Cosmology with Large Scale Structure Probes

Start year
2012
Organizational Unit

Grants related:

    General
    Description

    The Cosmic Microwave Background (CMB) contains the statistical information about the early seeds of the structure formation in our Universe. Its natural counterpart in the local universe is the distribution of galaxies that arises as a result of gravitational growth of those primordial and small density fluctuations. The characterization of the distribution of inhomogeneities at large-scale in the local Universe provides a powerful tool, complementary to the CMB, to determine the origin and the energy content of the Universe, the expansion rate of the Universe during the cosmic history, and the detailed process of formation of the large-scale structures (LSS). The study of the LSS in the coming years will attempt to address the following open questions in cosmology:

    What is the dark matter, and which is its detailed contribution to the energy content of the Universe?

    What is the dark energy, and how it affects the dynamics of the Universe?

    What is the connection between large scale structure and galaxy formation?

    Do fundamental constants vary along the history of the Universe?

    Is there evidence for primordial non-Gaussianities giving information on the details of the inflationary expansion epoch of the Universe?

    In order to contribute to the possible answer to those questions, in this project we will use several large scale structure probes:

    The distribution and large-scale clustering of the galaxies, and its evolution with time. The matter power spectrum (P(k)) and the two-point correlation function (ξ(r)) contain certain geometric features associated to some characteristic length-scales in the Universe, as the horizon at matter-radiation equality, or the acoustic horizon at last scattering. In particular, the latter determines the Baryon Acoustic Oscillation (BAO) scale.

    The higher order statistics: the three-point statistics characterizes the deviation from Gaussinity and therefore the structure formation through gravitational instability, the galaxy bias, and the primordial non-Gaussianities.

    The distribution of the cosmic voids in the Universe. Both the statistics of big voids, as well as the characterization of the void expansion, provides a complementary tool to determine the matter density and the equation of state of the dark energy. Cosmic voids contain information of the higher order statistics of galaxies and can be used to further constrain the BAO scale.

    The cosmic web can be used to characterize the formation of structures and relate the large scale structure with galaxy formation processes.

    The distribution and abundance of galaxy clusters, as well as the evolution with time. Among other parameters, the cluster mass function depends both on the matter density as well as in the amplitude of the power spectrum. The time evolution of the mass function n(M,z) is also govern by the growth of structures in the Universe, thus being also sensitive to the equation of state of the dark energy.

    Principal investigator
    Project staff
    1. eBOSS: cosmological analysis from the quasar sample. Marcos Pellejero Ibañez and F. S. Kitaura participated in the construction of the likelihood and the cosmological parameter estimation (including as coauthors Kitaura & Pellejero Ibañez: 2018MNRAS.473.4773A).
    2. EUCLID: comparison project of mock galaxy catalogue generating codes showing the accuracy and speed of the PATCHY code (including as coauthors Balaguera-Antolínez, Kitaura & Pellejero Ibañez:https://arxiv.org/abs/1806.09497, https://arxiv.org/abs/1806.09477, https://arxiv.org/abs/1806.09499)
    3. Development of an accurate Bias mapping method for large scale structure analysis (Balaguera-Antolínez, Kitaura, Pellejero Ibañez et al 2018:https://arxiv.org/abs/1806.05870)
    4. Presentation of the UNITSIM project to provide simulations for the theoretical model comparison for DESI and EUCLID (including as coauthors Kitaura & Pellejero Ibañez:http://www.unitsims.org/ https://arxiv.org/abs/1811.02111)
    5. Presentation of BARCODE (Bos, Kitaura & Weygaert 2018: https://arxiv.org/abs/1810.05189, http://adsabs.harvard.edu/abs/2018ascl.soft10002B)

    Related publications

    • Density distribution of the cosmological matter field

      The one-point probability distribution function (PDF) of the matter density field in the universe is a fundamental property that plays an essential role in cosmology for estimates such as gravitational weak lensing, non-linear clustering, massive production of mock galaxy catalogues, and testing predictions of cosmological models. Here we make a

      Klypin, A. et al.

      Advertised on:

      12
      2018
      Citations
      33
    • Characterization of a subsample of the Planck SZ source cluster catalogues using optical SDSS DR12 data

      Aims: The Planck catalogues of Sunyaev -Zeldovich (SZ) sources, PSZ1 and PSZ2, are the largest catalogues of galaxy clusters selected through their SZ signature in the full sky. In 2013, we started a long-term observational programme at Canary Island observatories with the aim of validating ˜500 unconfirmed SZ sources. In this work we present

      Streblyanska, A. et al.

      Advertised on:

      9
      2018
      Citations
      13
    • The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: a tomographic analysis of structure growth and expansion rate from anisotropic galaxy clustering

      We perform a tomographic analysis of structure growth and expansion rate from the anisotropic galaxy clustering of the combined sample of Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12, which covers the redshift range of 0.2 < z < 0.75. In order to extract the redshift information of anisotropic galaxy clustering, we analyse this

      Wang, Y. et al.

      Advertised on:

      12
      2018
      Citations
      47
    • Gravitational lensing detection of an extremely dense environment around a galaxy cluster

      Galaxy clusters form at the highest-density nodes of the cosmic web1,2. The clustering of dark matter halos hosting these galaxy clusters is enhanced relative to the general mass distribution, with the matter density beyond the virial region being strongly correlated to the halo mass (halo bias)3. Halo properties other than mass can further enhance

      Sereno, M. et al.

      Advertised on:

      7
      2018
      Citations
      14
    • Optical validation and characterization of Planck PSZ1 sources at the Canary Islands observatories. I. First year of ITP13 observations

      We have identified new clusters and characterized previously unknown Planck Sunyaev-Zeldovich (SZ) sources from the first Planck catalogue of SZ sources (PSZ1). The results presented here correspond to an optical follow-up observational programme developed during approximately one year (2014) at Roque de los Muchachos Observatory, using the 2.5 m

      Barrena, R. et al.

      Advertised on:

      8
      2018
      Citations
      22
    • Impact of young stellar components on quiescent galaxies: deconstructing cosmic chronometers

      Context. Cosmic chronometers may be used to measure the age difference between passively evolving galaxy populations to calculate the Hubble parameter H(z) as a function of redshift z. The age estimator emerges from the relationship between the amplitude of the rest frame Balmer break at 4000 Å and the age of a galaxy, assuming that there is one

      López-Corredoira, M. et al.

      Advertised on:

      7
      2018
      Citations
      25
    • Optical Identifications of High-Redshift Galaxy Clusters from the Planck Sunyaev-Zeldovich Survey

      We present the results of optical identifications and spectroscopic redshift measurements for galaxy clusters from the second Planck catalogue of Sunyaev-Zeldovich sources (PSZ2) located at high redshifts, z ≈ 0.7-0.9. We used the data of optical observations with the Russian-Turkish 1.5-mtelescope (RTT-150), the Sayan Observatory 1.6-m telescope

      Burenin, R. A. et al.

      Advertised on:

      5
      2018
      Citations
      23
    • The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment

      The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014–2016 July) public

      Abolfathi, B. et al.

      Advertised on:

      4
      2018
      Citations
      890
    • Exploring cosmic origins with CORE: Cluster science

      We examine the cosmological constraints that can be achieved with a galaxy cluster survey with the future CORE space mission. Using realistic simulations of the millimeter sky, produced with the latest version of the Planck Sky Model, we characterize the CORE cluster catalogues as a function of the main mission performance parameters. We pay

      Melin, J.-B. et al.

      Advertised on:

      4
      2018
      Citations
      24
    • Evidence of a truncated spectrum in the angular correlation function of the cosmic microwave background

      Aim. The lack of large-angle correlations in the fluctuations of the cosmic microwave background (CMB) conflicts with predictions of slow-roll inflation. But while probabilities (≲0.24%) for the missing correlations disfavour the conventional picture at ≳3σ, factors not associated with the model itself may be contributing to the tension. Here we

      Melia, F. et al.

      Advertised on:

      3
      2018
      Citations
      26
    • Extracting cosmological information from the angular power spectrum of the 2MASS Photometric Redshift catalogue

      Using the almost all-sky 2MASS Photometric Redshift catalogue (2MPZ) we perform for the first time a tomographic analysis of galaxy angular clustering in the local Universe (z < 0.24). We estimate the angular auto- and cross-power spectra of 2MPZ galaxies in three photometric redshift bins, and use dedicated mock catalogues to assess their errors

      Balaguera-Antolínez, A. et al.

      Advertised on:

      5
      2018
      Citations
      26
    • Tracing the cosmic web

      The cosmic web is one of the most striking features of the distribution of galaxies and dark matter on the largest scales in the Universe. It is composed of dense regions packed full of galaxies, long filamentary bridges, flattened sheets and vast low-density voids. The study of the cosmic web has focused primarily on the identification of such

      Libeskind, N. I. et al.

      Advertised on:

      1
      2018
      Citations
      204
    • The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: first measurement of baryon acoustic oscillations between redshift 0.8 and 2.2

      We present measurements of the Baryon Acoustic Oscillation (BAO) scale in redshift-space using the clustering of quasars. We consider a sample of 147 000 quasars from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) distributed over 2044 square degrees with redshifts 0.8 < z < 2.2 and measure their spherically averaged clustering in

      Ata, M. et al.

      Advertised on:

      2
      2018
      Citations
      340
    • Alcock-Paczynski test with model-independent BAO data

      Cosmological tests based on the statistical analysis of galaxy distributions usually depend on source evolution. An exception is the Alcock–Paczyński (AP) test, which is based on the changing ratio of angular to spatial/redshift size of (presumed) spherically-symmetric source distributions with distance. Intrinsic redshift distortions due to

      Melia, F. et al.

      Advertised on:

      5
      2017
      Citations
      31
    • Galactic wind X-ray heating of the intergalactic medium during the Epoch of Reionization

      The diffuse soft X-ray emissivity from galactic winds is computed during the Epoch of Reionization (EoR). We consider two analytic models, a pressure-driven wind and a superbubble model, and a 3D cosmological simulation including gas dynamics from the First Billion Years (FiBY) project. The analytic models are normalized to match the diffuse X-ray

      Meiksin, A. et al.

      Advertised on:

      11
      2017
      Citations
      6
    • Accurate halo-galaxy mocks from automatic bias estimation and particle mesh gravity solvers

      Reliable extraction of cosmological information from clustering measurements of galaxy surveys requires estimation of the error covariance matrices of observables. The accuracy of covariance matrices is limited by our ability to generate sufficiently large number of independent mock catalogues that can describe the physics of galaxy clustering

      Vakili, M. et al.

      Advertised on:

      12
      2017
      Citations
      13
    • Tests and Problems of the Standard Model in Cosmology

      The main foundations of the standard Λ CDM model of cosmology are that: (1) the redshifts of the galaxies are due to the expansion of the Universe plus peculiar motions; (2) the cosmic microwave background radiation and its anisotropies derive from the high energy primordial Universe when matter and radiation became decoupled; (3) the abundance

      López-Corredoira, M.

      Advertised on:

      6
      2017
      Citations
      37
    • Testing approximate predictions of displacements of cosmological dark matter halos

      We present a test to quantify how well some approximate methods, designed to reproduce the mildly non-linear evolution of perturbations, are able to reproduce the clustering of DM halos once the grouping of particles into halos is defined and kept fixed. The following methods have been considered: Lagrangian Perturbation Theory (LPT) up to third

      Munari, E. et al.

      Advertised on:

      7
      2017
      Citations
      13
    • Growth of First Galaxies: Impacts of Star Formation and Stellar Feedback

      Recent observations have detected galaxies at high-redshift z∼ 6{--}11, and revealed the diversity of their physical properties, from normal star-forming galaxies to starburst galaxies. To understand the properties of these observed galaxies, it is crucial to understand the star formation (SF) history of high-redshift galaxies under the influence

      Yajima, H. et al.

      Advertised on:

      9
      2017
      Citations
      30
    • The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample

      We present cosmological results from the final galaxy clustering data set of the Baryon Oscillation Spectroscopic Survey, part of the Sloan Digital Sky Survey III. Our combined galaxy sample comprises 1.2 million massive galaxies over an effective area of 9329 deg2 and volume of 18.7 Gpc3, divided into three partially overlapping redshift slices

      Alam, S. et al.

      Advertised on:

      9
      2017
      Citations
      1000

    Related talks

    No related talks were found.

    Related conferences

    • Winter School 2022 Poster
      XXXIII Canary Islands Winter School of Astrophysics: Astroparticle Physics and Cosmology

      The XXXIII Canary Islands Winter School of Astrophysics, organized by the Instituto de Astrofísica de Canarias (IAC), focuses onAstroparticle Physics and Cosmology. The school, to be held in San

      "Salón de actos" at the Museo de la Ciencia y el Cosmos (MCC) Avda. Los Menceyes 70 38205 San Cristóbal de La Laguna
      Spain
      Date
      -
      Past