Start year
2012
Organizational Unit
Organizing institutions
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.
Members
Principal investigator
FRANCISCO SHU
KITAURA JOYANES
Project staff
José Alberto
Rubiño Martín
Prof.
Rafael
Rebolo López
Juan E
Betancort Rijo
Martín
López Corredoira
Ricardo Tanausú
Genova Santos
Rafael Delfin
Barrena Delgado
Collaborators
José Javier
Díaz García
Dr.
A. Hempel
Dr.
F. Atrio-Barandela
Dr.
S. Patiri
Dr.
A.J. Cuesta Vázquez
Dr.
A.D. Montero Dorta
Dr.
F. Prada
Dr.
M.A. Sánchez Conde
Dr.
S. Gottlaber
Dr.
A. Klypin
Dr.
Sylos-Labini
Dr.
C. Hernández-Monteagudo
Dr.
A. Pérez Garrido
Dr.
A. Díaz Sánchez
Dr.
I. Villo
Dr.
R. Toledo
Dr.
C. Zhao
Results
- 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).
- 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)
- 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)
- 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)
- Presentation of BARCODE (Bos, Kitaura & Weygaert 2018: https://arxiv.org/abs/1810.05189, http://adsabs.harvard.edu/abs/2018ascl.soft10002B)
Scientific activity
Related publications
-
A sample of dust attenuation laws for Dark Energy Survey supernova host galaxiesContext. Type Ia supernovae (SNe Ia) are useful distance indicators in cosmology, provided their luminosity is standardized by applying empirical corrections based on light-curve properties. One factor behind these corrections is dust extinction, which is accounted for in the color-luminosity relation of the standardization. This relation isDuarte, J. et al.
Advertised on:
122023 -
Chemical Analysis of the Brightest Star of the Cetus II Ultrafaint Dwarf Galaxy CandidateWe present a detailed chemical abundance analysis of the brightest star in the ultrafaint dwarf (UFD) galaxy candidate Cetus II from high-resolution Magellan/MIKE spectra. For this star, DES J011740.53-173053, abundances or upper limits of 18 elements from carbon to europium are derived. Its chemical abundances generally follow those of other UFDWebber, K. B. et al.
Advertised on:
122023 -
J-PLUS: Photometric Recalibration with the Stellar Color Regression Method and an Improved Gaia XP Synthetic Photometry MethodWe employ the corrected Gaia Early Data Release 3 photometric data and spectroscopic data from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR7 to assemble a sample of approximately 0.25 million FGK dwarf photometric standard stars for the 12 J-PLUS filters using the stellar color regression (SCR) method. We thenXiao, Kai et al.
Advertised on:
122023 -
3D correlations in the Lyman-α forest from early DESI dataWe present the first measurements of Lyman-α (Lyα) forest correlations using early data from the Dark Energy Spectroscopic Instrument (DESI). We measure the auto-correlation of Lyα absorption using 88 509 quasars at z > 2, and its cross-correlation with quasars using a further 147 899 tracer quasars at z ≳ 1.77. Then, we fit these correlationsGordon, C. et al.
Advertised on:
112023 -
Beyond the 3rd moment: a practical study of using lensing convergence CDFs for cosmology with DES Y3Widefield surveys probe clustered scalar fields - such as galaxy counts, lensing potential, etc. - which are sensitive to different cosmological and astrophysical processes. Constraining such processes depends on the statistics that summarize the field. We explore the cumulative distribution function (CDF) as a summary of the galaxy lensingAnbajagane, D. et al.
Advertised on:
122023 -
Photometry of Outer Solar System Objects from the Dark Energy Survey. I. Photometric Methods, Light-curve Distributions, and Trans-Neptunian BinariesWe report the methods of and initial scientific inferences from the extraction of precision photometric information for the >800 trans-Neptunian objects (TNOs) discovered in the images of the Dark Energy Survey (DES). Scene-modeling photometry is used to obtain shot-noise-limited flux measures for each exposure of each TNO, with background sourcesBernardinelli, Pedro H. et al.
Advertised on:
112023 -
The Dark Energy Spectroscopic Instrument: one-dimensional power spectrum from first Ly α forest samples with Fast Fourier TransformWe present the one-dimensional Ly α forest power spectrum measurement using the first data provided by the Dark Energy Spectroscopic Instrument (DESI). The data sample comprises 26 330 quasar spectra, at redshift z > 2.1, contained in the DESI Early Data Release and the first 2 months of the main survey. We employ a Fast Fourier Transform (FFT)Ravoux, Corentin et al.
Advertised on:
122023 -
Rates and properties of Type Ia supernovae in galaxy clusters within the dark energy surveyWe identify 66 photometrically classified Type Ia supernovae (SNe Ia) from the Dark Energy Survey (DES) that have occurred within red-sequence selected galaxy clusters. We compare light-curve and host galaxy properties of the cluster SNe to 1024 DES SNe Ia located in field galaxies, the largest comparison of two such samples at high redshift (z > 0Toy, M. et al.
Advertised on:
122023 -
Void BAO measurements on quasars from eBOSSWe present the clustering of voids based on the quasar (QSO) sample of the extended Baryon Oscillation Spectroscopic Survey Data Release 16 in configuration space. We define voids as overlapping empty circumspheres computed by Delaunay tetrahedra spanned by quartets of quasars, allowing for an estimate of the depth of underdense regions. ToTamone, Amélie et al.
Advertised on:
122023 -
DES Y3 cosmic shear down to small scales: Constraints on cosmology and baryonsWe present the first analysis of cosmic shear measured in DES Y3 that employs the entire range of angular scales in the data. To achieve this, we built upon recent advances in the theoretical modelling of weak lensing provided by a combination of N-body simulations, physical models of baryonic processes, and neural networks. Specifically, we usedAricò, Giovanni et al.
Advertised on:
102023 -
Revisiting constraints on the photon rest mass with cosmological fast radio burstsFast radio bursts (FRBs) have been suggested as an excellent celestial laboratory for testing the zero-mass hypothesis of the photon. In this work, we use the dispersion measure (DM)-redshift measurements of 23 localized FRBs to revisit the photon rest mass m γ . As an improvement over previous studies, here we take into account the more realisticWang, Bao et al.
Advertised on:
92023 -
Synchronous Rotation in the (136199) Eris-Dysnomia SystemWe combine photometry of Eris from a 6 month campaign on the Palomar 60 inch telescope in 2015, a 1 month Hubble Space Telescope WFC3 campaign in 2018, and Dark Energy Survey data spanning 2013-2018 to determine a light curve of definitive period 15.771 ± 0.008 days (1σ formal uncertainties), with nearly sinusoidal shape and peak-to-peak fluxBernstein, Gary M. et al.
Advertised on:
62023 -
DESI mock challenge. Halo and galaxy catalogues with the bias assignment methodContext. We present a novel approach to the construction of mock galaxy catalogues for large-scale structure analysis based on the distribution of dark matter halos obtained with effective bias models at the field level. Aims: We aim to produce mock galaxy catalogues capable of generating accurate covariance matrices for a number of cosmologicalBalaguera-Antolínez, Andrés et al.
Advertised on:
52023 -
J-PLUS: characterization of high-velocity stars in the second data releaseHigh-velocity stars in the Milky Way are related to extreme astrophysical phenomena. In this work, we characterize 28 stars with Galactocentric velocities higher than 400 $\mathrm{km\, s^{-1}}$ observed in the Javalambre Photometric Local Universe Survey Data Release 2 (J-PLUS DR2) survey. We combine J-PLUS photometry with astrometric data from theQuispe-Huaynasi, F. et al.
Advertised on:
72023 -
The Dark Energy Survey Supernova Program: Corrections on Photometry Due to Wavelength-dependent Atmospheric EffectsWavelength-dependent atmospheric effects impact photometric supernova flux measurements for ground-based observations. We present corrections on supernova flux measurements from the Dark Energy Survey Supernova Program's 5YR sample (DES-SN5YR) for differential chromatic refraction (DCR) and wavelength-dependent seeing, and we show their impact onLee, J. et al.
Advertised on:
62023 -
Ultracool dwarfs candidates based on 6 yr of the Dark Energy Survey dataWe present a sample of 19 583 ultracool dwarf candidates brighter than z ≤23 selected from the Dark Energy Survey DR2 coadd data matched to VHS DR6, VIKING DR5, and AllWISE covering ~ 480 deg 2. The ultracool candidates were first pre-selected based on their (i-z), (z-Y), and (Y-J) colours. They were further classified using a method that comparesdal Ponte, M. et al.
Advertised on:
62023 -
Dark Energy Survey Year 3 results: Constraints on extensions to Λ CDM with weak lensing and galaxy clusteringWe constrain six possible extensions to the Λ cold dark matter (CDM) model using measurements from the Dark Energy Survey's first three years of observations, alone and in combination with external cosmological probes. The DES data are the two-point correlation functions of weak gravitational lensing, galaxy clustering, and their cross-correlationAbbott, T. M. C. et al.
Advertised on:
42023 -
Cosmic void exclusion models and their impact on the distance scale measurements from large-scale structureBaryonic Acoustic Oscillations (BAOs) studies based on the clustering of voids and matter tracers provide important constraints on cosmological parameters related to the expansion of the Universe. However, modelling the void exclusion effect is an important challenge for fully exploiting the potential of this kind of analyses. We thus develop twoVariu, Andrei et al.
Advertised on:
52023 -
J-NEP: 60-band photometry and photometric redshifts for the James Webb Space Telescope North Ecliptic Pole Time-Domain FieldThe Javalambre-Physics of the Accelerating Universe Astrophysical Survey (J-PAS) will observe approximately one-third of the northern sky with a set of 56 narrow-band filters using the dedicated 2.55 m Javalambre Survey Telescope (JST) at the Javalambre Astrophysical Observatory. Prior to the installation of the main camera, in order to demonstrateHernán-Caballero, A. et al.
Advertised on:
32023 -
The miniJPAS survey quasar selection - I. Mock catalogues for classificationIn this series of papers, we employ several machine learning (ML) methods to classify the point-like sources from the miniJPAS catalogue, and identify quasar candidates. Since no representative sample of spectroscopically confirmed sources exists at present to train these ML algorithms, we rely on mock catalogues. In this first paper, we develop aQueiroz, Carolina et al.
Advertised on:
42023
Related talks
No related talks were found.Related conferences
-
XXXIII Canary Islands Winter School of Astrophysics: Astroparticle Physics and CosmologyThe XXXIII Canary Islands Winter School of Astrophysics, organized by the Instituto de Astrofísica de Canarias (IAC), focuses on Astroparticle 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 LagunaSpainDate-Past
