Subvenciones relacionadas:
General
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
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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The miniJPAS survey: A preview of the Universe in 56 colorsThe Javalambre-Physics of the Accelerating Universe Astrophysical Survey (J-PAS) will scan thousands of square degrees of the northern sky with a unique set of 56 filters using the dedicated 2.55 m Javalambre Survey Telescope (JST) at the Javalambre Astrophysical Observatory. Prior to the installation of the main camera (4.2 deg 2 field-of-viewBonoli, S. et al.
Fecha de publicación:
92021 -
Euclid Preparation. XIV. The Complete Calibration of the Color-Redshift Relation (C3R2) Survey: Data Release 3The Complete Calibration of the Color-Redshift Relation (C3R2) survey is obtaining spectroscopic redshifts in order to map the relation between galaxy color and redshift to a depth of i ~ 24.5 (AB). The primary goal is to enable sufficiently accurate photometric redshifts for Stage IV dark energy projects, particularly Euclid and the Nancy GraceStanford, S. A. et al.
Fecha de publicación:
92021 -
Relation of internal attenuation, dust emission, and the size of spiral galaxies. Calibration at low-z and how to use it as a cosmological test at high-zAims: Dust in spiral galaxies produces emission in the far-infrared (FIR) and internal absorption in visible wavelengths. However, the relation of the two amounts is not trivial because optical absorption may saturate, but the FIR emission does not. Moreover, the volume concentration of dust plays a role in the relation of absorption and emissionLópez-Corredoira, M. et al.
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82021 -
Dark Energy Survey Year 3 results: Curved-sky weak lensing mass map reconstructionWe present reconstructed convergence maps, mass maps, from the Dark Energy Survey (DES) third year (Y3) weak gravitational lensing data set. The mass maps are weighted projections of the density field (primarily dark matter) in the foreground of the observed galaxies. We use four reconstruction methods, each is a maximum a posteriori estimate withJeffrey, N. et al.
Fecha de publicación:
82021 -
The Cluster HEritage project with XMM-Newton: Mass Assembly and Thermodynamics at the Endpoint of structure formation. I. Programme overviewThe Cluster HEritage project with XMM-Newton - Mass Assembly and Thermodynamics at the Endpoint of structure formation (CHEX-MATE) is a three-mega-second Multi-Year Heritage Programme to obtain X-ray observations of a minimally-biased, signal-to-noise-limited sample of 118 galaxy clusters detected by Planck through the Sunyaev-Zeldovich effect. TheCHEX-MATE Collaboration et al.
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62021 -
Cosmological parameter forecasts by a joint 2D tomographic approach to CMB and galaxy clusteringThe 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 itsBermejo-Climent, José Ramón et al.
Fecha de publicación:
52021 -
Simultaneous modelling of matter power spectrum and bispectrum in the presence of baryonsWe demonstrate that baryonification algorithms, which displace particles in gravity-only simulations according to physically motivated prescriptions, can simultaneously capture the impact of baryonic physics on the two and three-point statistics of matter. Specifically, we show that our implementation of a baryonification algorithm jointly fits theAricò, Giovanni et al.
Fecha de publicación:
52021 -
Density weighted angular redshift fluctuations: a new cosmological observableWe propose the use of angular fluctuations in the galaxy redshift field as a new way to extract cosmological information in the Universe. This new probe $\delta z (\hat{\mathbf {n}})$ consists of the statistics of sky maps built by projecting redshifts under a Gaussian window of width σ z centred upon a redshift z obs, and weighted by the galaxyHernández-Monteagudo, Carlos et al.
Fecha de publicación:
52021 -
Euclid preparation. XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomographyThe analysis of weak gravitational lensing in wide-field imaging surveys is considered to be a major cosmological probe of dark energy. Our capacity to constrain the dark energy equation of state relies on an accurate knowledge of the galaxy mean redshift ⟨z⟩. We investigate the possibility of measuring ⟨z⟩ with an accuracy better than 0.002 (1 + zEuclid Collaboration et al.
Fecha de publicación:
32021 -
Exact Semianalytical Calculation of Rotation Curves with Bekenstein-Milgrom Nonrelativistic MONDAstronomers derive MOdified Newtonian Dynamics (MOND) rotation curves using the simple algebraic rule of calculating the acceleration as equal to the Newtonian acceleration (a) divided by some factor μ(a). However, there are velocity differences between this simple rule and the calculation derived from more sophisticated MOND versions such as AQUALLópez-Corredoira, M. et al.
Fecha de publicación:
32021 -
Higher order Hamiltonian Monte Carlo sampling for cosmological large-scale structure analysisWe investigate higher order symplectic integration strategies within Bayesian cosmic density field reconstruction methods. In particular, we study the fourth-order discretization of Hamiltonian equations of motion (EoM). This is achieved by recursively applying the basic second-order leap-frog scheme (considering the single evaluation of the EoM)Hernández-Sánchez, Mónica et al.
Fecha de publicación:
42021 -
COSMIC BIRTH: efficient Bayesian inference of the evolving cosmic web from galaxy surveysWe present COSMIC BIRTH (COSMological Initial Conditions from Bayesian Inference Reconstructions with THeoretical models): an algorithm to reconstruct the primordial and evolved cosmic density fields from galaxy surveys on the light-cone. The displacement and peculiar velocity fields are obtained from forward modelling at different redshiftKitaura, Francisco-Shu et al.
Fecha de publicación:
42021 -
Cosmology and the massive photon frequency shift in the Standard-Model ExtensionThe total red shift z might be recast as a combination of the expansion red shift and a static shift due to the energy-momentum tensor non-conservation of a photon propagating through Electro-Magnetic (EM) fields. If massive, the photon may be described by the de Broglie-Proca (dBP) theory which satisfies the Lorentz(-Poincaré) Symmetry (LoSy) butSpallicci, Alessandro D. A. M. et al.
Fecha de publicación:
12021 -
Dark Energy Survey Year 1 results: the lensing imprint of cosmic voids on the cosmic microwave backgroundCosmic voids gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint on degree scales. We use the simulated CMB lensing convergence map from the Marenostrum Institut de Ciencias de l'Espai (MICE) N-body simulation to calibrate our detection strategy for a given void definition and galaxy tracer densityVielzeuf, P. et al.
Fecha de publicación:
12021 -
Constraining primordial non-Gaussianity with postreconstructed galaxy bispectrum in redshift spaceGalaxy bispectrum is a promising probe of inflationary physics in the early Universe as a measure of primordial non-Gaussianity (PNG), whereas its signal-to-noise ratio is significantly affected by the mode coupling due to nonlinear gravitational growth. In this paper, we examine the standard reconstruction method of linear cosmic mass densityShirasaki, Masato et al.
Fecha de publicación:
12021 -
BIRTH of the COSMOS field: primordial and evolved density reconstructions during cosmic high noonThis work presents the first comprehensive study of structure formation at the peak epoch of cosmic star formation over 1.4 ≤ z ≤ 3.6 in the Cosmic Evolution Survey (COSMOS) field, including the most massive high-redshift galaxy proto-clusters at that era. We apply the extended COSMIC BIRTH algorithm to account for a multitracer and multisurveyAta, Metin et al.
Fecha de publicación:
12021 -
Planck intermediate results. LVI. Detection of the CMB dipole through modulation of the thermal Sunyaev-Zeldovich effect: Eppur si muove IIThe 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 CMBPlanck Collaboration et al.
Fecha de publicación:
122020 -
Euclid preparation. X. The Euclid photometric-redshift challengeForthcoming large photometric surveys for cosmology require precise and accurate photometric redshift (photo-z) measurements for the success of their main science objectives. However, to date, no method has been able to produce photo-zs at the required accuracy using only the broad-band photometry that those surveys will provide. An assessment ofEuclid Collaboration et al.
Fecha de publicación:
122020 -
Euclid preparation. VIII. The Complete Calibration of the Colour-Redshift Relation survey: VLT/KMOS observations and data releaseThe Complete Calibration of the Colour-Redshift Relation survey (C3R2) is a spectroscopic effort involving ESO and Keck facilities designed specifically to empirically calibrate the galaxy colour-redshift relation - P(z|C) to the Euclid depth (i AB = 24.5) and is intimately linked to the success of upcoming Stage IV dark energy missions based onEuclid Collaboration et al.
Fecha de publicación:
102020 -
Euclid preparation. VII. Forecast validation for Euclid cosmological probesAims: The Euclid space telescope will measure the shapes and redshifts of galaxies to reconstruct the expansion history of the Universe and the growth of cosmic structures. The estimation of the expected performance of the experiment, in terms of predicted constraints on cosmological parameters, has so far relied on various individual methodologiesEuclid Collaboration et al.
Fecha de publicación:
102020
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XXXIII Escuela de Invierno de Canarias sobre Astrofísica: Física de Astropartículas y CosmologíaLa XXXIII Canary Islands Winter School of Astrophysics, organizada por el Instituto de Astrofísica de Canarias (IAC), se centra en la Física de Partículas y la Cosmología. La escuela, que se celebrará"Salón de actos" del Museo de la Ciencia y el Cosmos (MCC) Avda. Los Menceyes 70 38205 San Cristóbal de La LagunaEspañaFecha-Anteriores