Anisotropy of the Cosmic Microwave Background

    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.

    Principal investigator
    Project staff
    Collaborators
    Dr.
    Fernando Atrio Barandela
    Dr.
    Enrique Martínez González
    Dr.
    Carlos Hernández Monteagudo
    1. 6-7 june: XV QUIJOTE Scientific Meeting (IFCA, Santander)
    2. July: publication of the final results (12 articles) and data from the Planck satellite.
    3. 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)
    4. October: installation of the dome of the GroundBIRD experiment, at the Teide Observatory.
    5. December: aceptation of the third QUIJOTE scientific article (Poidevin et al. 2019)

    Related publications

    • Accurate sky signal reconstruction for ground-based spectroscopy with kinetic inductance detectors

      Context. Wide-field spectrometers are needed to deal with current astrophysical challenges that require multiband observations at millimeter wavelengths. An example of these is the KIDs Interferometer Spectrum Survey (KISS), which uses two arrays of kinetic inductance detectors (KIDs) coupled to a Martin-Puplett interferometer (MPI). KISS has a

      Fasano, A. et al.

      Advertised on:

      12
      2021
    • Revisiting the Distance to Radio Loops I and IV Using Gaia and Radio/Optical Polarization Data

      Galactic synchrotron emission exhibits large angular scale features known as radio spurs and loops. Determining the physical size of these structures is important for understanding the local interstellar structure and for modeling the Galactic magnetic field. However, the distance to these structures is either under debate or entirely unknown. We

      Panopoulou, G. V. et al.

      Advertised on:

      12
      2021
    • Microwave spectro-polarimetry of matter and radiation across space and time

      This paper discusses the science case for a sensitive spectro-polarimetric survey of the microwave sky. Such a survey would provide a tomographic and dynamic census of the three-dimensional distribution of hot gas, velocity flows, early metals, dust, and mass distribution in the entire Hubble volume, exploit CMB temperature and polarisation

      Delabrouille, Jacques et al.

      Advertised on:

      6
      2021
    • A space mission to map the entire observable universe using the CMB as a backlight

      This Science White Paper, prepared in response to the ESA Voyage 2050 call for long-term mission planning, aims to describe the various science possibilities that can be realized with an L-class space observatory that is dedicated to the study of the interactions of cosmic microwave background (CMB) photons with the cosmic web. Our aim is

      Bartlett, James G. et al.

      Advertised on:

      6
      2021
    • New horizons in cosmology with spectral distortions of the cosmic microwave background

      This Voyage 2050 paper highlights the unique science opportunities using spectral distortions of the cosmic microwave background (CMB). CMB spectral distortions probe many processes throughout the history of the Universe, delivering novel information that complements past, present and future efforts with CMB anisotropy and large-scale structure

      Silk, J. et al.

      Advertised on:

      6
      2021
    • The PICASSO map-making code: application to a simulation of the QUIJOTE northern sky survey

      Map-making is an important step for the data analysis of cosmic microwave background (CMB) experiments. It consists of converting the data, which are typically a long, complex, and noisy collection of measurements, into a map, which is an image of the observed sky. We present in this paper a new map-making code named PICASSO (Polarization and

      Guidi, F. et al.

      Advertised on:

      11
      2021
    • Study of the thermal and nonthermal emission components in M 31: the Sardinia Radio Telescope view at 6.6 GHz

      Context. The Andromeda galaxy is the best-known large galaxy besides our own Milky Way. Several images and studies exist at all wavelengths from radio to hard X-ray. Nevertheless, only a few observations are available in the microwave range where its average radio emission reaches the minimum. Aims: In this paper, we want to study the radio

      Fatigoni, S. et al.

      Advertised on:

      7
      2021
    • The large scale polarization explorer (LSPE) for CMB measurements: performance forecast

      The measurement of the polarization of the Cosmic Microwave Background (CMB) radiation is one of the current frontiers in cosmology. In particular, the detection of the primordial divergence-free component of the polarization field, the B-mode, could reveal the presence of gravitational waves in the early Universe. The detection of such a component

      Addamo, G. et al.

      Advertised on:

      8
      2021
    • A Forecast of the Sensitivity on the Measurement of the Optical Depth to Reionization with the GroundBIRD Experiment

      We compute the expected sensitivity on measurements of optical depth to reionization for a ground-based experiment at Teide Observatory. We simulate polarized partial sky maps for the GroundBIRD experiment at the frequencies 145 and 220 GHz. We perform fits for the simulated maps with our pixel-based likelihood to extract the optical depth to

      Lee, K. et al.

      Advertised on:

      7
      2021
    • Cosmological parameter forecasts by a joint 2D tomographic approach to CMB and galaxy clustering

      The cross-correlation between the cosmic microwave background (CMB) fields and matter tracers carries important cosmological information. In this paper, we forecast by a signal-to-noise ratio analysis the information contained in the cross-correlation of the CMB anisotropy fields with source counts for future cosmological observations and its

      Bermejo-Climent, José Ramón et al.

      Advertised on:

      5
      2021
    • Detection of spectral variations of Anomalous Microwave Emission with QUIJOTE and C-BASS

      Anomalous Microwave Emission (AME) is a significant component of Galactic diffuse emission in the frequency range 10- $60\, \mathrm{GHz}$ and a new window into the properties of sub-nanometre-sized grains in the interstellar medium. We investigate the morphology of AME in the ≍10○ diameter λ Orionis ring by combining intensity data from the QUIJOTE

      Cepeda-Arroita, R. et al.

      Advertised on:

      5
      2021
    • 28-40 GHz variability and polarimetry of bright compact sources in the QUIJOTE cosmological fields

      We observed 51 sources in the Q-U-I JOint TEnerife (QUIJOTE) cosmological fields that were brighter than 1 Jy at 30 GHz in the Planck Point Source Catalogue (version 1), with the Very Large Array at 28-40 GHz, in order to characterize their high-radio-frequency variability and polarization properties. We find a roughly lognormal distribution of

      Perrott, Yvette C. et al.

      Advertised on:

      4
      2021
    • Fundamental physics with ESPRESSO: Towards an accurate wavelength calibration for a precision test of the fine-structure constant

      Observations of metal absorption systems in the spectra of distant quasars allow one to constrain a possible variation of the fine-structure constant throughout the history of the Universe. Such a test poses utmost demands on the wavelength accuracy and previous studies were limited by systematics in the spectrograph wavelength calibration. A

      Schmidt, Tobias M. et al.

      Advertised on:

      2
      2021
    • The Establishment of the Standard Cosmological Model Through Observations

      Over the last decades, observations with increasing quality have revolutionized our understanding of the general properties of the Universe. Questions posed for millenia by mankind about the origin, evolution and structure of the cosmos have found an answer. This has been possible mainly thanks to observations of the Cosmic Microwave Background, of

      Génova-Santos, Ricardo Tanausú

      Advertised on:

      6
      2020
    • Progress Report on the Large-Scale Polarization Explorer

      The large-scale polarization explorer (LSPE) is a cosmology program for the measurement of large-scale curl-like features (B-modes) in the polarization of the cosmic microwave background. Its goal is to constrain the background of inflationary gravity waves traveling through the universe at the time of matter-radiation decoupling. The two

      Lamagna, L. et al.

      Advertised on:

      4
      2020
    • Updated Design of the CMB Polarization Experiment Satellite LiteBIRD

      Recent developments of transition-edge sensors (TESs), based on extensive experience in ground-based experiments, have been making the sensor techniques mature enough for their application on future satellite cosmic microwave background (CMB) polarization experiments. LiteBIRD is in the most advanced phase among such future satellites, targeting

      Sugai, H. et al.

      Advertised on:

      1
      2020
    • Planck intermediate results. LVI. Detection of the CMB dipole through modulation of the thermal Sunyaev-Zeldovich effect: Eppur si muove II

      The largest temperature anisotropy in the cosmic microwave background (CMB) is the dipole, which has been measured with increasing accuracy for more than three decades, particularly with the Planck satellite. The simplest interpretation of the dipole is that it is due to our motion with respect to the rest frame of the CMB. Since current CMB

      Planck Collaboration et al.

      Advertised on:

      12
      2020
    • Planck intermediate results. LVII. Joint Planck LFI and HFI data processing

      We present the NPIPE processing pipeline, which produces calibrated frequency maps in temperature and polarization from data from the Planck Low Frequency Instrument (LFI) and High Frequency Instrument (HFI) using high-performance computers. NPIPE represents a natural evolution of previous Planck analysis efforts, and combines some of the most

      Planck Collaboration et al.

      Advertised on:

      11
      2020
    • Cosmic Amorphous Dust Model as the Origin of Anomalous Microwave Emission

      We 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 systems

      Nashimoto, Masashi et al.

      Advertised on:

      9
      2020
    • GroundBIRD: A CMB Polarization Experiment with MKID Arrays

      GroundBIRD 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 the

      Lee, K. et al.

      Advertised on:

      8
      2020

    Related talks

    No related talks were found.

    Related conferences

    • XIX Canary Islands Winter School of Astrophysics "The Cosmic Microwave | Background: from quantum fluctuations to the present Universe"

      Tenerife, Canary Islands
      Spain
      Date
      -
      Past
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