Subvenciones relacionadas:
General
Dos cuestiones fundamentales en la Astrofísica son la conversión de gas molecuar en estrellas y cómo este proceso físico depende del entorno en todas las escalas, desde sistemas planetarios, cúmulos estelares, galaxias hasta cúmulos de galaxias. El objectivo principal de este proyecto es el de estudiar la formación y evolución de galaxias a partir de la materia interstellar. Por ello, estudiaremos el gas molecuar frío, el combustible de la formación estelar y el polvo, producto residual del proceso de formación, en galaxias a través del tiempo cósmico. Los estudios están basados, sobre todo, en observaciones en el infrarrojo lejano y en el radio. Nos centraremos en observaciones con interferómetros de radio como son NOEMA, ALMA, ATCA, SMA y VLA. Se preveen estrechas colaboraciones con otros proyectos del IAC, sobre todo para observaciones de galaxias con telescopios de radio. El grupo de trabajo caracterizará las propiedades de la formación estelar de galaxias masivas en el universo lejano a través del tiempo cósmico. Esto nos dará la oportunidad de estudiar la secuencia de formación de galaxias con brote estelar. Además, este grupo de trabajo investigará fuentes selecionadas desde cúmulos de galaxias y del campo para explorar la evolución de galaxias en funcion del entorno. Además, realizaremos estudios complementarios de galaxias locales (seleccionadas desde CALIFA y WEAVE-APERTIF) que servirán de referencia para investigaciones futuras de galaxias a alto redshift.
Miembros
Resultados
- Observaciones de follow-up de una galaxia amplificada con brote estelar a z=2.04 con el radio interferómetro IRAM NOEMA descubrío propiedades del gas molecular extraordinaras y revelo la emision más alta en gas molecuar jamas visto en el universo distante; Dannerbauer et al. 2019, AJ, in prensa (astro-ph/1812.03845).
- Contribuciones con varios articulos de co-autor (parte de colaboraciones internacionales) a la investigacion de cúmulos de galaxias en formacion en el universo lejano y sus miembros via estudios de multi-longitud de ondas.
- Otorgada ayuda externa via el plan naciónal de MINECO para 2018 y 2019 incluyendo fondos para contrarar un postdoc por dos años (AYA2017-84061-P: ´De las primeras sobre-densidades a los proto-cumulos ycúmulos: el papel del entorno´, 141.570 Euro, IP1: H. Dannerbauer, IP2: J. M. Rodríguez-Espinosa).
- Concedido tiempo de observaciones para continuar y finalizar el ATCA programa larga 'COALAS: CO ATCA Legacy Archive of Star-Forming Galaxies' (IP: Helmut Dannerbauer), en total 640 horas (~500.000 Euro). Concedido el IRAM NOEMA programa larga ‘A Comprehensive NOEMA Redshift Survey of the Brightest Herschel Galaxies’ (CoIP: Dannerbauer) of 191 hrs. (~770.000 Euro).
- Organización del mini-symposium 'Build-Up of Galaxy Clusters' durante la IAU XXX Assamblea General en Viena en Agosto de 2018 y del splinter "Collaborative GTC-LMT projects" durante el GTC congreso en Valencia en Diciembre de 2018.
Actividad científica
Publicaciones relacionadas
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Consistency of cosmic shear analyses in harmonic and real spaceRecent cosmic shear studies have reported discrepancies of up to 1σ on the parameter ${S_{8}=\sigma _{8}\sqrt{{\Omega _{\rm m}}/0.3}}$ between the analysis of shear power spectra and two-point correlation functions, derived from the same shear catalogues. It is not a priori clear whether the measured discrepancies are consistent with statisticalDoux, C. et al.
Fecha de publicación:
52021 -
No Evidence for Orbital Clustering in the Extreme Trans-Neptunian ObjectsThe apparent clustering in longitude of perihelion ϖ and ascending node Ω of extreme trans-Neptunian objects (ETNOs) has been attributed to the gravitational effects of an unseen 5-10 Earth-mass planet in the outer solar system. To investigate how selection bias may contribute to this clustering, we consider 14 ETNOs discovered by the Dark EnergyNapier, K. J. et al.
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42021 -
A titanic interstellar medium ejection from a massive starburst galaxy at redshift 1.4Feedback-driven winds from star formation or active galactic nuclei might be a relevant channel for the abrupt quenching of star formation in massive galaxies. However, both observations and simulations support the idea that these processes are non-conflictingly co-evolving and self-regulating. Furthermore, evidence of disruptive events that arePuglisi, Annagrazia et al.
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02021 -
The infrared-radio correlation of star-forming galaxies is strongly M<SUB>⋆</SUB>-dependent but nearly redshift-invariant since z ∼ 4Over the past decade, several works have used the ratio between total (rest 8‒1000 μm) infrared and radio (rest 1.4 GHz) luminosity in star-forming galaxies (q IR), often referred to as the infrared-radio correlation (IRRC), to calibrate the radio emission as a star formation rate (SFR) indicator. Previous studies constrained the evolution of q IRDelvecchio, I. et al.
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32021 -
The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev–Zel’dovich Galaxy ClustersWe present a catalog of 4195 optically confirmed Sunyaev–Zel’dovich (SZ) selected galaxy clusters detected with signal-to-noise ratio >4 in 13,211 deg 2 of sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were selected by applying a multifrequency matched filter to 98 and 150 GHz maps constructed from ACT observationsHilton, M. et al.
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32021 -
Dark energy survey year 1 results: Constraining baryonic physics in the UniverseMeasurements of large-scale structure are interpreted using theoretical predictions for the matter distribution, including potential impacts of baryonic physics. We constrain the feedback strength of baryons jointly with cosmology using weak lensing and galaxy clustering observables (3 × 2pt) of Dark Energy Survey (DES) Year 1 data in combinationHuang, Hung-Jin et al.
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42021 -
The WaZP galaxy cluster sample of the dark energy survey year 1We present a new (2+1)D galaxy cluster finder based on photometric redshifts called Wavelet Z Photometric (WaZP) applied to DES first year (Y1A1) data. The results are compared to clusters detected by the South Pole Telescope (SPT) survey and the redMaPPer cluster finder, the latter based on the same photometric data. WaZP searches for clusters inAguena, M. et al.
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42021 -
CO Excitation, Molecular Gas Density, and Interstellar Radiation Field in Local and High-redshift GalaxiesWe study the carbon monoxide (CO) excitation, mean molecular gas density, and interstellar radiation field (ISRF) intensity in a comprehensive sample of 76 galaxies from local to high redshift (z ∼ 0-6), selected based on detections of their CO transitions J = 2 → 1 and 5 → 4 and their optical/infrared/(sub)millimeter spectral energy distributionsLiu, Daizhong et al.
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32021 -
The interstellar medium of quiescent galaxies and its evolution with timeWe characterise the basic far-IR properties and the gas mass fraction of massive (⟨log(M */M ⊙)⟩ ≈ 11.0) quiescent galaxies (QGs) and explore how these evolve from z = 2.0 to the present day. We use robust, multi-wavelength (mid- to far-IR and sub-millimetre to radio) stacking ensembles of homogeneously selected and mass complete samples of log(M *Magdis, Georgios E. et al.
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32021 -
Probing the existence of a rich galaxy overdensity at z = 5.2We report the results of a pilot spectroscopic program of a region at z = 5.2 in the GOODS-N field containing an overdensity of galaxies around the well-known submillimetre galaxy (SMG) HDF850.1. We have selected candidate cluster members from the optical 25 medium-band photometric catalogue of the project SHARDS (Survey for High-z Absorption RedCalvi, Rosa et al.
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42021 -
Close-up view of a luminous star-forming galaxy at z = 2.95Exploiting the sensitivity of the IRAM NOrthern Extended Millimeter Array (NOEMA) and its ability to process large instantaneous bandwidths, we have studied the morphology and other properties of the molecular gas and dust in the star forming galaxy, H-ATLAS J131611.5+281219 (HerBS-89a), at z = 2.95. High angular resolution (0 .″3) images reveal aBerta, S. et al.
Fecha de publicación:
22021 -
Turbulent Gas in Lensed Planck-selected Starbursts at z ∼ 1-3.5Dusty star-forming galaxies at high redshift (1 < z < 3) represent the most intense star-forming regions in the universe. Key aspects to these processes are the gas heating and cooling mechanisms, and although it is well known that these galaxies are gas-rich, little is known about the gas excitation conditions. Only a few detailed radiativeHarrington, Kevin C. et al.
Fecha de publicación:
22021 -
Cosmological constraints from DES Y1 cluster abundances and SPT multiwavelength dataWe perform a joint analysis of the counts of redMaPPer clusters selected from the Dark Energy Survey (DES) year 1 data and multiwavelength follow-up data collected within the 2500 deg 2 South Pole Telescope (SPT) Sunyaev-Zel'dovich (SZ) survey. The SPT follow-up data, calibrating the richness-mass relation of the optically selected redMaPPerCostanzi, M. et al.
Fecha de publicación:
22021 -
DES Y1 results: Splitting growth and geometry to test Λ CDMWe analyze Dark Energy Survey (DES) data to constrain a cosmological model where a subset of parameters—focusing on Ω m—are split into versions associated with structure growth (e.g., Ω m grow) and expansion history (e.g., Ω m geo). Once the parameters have been specified for the Λ CDM cosmological model, which includes general relativity as aMuir, J. et al.
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12021 -
A machine learning approach to galaxy properties: joint redshift-stellar mass probability distributions with Random ForestWe demonstrate that highly accurate joint redshift-stellar mass probability distribution functions (PDFs) can be obtained using the Random Forest (RF) machine learning (ML) algorithm, even with few photometric bands available. As an example, we use the Dark Energy Survey (DES), combined with the COSMOS2015 catalogue for redshifts and stellar massesMucesh, S. et al.
Fecha de publicación:
42021 -
Evolution of galaxy scaling relations in clusters at 0.5 < z < 1.5Aims: We present new gas kinematic observations with the OSIRIS instrument at the GTC for galaxies in the Cl1604 cluster system at z ∼ 0.9. These observations together with a collection of other cluster samples at different epochs analyzed by our group are used to study the evolution of the Tully-Fisher, velocity-size, and specific angular momentumPérez-Martínez, J. M. et al.
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22021 -
Dark Energy Survey Year 3 results: Optimizing the lens sample in a combined galaxy clustering and galaxy-galaxy lensing analysisWe investigate potential gains in cosmological constraints from the combination of galaxy clustering and galaxy-galaxy lensing by optimizing the lens galaxy sample selection using information from Dark Energy Survey (DES) Year 3 data and assuming the DES Year 1 METACALIBRATION sample for the sources. We explore easily reproducible selections basedPorredon, A. et al.
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22021 -
Shadows in the Dark: Low-surface-brightness Galaxies Discovered in the Dark Energy SurveyWe present a catalog of 23,790 extended low-surface-brightness galaxies (LSBGs) identified in $\sim 5000\,{\deg }^{2}$ from the first three years of imaging data from the Dark Energy Survey (DES). Based on a single-component Sérsic model fit, we define extended LSBGs as galaxies with g-band effective radii ${R}_{\mathrm{eff}}(g)\gt 2\buildrel{Tanoglidis, D. et al.
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The effect of environment on Type Ia supernovae in the Dark Energy Survey three-year cosmological sampleAnalyses of Type Ia supernovae (SNe Ia) have found puzzling correlations between their standardized luminosities and host galaxy properties: SNe Ia in high-mass, passive hosts appear brighter than those in lower mass, star-forming hosts. We examine the host galaxies of SNe Ia in the Dark Energy Survey 3-yr spectroscopically confirmed cosmologicalKelsey, L. et al.
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32021 -
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.
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12021