory: GroundBRID, STRIP, KISS and TMS.
Members
Principal investigator
Prof.
Rafael
Rebolo López
Project staff
Ricardo Tanausú
Genova Santos
Carlos Manuel
Gutiérrez de La Cruz
José Alberto
Rubiño Martín
Frédéric Nicolas David
Poidevin
Collaborators
Prof.
Anthony Lasenby
Dr.
Fernando Atrio Barandela
Dr.
Enrique Martínez González
Dr.
Carlos Hernández Monteagudo
Results
- 6-7 june: XV QUIJOTE Scientific Meeting (IFCA, Santander)
- July: publication of the final results (12 articles) and data from the Planck satellite.
- 15-19 october: "CMB foregrounds for B-mode studies" conference, organised within the Radioforegrounds proyect, IV AME workshop, and XVI QUIJOTE Scientific Meeting (all these eventes were celebrated at the IAC)
- October: installation of the dome of the GroundBIRD experiment, at the Teide Observatory.
- December: aceptation of the third QUIJOTE scientific article (Poidevin et al. 2019)
Scientific activity
Related publications
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Cosmic Amorphous Dust Model as the Origin of Anomalous Microwave EmissionWe have shown that the thermal emission of the amorphous dust composed of amorphous silicate dust (a-Si) and amorphous carbon dust (a-C) provides an excellent fit both to the observed intensity and the polarization spectra of molecular clouds. The anomalous microwave emission (AME) originates from the resonance transition of the two-level systemsNashimoto, Masashi et al.
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92020 -
GroundBIRD: A CMB Polarization Experiment with MKID ArraysGroundBIRD is a ground-based experiment for a precise observation of the cosmic microwave background (CMB) polarizations. To achieve high sensitivity at large angular scales, we adopt three features in this experiment: fast rotation scanning, microwave kinetic inductance detector (MKID), and cold optics. The rotation scanning strategy has theLee, K. et al.
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82020 -
Planck 2018 results. VIII. Gravitational lensingWe present measurements of the cosmic microwave background (CMB) lensing potential using the final Planck 2018 temperature and polarization data. Using polarization maps filtered to account for the noise anisotropy, we increase the significance of the detection of lensing in the polarization maps from 5σ to 9σ. Combined with temperature, lensing isPlanck Collaboration et al.
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92020 -
Planck 2018 results. IV. Diffuse component separationWe present full-sky maps of the cosmic microwave background (CMB) and polarized synchrotron and thermal dust emission, derived from the third set of Planck frequency maps. These products have significantly lower contamination from instrumental systematic effects than previous versions. The methodologies used to derive these maps follow closelyPlanck Collaboration et al.
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92020 -
Planck 2018 results. II. Low Frequency Instrument data processingWe present a final description of the data-processing pipeline for the Planck Low Frequency Instrument (LFI), implemented for the 2018 data release. Several improvements have been made with respect to the previous release, especially in the calibration process and in the correction of instrumental features such as the effects of nonlinearity in thePlanck Collaboration et al.
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92020 -
Planck 2018 results. VII. Isotropy and statistics of the CMBAnalysis of the Planck 2018 data set indicates that the statistical properties of the cosmic microwave background (CMB) temperature anisotropies are in excellent agreement with previous studies using the 2013 and 2015 data releases. In particular, they are consistent with the Gaussian predictions of the ΛCDM cosmological model, yet also confirm thePlanck Collaboration et al.
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92020 -
Planck 2018 results. V. CMB power spectra and likelihoodsWe describe the legacy Planck cosmic microwave background (CMB) likelihoods derived from the 2018 data release. The overall approach is similar in spirit to the one retained for the 2013 and 2015 data release, with a hybrid method using different approximations at low (ℓ < 30) and high (ℓ ≥ 30) multipoles, implementing several methodological andPlanck Collaboration et al.
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92020 -
Planck 2018 results. XI. Polarized dust foregroundsThe study of polarized dust emission has become entwined with the analysis of the cosmic microwave background (CMB) polarization in the quest for the curl-like B-mode polarization from primordial gravitational waves and the low-multipole E-mode polarization associated with the reionization of the Universe. We used the new Planck PR3 maps toPlanck Collaboration et al.
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92020 -
Planck 2018 results. IX. Constraints on primordial non-GaussianityWe analyse the Planck full-mission cosmic microwave background (CMB) temperature and E-mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). We compare estimates obtained from separable template-fitting, binned, and optimal modal bispectrum estimators, finding consistent values for the local, equilateral, and orthogonalPlanck Collaboration et al.
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92020 -
Planck 2018 results. XII. Galactic astrophysics using polarized dust emissionObservations of the submillimetre emission from Galactic dust, in both total intensity I and polarization, have received tremendous interest thanks to the Planck full-sky maps. In this paper we make use of such full-sky maps of dust polarized emission produced from the third public release of Planck data. As the basis for expanding on astrophysicalPlanck Collaboration et al.
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92020 -
Planck 2018 results. I. Overview and the cosmological legacy of PlanckThe European Space Agency's Planck satellite, which was dedicated to studying the early Universe and its subsequent evolution, was launched on 14 May 2009. It scanned the microwave and submillimetre sky continuously between 12 August 2009 and 23 October 2013, producing deep, high-resolution, all-sky maps in nine frequency bands from 30 to 857 GHzPlanck Collaboration et al.
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92020 -
Planck 2018 results. X. Constraints on inflationWe report on the implications for cosmic inflation of the 2018 release of the Planck cosmic microwave background (CMB) anisotropy measurements. The results are fully consistent with those reported using the data from the two previous Planck cosmological releases, but have smaller uncertainties thanks to improvements in the characterization ofPlanck Collaboration et al.
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92020 -
Planck 2018 results. VI. Cosmological parametersWe present cosmological parameter results from the final full-mission Planck measurements of the cosmic microwave background (CMB) anisotropies, combining information from the temperature and polarization maps and the lensing reconstruction. Compared to the 2015 results, improved measurements of large-scale polarization allow the reionizationPlanck Collaboration et al.
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92020 -
The C-Band All-Sky Survey: total intensity point-source detection over the northern skyWe present a point-source detection algorithm that employs the second-order Spherical Mexican Hat wavelet filter (SMHW2), and use it on C-Band All-Sky Survey (C-BASS) northern intensity data to produce a catalogue of point sources. This catalogue allows us to cross-check the C-BASS flux-density scale against existing source surveys, and providesGrumitt, R. D. P. et al.
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62020 -
Resolved observations at 31 GHz of spinning dust emissivity variations in ρ OphThe ρ Oph molecular cloud is one of the best examples of spinning dust emission, first detected by the cosmic background imager (CBI). Here, we present 4.5 arcmin observations with CBI 2 that confirm 31 GHz emission from ρ Oph W, the PDR exposed to B-type star HD 147889, and highlight the absence of signal from S1, the brightest IR nebula in theArce-Tord, Carla et al.
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52020 -
Nightside condensation of iron in an ultrahot giant exoplanetUltrahot giant exoplanets receive thousands of times Earth's insolation 1,2. Their high-temperature atmospheres (greater than 2,000 kelvin) are ideal laboratories for studying extreme planetary climates and chemistry 3-5. Daysides are predicted to be cloud-free, dominated by atomic species 6 and much hotter than nightsides 5,7,8. Atoms are expectedEhrenreich, David et al.
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32020 -
Thermal emission from the amorphous dust: An alternative possibility of the origin of the anomalous microwave emissionComplete studies of the radiative processes of thermal emission from the amorphous dust from microwave through far-infrared wavebands are presented by taking into account, self-consistently for the first time, the standard two-level systems (TLS) model of amorphous materials. The observed spectral energy distributions (SEDs) for the PerseusNashimoto, Masashi et al.
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22020 -
Manufacturing of 3D-metallic electromagnetic metamaterials for feedhorns usedin radioastronomy and satellite communicationsThe electromagnetic metamaterials at microwaves frequencies are well established in industrial applications nowadays. Recent research has shown that a specific kind of metallic metamaterial can contribute to improve the performance of the microwave feedhorns used in radioastronomy and satellite telecommunications. In this article, we theoreticallyde Miguel-Hernández, J. et al.
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102019 -
A High Sensitivity Fourier Transform Spectrometer for Cosmic Microwave Back-ground ObservationsThe QUIJOTE Experiment was developed to study the polarization in the Cosmic Microwave Background (CMB) over the frequency range of 10-50 GHz. Its first instrument, the Multi-Frequency-Instrument (MFI), measures in the range 10-20 GHz which coincides with one of the naturally transparent windows in the atmosphere. The Tenerife Microwavede Miguel-Hernández, J. et al.
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102019 -
Fundamentals of horn antennas with low cross-polarization levels for radioastronomy and satellite communicationsThe literature on horn antennas dedicated to radio astronomy and satellite communications applications is very extensive and at times disjointed, relevant contributions being distributed as far back as from the 60's until the present today. This work combines a compact but complete review of the different theories, methodologies and techniques usedDe Miguel-Hernández, J. et al.
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82019
Related talks
No related talks were found.Related conferences
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XIX Canary Islands Winter School of Astrophysics "The Cosmic Microwave | Background: from quantum fluctuations to the present Universe"Tenerife, Canary IslandsSpainDate-Past
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