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
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52023 -
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52023 -
Measurement of the mean central optical depth of galaxy clusters via the pairwise kinematic Sunyaev-Zel'dovich effect with SPT-3G and DESWe infer the mean optical depth of a sample of optically selected galaxy clusters from the Dark Energy Survey via the pairwise kinematic Sunyaev-Zel'dovich (KSZ) effect. The pairwise KSZ signal between pairs of clusters drawn from the Dark Energy Survey Year-3 cluster catalog is detected at 4.1 σ in cosmic microwave background temperature maps fromSchiappucci, E. et al.
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OzDES Reverberation Mapping Program: Hβ lags from the 6-yr surveyReverberation mapping measurements have been used to constrain the relationship between the size of the broad-line region and luminosity of active galactic nuclei (AGN). This R-L relation is used to estimate single-epoch virial black hole masses, and has been proposed to use to standardize AGN to determine cosmological distances. We presentMalik, U. et al.
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Timing the r-process Enrichment of the Ultra-faint Dwarf Galaxy Reticulum IIThe ultra-faint dwarf galaxy Reticulum II (Ret II) exhibits a unique chemical evolution history, with ${72}_{-12}^{+10}$ % of its stars strongly enhanced in r-process elements. We present deep Hubble Space Telescope photometry of Ret II and analyze its star formation history. As in other ultra-faint dwarfs, the color-magnitude diagram is best fitSimon, Joshua D. et al.
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22023 -
Joint analysis of Dark Energy Survey Year 3 data and CMB lensing from SPT and Planck. I. Construction of CMB lensing maps and modeling choicesJoint analyses of cross-correlations between measurements of galaxy positions, galaxy lensing, and lensing of the cosmic microwave background (CMB) offer powerful constraints on the large-scale structure of the Universe. In a forthcoming analysis, we will present cosmological constraints from the analysis of such cross-correlations measured usingOmori, Y. et al.
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12023 -
Joint analysis of Dark Energy Survey Year 3 data and CMB lensing from SPT and Planck. III. Combined cosmological constraintsWe present cosmological constraints from the analysis of two-point correlation functions between galaxy positions and galaxy lensing measured in Dark Energy Survey (DES) Year 3 data and measurements of cosmic microwave background (CMB) lensing from the South Pole Telescope (SPT) and Planck. When jointly analyzing the DES-only two-point functionsAbbott, T. M. C. et al.
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Core-collapse supernovae in the Dark Energy Survey: luminosity functions and host galaxy demographicsWe present the luminosity functions and host galaxy properties of the Dark Energy Survey (DES) core-collapse supernova (CCSN) sample, consisting of 69 Type II and 50 Type Ibc spectroscopically and photometrically confirmed supernovae over a redshift range 0.045 < z < 0.25. We fit the observed DES griz CCSN light curves and K-correct to produce restGrayling, M. et al.
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32023 -
Concerning colour: The effect of environment on type Ia supernova colour in the dark energy surveyRecent analyses have found intriguing correlations between the colour (c) of type Ia supernovae (SNe Ia) and the size of their 'mass-step', the relationship between SN Ia host galaxy stellar mass (M stellar) and SN Ia Hubble residual, and suggest that the cause of this relationship is dust. Using 675 photometrically classified SNe Ia from the DarkKelsey, L. et al.
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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.
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32023 -
Covariance matrices for variance-suppressed simulationsCosmological N-body simulations provide numerical predictions of the structure of the Universe against which to compare data from ongoing and future surveys, but the growing volume of the Universe mapped by surveys requires correspondingly lower statistical uncertainties in simulations, usually achieved by increasing simulation sizes at the expenseZhang, Tony et al.
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12023 -
STRIDES: automated uniform models for 30 quadruply imaged quasarsGravitational time delays provide a powerful one-step measurement of H 0, independent of all other probes. One key ingredient in time-delay cosmography are high-accuracy lens models. Those are currently expensive to obtain, both, in terms of computing and investigator time (10 5-10 6 CPU hours and ~0.5-1 yr, respectively). Major improvements inSchmidt, T. et al.
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12023 -
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.
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22023 -
Lessons learned from the two largest Galaxy morphological classification catalogues built by convolutional neural networksWe compare the two largest galaxy morphology catalogues, which separate early- and late-type galaxies at intermediate redshift. The two catalogues were built by applying supervised deep learning (convolutional neural networks, CNNs) to the Dark Energy Survey data down to a magnitude limit of ~21 mag. The methodologies used for the construction ofCheng, T. -Y. et al.
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12023 -
Fitting of supernovae without dark energyWith data from Pantheon, we have at our disposal a sample of more than a 1000 supernovae Ia covering a wide range of redshifts with good precision. Here, we make fits to the corresponding Hubble-Lemaître diagram with various cosmological models, with intergalactic extinction, evolution of the luminosity of supernovae, and redshift components due toLópez-Corredoira, M. et al.
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82022 -
Hubble tensions: a historical statistical analysisStatistical analyses of measurements of the Hubble-Lemaître constant H 0 (163 measurements between 1976 and 2019) show that the statistical error bars associated with the observed parameter measurements have been underestimated - or the systematic errors were not properly taken into account - in at least 15-20 per cent of the measurements. The factLópez-Corredoira, Martín
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Virial theorem in clusters of galaxies with MONDA specific modification of Newtonian dynamics known as MOND has been shown to reproduce the dynamics of most astrophysical systems at different scales without invoking non-baryonic dark matter (DM). There is, however, a long-standing unsolved problem when MOND is applied to rich clusters of galaxies in the form of a deficit (by a factor around two)López-Corredoira, M. et al.
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122022 -
Overview of the Instrumentation for the Dark Energy Spectroscopic InstrumentThe Dark Energy Spectroscopic Instrument (DESI) embarked on an ambitious 5 yr survey in 2021 May to explore the nature of dark energy with spectroscopic measurements of 40 million galaxies and quasars. DESI will determine precise redshifts and employ the baryon acoustic oscillation method to measure distances from the nearby universe to beyond
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112022 -
Relativistic angular redshift fluctuations embedded in large scale varying gravitational potentialsWe compute the linear order, general relativistic corrections to angular redshift fluctuations (ARF), a new cosmological observable built upon density-weighted two-dimensional (2D) maps of galaxy redshifts. We start with an existing approach for galaxy/source counts developed in the Newtonian gauge, and generalize it to ARF, modifying for thisLima-Hernández, Adal et al.
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