Año de inicio
2012
Unidad organizativa
Institución organizadora
Subvenciones relacionadas:
General
Descripción
El Fondo Cósmico de Microondas (FCM) contiene la información estadística de las semillas primigenias que han dado lugar a la formación de todas las estructuras en el Universo. Su contrapartida natural en el Universo local es la distribución de las galaxias que surgen como resultado del crecimiento gravitatorio de aquellas fluctuaciones de densidad primigenias. La caracterización de la distribución de inhomogeneidades a gran escala en el Universo local proporciona una herramienta muy poderosa, y complementaria al FCM, para determinar el origen y el contenido energético del Universo, el ritmo de expansión del mismo durante la evolución cósmica, los detalles del proceso de formación de todas las estructuras a gran escala que observamos en el Universo hoy día. Esta es la página web del grupo de Cosmología con trazadores de la Estructura a Gran Escala (LSS de sus siglas en inglés), en el IAC.
Miembros
Investigador principal
FRANCISCO SHU
KITAURA JOYANES
Personal del proyecto
José Alberto
Rubiño Martín
Prof.
Rafael
Rebolo López
Juan E
Betancort Rijo
Martín
López Corredoira
Ricardo Tanausú
Genova Santos
Rafael Delfin
Barrena Delgado
Colaboradores
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
Resultados
- eBOSS: análisis cosmológico de los datos de cuásares. Marcos Pellejero Ibañez and F. S. Kitaura participaron en la construcción de la likelihood y en el análisis de los parámetros cosmológicos (including as coauthors Kitaura & Pellejero Ibañez: 2018MNRAS.473.4773A).
- EUCLID: proyecto comparativo de códigos para generar catálogos de galaxias sintéticos, donde se demostró la precisión y eficiencia de PATCHY (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)
- Desarrollo de un método para asignar el bias para estudios de estructura a gran escala (Balaguera-Antolínez, Kitaura, Pellejero Ibañez et al 2018: https://arxiv.org/abs/1806.05870)
- Presentación del proyecto UNITSIM para proporcionar modelos teóricos para comparar con observaciones DESI y EUCLID (including as coauthors Kitaura & Pellejero Ibañez:http://www.unitsims.org/ https://arxiv.org/abs/1811.02111)
- Presentación del código BARCODE (Bos, Kitaura & Weygaert 2018: https://arxiv.org/abs/1810.05189, http://adsabs.harvard.edu/abs/2018ascl.soft10002B)
Actividad científica
Publicaciones relacionadas
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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.
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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.
Fecha de publicación:
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.
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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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
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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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
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.
Fecha de publicación:
42023
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