Subvenciones relacionadas:
General
El objetivo general de este proyecto es determinar y estudiar las variaciones espaciales y espectrales en la temperatura del Fondo Cósmico de Microondas y en su Polarización en un amplio rango de escalas angulares que van desde pocos minutos de arco hasta varios grados. Las fluctuaciones primordiales en la densidad de materia, que dieron origen a las estructuras en la distribución de materia del Universo actual, debieron dejar una huella impresa en el Fondo de Microondas en forma de irregularidades en la distribución espacial de su temperatura. Experimentos pioneros como COBE (galardonados dos de sus investigadores principales con el Premio Nobel de Física en 2006) o Tenerife demostraron que el nivel de anisotropía en escalas angulares de varios grados está en torno a una parte en cien mil. La obtención de mapas del Fondo de Microondas en varias frecuencias y con sensibilidad suficiente para detectar estructuras a estos niveles es fundamental para obtener información sobre el espectro de potencias de las fluctuaciones primordiales en densidad, la existencia de un periodo inflacionario en el Universo muy temprano y la naturaleza de la materia y energía oscura. Más recientemente el satélite WMAP ha obtenido mapas del Fondo Cósmico de Microondas que han permitido establecer cotas sobre múltiples parámetros cosmológicos con precisiones mejores que el 10%.
El Proyecto concentra sus esfuerzos en realizar medidas a más alta resolución espacial y sensibilidad que las obtenidas por este satélite. En el pasado se utilizaron con este fin experimentos como Tenerife, el IAC-Bartol o el interferómetro JBO-IAC, todos ellos desde el Observatorio del Teide. Más recientemente, el experimento interferométrico Very Small Array a 33 GHz fue operativo entre 1999 y 2008. Durante este tiempo también realizó observaciones desde el observatorio del Teide el experimento COSMOSOMAS, cuyo objetivo era, además de la medida de las anisotropías del CMB, la caracterización de los contaminantes galácticos.
En los últimos 10 la actividad de este proyecto se ha centrado en la explotación científica de los datos del satélite Planck, y en la construcción, la operación y la explotación científica de los datos del experimento QUIJOTE. En la actualidad, una vez el proyecto Planck ha finalizado, la actividad se centra en la explotación científica de QUIJOTE, en el desarrollo y construcción de nueva instrumentación para el proyecto QUIJOTE, y en el desarrollo de nuevos experimentos que están siendo o que serán próximamente instalados en el Observatorio del Teide: GroundBIRD, LSPE-STRIP y TMS.
Miembros
Resultados
- 6-7 de junio: XV reunión científica del Consorcio QUIJOTE (IFCA, Santander)
- Julio: publicación de los resultados (12 artículos) y de los datos finales del satélite Planck.
- 15-19 de octubre: Congreso "CMB foregrounds for B-mode studies", dentro del proyecto Radioforegrounds, IV AME workshop, y XVI reunión científica del Consorcio QUIJOTE (todos estos eventos celebrados en el IAC).
- Octubre: instalación el observatorio del Teide de la cúpula de GroundBIRD.
- Diciembre: aceptación del tercer artículo científico de QUIJOTE (Poidevin et al. 2019)
Actividad científica
Publicaciones relacionadas
-
JCMT BISTRO Observations: Magnetic Field Morphology of Bubbles Associated with NGC 6334We study the HII regions associated with the NGC 6334 molecular cloud observed in the submillimeter and taken as part of the B-fields In STar-forming Region Observations Survey. In particular, we investigate the polarization patterns and magnetic field morphologies associated with these HII regions. Through polarization pattern and pressureLi, Di et al.
Fecha de publicación:
22023 -
QUIJOTE scientific results - VII. Galactic AME sources in the QUIJOTE-MFI northern hemisphere wide surveyThe QUIJOTE-MFI Northern Hemisphere Wide Survey has provided maps of the sky above declinations -30° at 11, 13, 17, and 19 GHz. These data are combined with ancillary data to produce Spectral Energy Distributions in intensity in the frequency range 0.4-3 000 GHz on a sample of 52 candidate compact sources harbouring anomalous microwave emissionPoidevin, F. et al.
Fecha de publicación:
32023 -
QUIJOTE scientific results - IX. Radio sources in the QUIJOTE-MFI wide survey mapsWe present the catalogue of Q-U-I JOint TEnerife (QUIJOTE) Wide Survey radio sources extracted from the maps of the Multi-Frequency Instrument compiled between 2012 and 2018. The catalogue contains 786 sources observed in intensity and polarization, and is divided into two separate sub-catalogues: one containing 47 bright sources previously studiedHerranz, D. et al.
Fecha de publicación:
32023 -
QUIJOTE scientific results - VIII. Diffuse polarized foregrounds from component separation with QUIJOTE-MFIWe derive linearly polarized astrophysical component maps in the Northern Sky from the QUIJOTE-MFI data at 11 and 13 GHz in combination with the Wilkinson Microwave Anisotropy Probe K and Ka bands (23 and 33 GHz) and all Planck polarized channels (30-353 GHz), using the parametric component separation method B-SeCRET. The addition of QUIJOTE-MFIde la Hoz, E. et al.
Fecha de publicación:
32023 -
QUIJOTE scientific results - V. The microwave intensity and polarization spectra of the Galactic regions W49, W51 and IC443We present new intensity and polarization maps obtained with the QUIJOTE experiment towards the Galactic regions W49, W51 and IC443, covering the frequency range from 10 to 20 GHz at $\sim 1\, \text{deg}$ angular resolution, with a sensitivity in the range 35-79 $\mu \text{K}\, \text{beam}^{-1}$ for total intensity and 13-23 $\mu \text{K}\, \textTramonte, D. et al.
Fecha de publicación:
32023 -
QUIJOTE scientific results - VI. The Haze as seen by QUIJOTEThe Haze is an excess of microwave intensity emission surrounding the Galactic Centre. It is spatially correlated with the γ-ray Fermi bubbles, and with the S-PASS radio polarization plumes, suggesting a possible common provenance. The models proposed to explain the origin of the Haze, including energetic events at the Galactic Centre and darkGuidi, F. et al.
Fecha de publicación:
32023 -
QUIJOTE scientific results - IV. A northern sky survey in intensity and polarization at 10-20 GHz with the multifrequency instrumentWe present QUIJOTE intensity and polarization maps in four frequency bands centred around 11, 13, 17, and 19 GHz, and covering approximately 29 000 deg 2, including most of the northern sky region. These maps result from 9000 h of observations taken between May 2013 and June 2018 with the first QUIJOTE multifrequency instrument (MFI), and haveRubiño-Martín, J. A. et al.
Fecha de publicación:
32023 -
Constraining the baryonic feedback with cosmic shear using the DES Year-3 small-scale measurementsWe use the small scales of the Dark Energy Survey (DES) Year-3 cosmic shear measurements, which are excluded from the DES Year-3 cosmological analysis, to constrain the baryonic feedback. To model the baryonic feedback, we adopt a baryonic correction model and use the numerical package BACCOEMU to accelerate the evaluation of the baryonic nonChen, A. et al.
Fecha de publicación:
22023 -
Constraints on primordial magnetic fields from their impact on the ionization history with Planck 2018We update and extend our previous cosmic microwave background anisotropy constraints on primordial magnetic fields through their dissipation by ambipolar diffusion and magnetohydrodynamic decaying turbulence effects on the post-recombination ionization history. We derive the constraints using the latest Planck 2018 data release which improves onPaoletti, D. et al.
Fecha de publicación:
122022 -
The BINGO Project. III. Optical design and optimization of the focal planeContext. The Baryon Acoustic Oscillations from Integrated Neutral Gas Observations (BINGO) telescope was designed to measure the fluctuations of the 21 cm radiation arising from the hyperfine transition of neutral hydrogen. It is also aimed at measuring the baryon acoustic oscillations (BAO) from such fluctuations, thereby serving as a pathfinderAbdalla, Filipe B. et al.
Fecha de publicación:
82022 -
The BINGO project. IV. Simulations for mission performance assessment and preliminary component separation stepsAims: The large-scale distribution of neutral hydrogen (H I) in the Universe is luminous through its 21 cm emission. The goal of the Baryon Acoustic Oscillations from Integrated Neutral Gas Observations (BINGO) radio telescope is to detect baryon acoustic oscillations at radio frequencies through 21 cm intensity mapping (IM). The telescope willLiccardo, Vincenzo et al.
Fecha de publicación:
82022 -
The BINGO project. II. Instrument descriptionContext. The measurement of diffuse 21-cm radiation from the hyperfine transition of neutral hydrogen (H I signal) in different redshifts is an important tool for modern cosmology. However, detecting this faint signal with non-cryogenic receivers in single-dish telescopes is a challenging task. The BINGO (Baryon Acoustic Oscillations fromWuensche, Carlos A. et al.
Fecha de publicación:
82022 -
The BINGO project. V. Further steps in component separation and bispectrum analysisContext. Observing the neutral hydrogen distribution across the Universe via redshifted 21 cm line intensity mapping constitutes a powerful probe for cosmology. However, the redshifted 21 cm signal is obscured by the foreground emission from our Galaxy and other extragalactic foregrounds. This paper addresses the capabilities of the BINGO survey toFornazier, Karin S. F. et al.
Fecha de publicación:
82022 -
The BINGO project. I. Baryon acoustic oscillations from integrated neutral gas observationsContext. Observations of the redshifted 21-cm line of neutral hydrogen (H I) are a new and powerful window of observation that offers us the possibility to map the spatial distribution of cosmic H I and learn about cosmology. Baryon Acoustic Oscillations from Integrated Neutral Gas Observations (BINGO) is a new unique radio telescope designed to beAbdalla, Elcio et al.
Fecha de publicación:
82022 -
Fundamental physics with ESPRESSO: Constraints on Bekenstein and dark energy models from astrophysical and local probes<SUP>*</SUP>Dynamical scalar fields in an effective four-dimensional field theory are naturally expected to couple to the rest of the theory's degrees of freedom, unless some new symmetry is postulated to suppress these couplings. In particular, a coupling to the electromagnetic sector will lead to spacetime variations of the fine-structure constant, αMartins, C. J. A. P. et al.
Fecha de publicación:
62022 -
Searching for dark-matter waves with PPTA and QUIJOTE pulsar polarimetryThe polarization of photons emitted by astrophysical sources might be altered as they travel through a dark matter medium composed of ultra light axion-like particles (ALPs). In particular, the coherent oscillations of the ALP background in the galactic halo induce a periodic change on the polarization of the electromagnetic radiation emitted byCastillo, Andrés et al.
Fecha de publicación:
62022 -
The C-Band All-Sky Survey (C-BASS): template fitting of diffuse galactic microwave emission in the northern skyThe C-Band All-Sky Survey (C-BASS) has observed the Galaxy at 4.76 GHz with an angular resolution of 0${_{.}^{\circ}}$73 full-width half-maximum, and detected Galactic synchrotron emission with high signal-to-noise ratio over the entire northern sky (δ > -15 ○). We present the results of a spatial correlation analysis of Galactic foregrounds at midHarper, S. E. et al.
Fecha de publicación:
72022 -
Polarization angle requirements for CMB B-mode experiments. Application to the LiteBIRD satelliteA methodology to provide the polarization angle requirements for different sets of detectors, at a given frequency of a CMB polarization experiment, is presented. The uncertainties in the polarization angle of each detector set are related to a given bias on the tensor-to-scalar ratio r parameter. The approach is grounded in using a linearVielva, P. et al.
Fecha de publicación:
42022 -
Velocity dispersion and dynamical masses for 388 galaxy clusters and groups. Calibrating the M<SUB>SZ</SUB> − M<SUB>dyn</SUB> scaling relation for the PSZ2 sampleThe second catalogue of Planck Sunyaev-Zeldovich (SZ) sources, hereafter PSZ2, represents the largest galaxy cluster sample selected by means of their SZ signature in a full-sky survey. Using telescopes at the Canary Island observatories, we conducted the long-term observational program 128- MULTIPLE-16/15B (hereafter LP15), a large and completeAguado-Barahona, A. et al.
Fecha de publicación:
32022 -
Fundamental physics with ESPRESSO: Precise limit on variations in the fine-structure constant towards the bright quasar HE 0515−4414The strong intervening absorption system at redshift 1.15 towards the very bright quasar HE 0515−4414 is the most studied absorber for measuring possible cosmological variations in the fine-structure constant, α. We observed HE 0515−4414 for 16.1 h with the Very Large Telescope and present here the first constraint on relative variations in α withMurphy, Michael T. et al.
Fecha de publicación:
22022
Charlas relacionadas
No se han encontrado charlas relacionadas.Congresos relacionados
-
XIX Canary Islands Winter School of Astrophysics "The Cosmic Microwave | Background: from quantum fluctuations to the present Universe"Tenerife, Canary IslandsEspañaFecha-Anteriores