Año de inicio
1992
Unidad organizativa
Institución organizadora
Subvenciones relacionadas:
General
Descripción
El proyecto interno GEFE está enmarcado en el proyecto coordinado, ESTALLIDOS, financiado por el plan nacional desde el año 2001. El ultimo proyecto aprobado es ESTALLIDOS 6.0 (AYA2016- 79724-C4-2-P). En el proyecto GEFE trabajamos en base al caso científico del proyecto ESTALLIDOS 6.0.
Los estallidos de formación estelar (Starbursts o SB) son clave la evolución de las galaxias y en la historia de formación estelar (FE) del Universo, la producción de metales, y en los procesos de retroalimentación que acoplan las galaxias con la red cósmica. Nuestro proyecto tiene como meta el estudio completo de la física de las regiones masivas del universo local, con objeto de entender el funcionamiento de las galaxias más lejanas y de los SBs más extremos. Combinamos estudios observacionales (usando telescopios terrestres y espaciales) con nuestros modelos teóricos. Entre las instalaciones que usaremos destacan los nuevos instrumentos de GTC, EMIR y MEGARA, en los que el equipo investigador participa y EMIR y MEGARA que entrarán en funcionamiento durante el periodo que cubre este proyecto.
Hemos estructurado nuestra investigación de los próximos tres años alrededor de cinco objetivos:
1) La interacción entre la FS masiva y el medio interestelar.
2) El gas en la formación de las galaxias disco.
3) El papel del entorno en la FS masiva y la evolución de galaxias.
4) Formación estelar en el Universo temprano.
5) Participación en la construcción de nueva instrumentación y en su verificación científica.
Los resultados que esperamos son: i) mejorar la comprensión de la evolución química de las galaxias usando datos de IFUs y modelos bi-dimensionales, ii) entender el papel del gas molecular y los fotones energéticos de fondo, iii) desarrollar una técnica para hacer imagen del gas de la red cósmica que alimenta la formación estelar en galaxias, iv) caracterizar las propiedades químicas y dinámicas del gas que cae sobre las galaxias, v) descifrar las distintas formas en las que fecta a la formación estelar a lo largo de la vida del Universo, prestando especial atención al disparo de la FE en las galaxias con menos metales, vi) explicar como SB masivos evolucionan en modo de 'positive feedback', para entender los SB extremos en el Universo primitivo, vii) estudiar la FS en galaxias Ly-alpha y Ly-break, viii) buscar candidatos a ser estrellas de población III en galaxias extremadamente pobres en metales, locales y a alto 'redshift', ix) desarrollar las técnicas que permitan un uso eficiente de EMIR y MEGARA. Lideraremos casos científicos en los que se usan estos instrumentos, tanto durante la fase de verificación como en su explotación posterior.
Miembros
Investigador principal
Casiana
Muñoz Tuñón
Personal del proyecto
Colaboradores
Nicola
Caon
José Alfonso
López Aguerri
Jairo
Méndez Abreu
Jorge Francisco
Sánchez Almeida
Antonia
Varela Pérez
Dr.
Nieves D. Castro Rodriguez
Dr.
Cecilia Fariña
Dr.
Daniel Reverte Paya
Claudio
Dalla Vecchia
Artemio
Herrero Davo
Dr.
Ricardo Amorin Barbieri
Dr.
Irene Cruz-González
Dr.
Erika Benitez
Dr.
Omaira González Martín
Dr.
Rafael Guzmán Llorente
Dr.
David Sobral
Dr.
Eduard Salvador Solé
Dr.
Miguel Mas Hesse
Dr.
Jesus Gallego Maestro
Dr.
Guillermo Tenorio Tagle
Dr.
Sergio Martinez
Dr.
Pablo Perez Gonzalez
Dr.
Bruce Elmegreen
Dr.
Debra Elmegreen
Resultados
- Se ha descubierto la anticorrelación entre la tasa de formación estelar y la metalicidad del gas en discos de galaxias.
- Descubrimiento una galaxia de baja masa y alta metalicidad, que confirma la estocaticidad de la red cósmica alimentando la formación estelar.
- El polvo producido en las supernovas puede sobrevivir. Los resultados de las simulaciones podrian ser importantes para el universo primitivo.
- El survey SHARDs con sus filtros estrechos permite por primera vez identificar la muestra de galaxias emisoras en Lyman alfa y galaxias con continuo de lyman (lyman break). Se podra estudiar la evolucion entre clases.
- Se identifica un posible AGN binario en la galaxia Mrk 622
Actividad científica
Publicaciones relacionadas
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Numerical simulations of dark matter haloes produce polytropic central cores when reaching thermodynamic equilibriumSelf-gravitating astronomical objects often show a central plateau in the density profile (core) whose physical origin is hotly debated. Cores are theoretically expected in N-body systems of maximum entropy, however, they are not present in the canonical N-body numerical simulations of cold dark matter (CDM). Our work shows that despite thisSánchez Almeida, Jorge et al.
Fecha de publicación:
62021 -
Extreme emission-line galaxies in SDSS - I. Empirical and model-based calibrations of chemical abundancesLocal star-forming galaxies show properties that are thought to differ from galaxies in the early Universe. Among them, the ionizing stellar populations and the gas geometry make the recipes designed to derive chemical abundances from nebular emission lines to differ from those calibrated in the Local Universe. A sample of 1969 extreme emissionPérez-Montero, E. et al.
Fecha de publicación:
62021 -
Is the Bremer Deep Field reionized, at z ∼ 7?We show herein that the population of star-forming galaxies in the Bremer Deep Field (BDF) has enough ionizing power to form two large ionized bubbles that could be in the process of merging into a large one with a volume of 14 000 cMpc 3. The sources identified in the BDF have been completed with a set of expected low-luminosity sources at z ∼ 7Rodríguez Espinosa, J. M. et al.
Fecha de publicación:
52021 -
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.
Fecha de publicación:
42021 -
Evidence for the Accretion of Gas in Star-forming Galaxies: High N/O Abundances in Regions of Anomalously Low MetallicityWhile all models for the evolution of galaxies require the accretion of gas to sustain their growth via on-going star formation, it has proven difficult to directly detect this inflowing material. In this paper we use data of nearby star-forming galaxies in the SDSS IV Mapping Nearby Galaxies at Apache Point Observatory survey to search forLuo, Yuanze et al.
Fecha de publicación:
22021 -
Lucky spectroscopy, an equivalent technique to lucky imaging. II. Spatially resolved intermediate-resolution blue-violet spectroscopy of 19 close massive binaries using the William Herschel TelescopeContext. Many massive stars have nearby companions. These hamper a characterization of massive stars through spectroscopy. Aims: We continue to obtain spatially resolved spectroscopy of close massive visual binaries to derive their spectral types. Methods: We used the lucky spectroscopy technique to obtain a large number of short long-slitMaíz Apellániz, J. et al.
Fecha de publicación:
22021 -
Three generations of stars: a possible case of triggered star formationEvidence for triggered star formation linking three generations of stars is difficult to assemble, as it requires convincingly associating evolved massive stars with H II regions that, in turn, would need to present signs of active star formation. We present observational evidence for triggered star formation relating three generations of stars inAreal, M. B. et al.
Fecha de publicación:
72020 -
Galactic extinction laws - II. Hidden in plain sight, a new interstellar absorption band at 7700 Å broader than any known DIBWe have detected a broad interstellar absorption band centred close to 7700 Å and with a full width at half-maximum (FWHM) of 176.6 ± 3.9 Å. This is the first such absorption band detected in the optical range and is significantly wider than the numerous diffuse interstellar bands (DIBs). It remained undiscovered until now because it is partiallyMaíz Apellániz, J. et al.
Fecha de publicación:
22021 -
Early science with the LMT: molecular torus in UGC 5101As part of the Early Science Large Millimeter Telescope projects, we report the detection of nine double-peaked molecular lines, produced by a rotating molecular torus, in the ultraluminous infrared galaxies (ULIRG) - Compton-thick active galactic nuclei (AGN) galaxy UGC 5101. The double-peaked lines we report correspond to molecular transitions ofCruz-González, I. et al.
Fecha de publicación:
92020 -
Local and Global Gas Metallicity versus Stellar Age Relation in MaNGA GalaxiesThe search for new global scaling relations linking the physical properties of galaxies has a fundamental interest. Furthermore, their recovery from spatially resolved relations has been in the spotlight of integral field spectroscopy (IFS). In this study, we investigate the existence of global and local relations between stellar age (Age ⋆) andSánchez-Menguiano, Laura et al.
Fecha de publicación:
112020 -
The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxiesCold dark matter (CDM) simulations predict a central cusp in the mass distribution of galaxies. This prediction is in stark contrast with observations of dwarf galaxies that show a central plateau or "core" in their density distribution. The proposed solutions to this core-cusp problem can be classified into two types. One invokes feedbackSánchez Almeida, Jorge et al.
Fecha de publicación:
102020 -
Studying star-forming processes at core and clump scales: the case of the young stellar object G29.862-0.0044Aims: To advance our knowledge of star formation, in addition to statistical studies and large surveys of young stellar objects (YSOs), it is important to carry out detailed studies towards particular objects. Given that massive molecular clumps fragment into cores where star formation takes place, these kinds of studies should be done on differentAreal, M. B. et al.
Fecha de publicación:
92020 -
Restoring the night sky darkness at Observatorio del Teide: First application of the model Illumina version 2The propagation of artificial light into real environments is complex. To perform its numerical modelling with accuracy, one must consider hyperspectral properties of the lighting devices and their geographic positions, the hyperspectral properties of the ground reflectance, the size and distribution of small-scale obstacles, the blocking effect ofAubé, Martin et al.
Fecha de publicación:
72020 -
Physical characterization of 2020 AV<SUB>2</SUB>, the first known asteroid orbiting inside Venus orbitThe first known asteroid with the orbit inside that of Venus is 2020 AV 2. This may be the largest member of a new population of small bodies with the aphelion smaller than 0.718 au, called Vatiras. The surface of 2020 AV 2 is being constantly modified by the high temperature, by the strong solar wind irradiation that characterizes the innermostPopescu, M. et al.
Fecha de publicación:
62020 -
Differences and similarities of stellar populations in LAEs and LBGs at z ∼ 3.4-6.8Lyman alpha emitters (LAEs) and Lyman break galaxies (LBGs) represent the most common groups of star-forming galaxies at high z, and the differences between their inherent stellar populations (SPs) are a key factor in understanding early galaxy formation and evolution. We have run a set of SP burst-like models for a sample of 1558 sources at 3.4 <Arrabal Haro, P. et al.
Fecha de publicación:
52020 -
Analysis of the galaxy size versus stellar mass relationThe scatter in the galaxy size versus stellar mass (M ⋆) relation gets largely reduced when, rather than the half-mass radius R e, the size at a fixed surface density is used. Here, we address why this happens. We show how a reduction is to be expected because any two galaxies with the same M ⋆ have at least one radius with identical surfaceSánchez Almeida, J.
Fecha de publicación:
42020 -
An ionized superbubble powered by a protocluster at z = 6.5We show herein that a proto-cluster of Ly α emitting galaxies, spectroscopically confirmed at redshift 6.5, produces a remarkable number of ionizing continuum photons. We start from the Ly α fluxes measured in the spectra of the sources detected spectroscopically. From these fluxes, we derive the ionizing emissivity of continuum photons of theRodríguez Espinosa, J. M. et al.
Fecha de publicación:
32020 -
Multiwavelength observations of the triple-peaked AGN Mrk 622A detailed multiwavelength study of the properties of the triple-peaked active galactic nucleus (AGN) Mrk 622 showing different aspects of the nuclear emission region is presented. Radio, near- and mid-infrared, optical, and X-ray data have been considered for the analysis. In the optical, the WHAN diagnostic diagrams show that the three nuclearBenítez, E. et al.
Fecha de publicación:
122019 -
A contribution of star-forming clumps and accreting satellites to the mass assembly of z ̃ 2 galaxiesWe investigate the contribution of clumps and satellites to the galaxy mass assembly. We analysed spatially resolved HubbleSpace Telescope observations (imaging and slitless spectroscopy) of 53 star-forming galaxies at z ̃ 1-3. We created continuum and emission line maps and pinpointed residual `blobs' detected after subtracting the galaxy discZanella, A. et al.
Fecha de publicación:
102019 -
Exploring the Mid-infrared SEDs of Six AGN Dusty Torus Models. I. Synthetic SpectraAt distances from the active galaxy nucleus where the ambient temperature falls below ̃1500-1800 K, dust is able to survive. It is thus possible to have a large dusty structure present that surrounds the active galaxy nucleus. This is the first of two papers aiming at comparing six dusty torus models with available spectral energy distributionsGonzález-Martín, Omaira et al.
Fecha de publicación:
102019
