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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Kinematics of Extremely Metal-poor Galaxies: Evidence for Stellar FeedbackThe extremely metal-poor (XMP) galaxies analyzed in a previous paper have large star-forming regions with a metallicity lower than the rest of the galaxy. Such a chemical inhomogeneity reveals the external origin of the metal-poor gas fueling star formation, possibly indicating accretion from the cosmic web. This paper studies the kinematicOlmo-García, A. et al.
Fecha de publicación:
12017 -
A millisecond pulsar candidate in a 21-h orbit: 3FGL J0212.1+5320We present the discovery of a variable optical counterpart to the unidentified gamma-ray source 3FGL J0212.1+5320 and argue that this is a new compact binary millisecond pulsar (MSP) candidate. We show 3FGL J0212.1+5320 hosts a semidetached binary with a 0.869 55 ± 0.000 15 d orbital period and an F6-type companion star at an estimated distance ofLinares, M. et al.
Fecha de publicación:
32017 -
Constraining the Epoch of Reionization from the Observed Properties of the High-z UniverseWe combine observational data on a dozen independent cosmic properties at high-z with the information on reionization drawn from the spectra of distant luminous sources and the cosmic microwave background (CMB) to constrain the interconnected evolution of galaxies and the intergalactic medium since the dark ages. The only acceptable solutions areSalvador-Solé, E. et al.
Fecha de publicación:
12017 -
Supernovae and Their Expanding Blast Waves during the Early Evolution of Galactic Globular ClustersOur arguments deal with the early evolution of Galactic globular clusters and show why only a few of the supernovae (SNe) products were retained within globular clusters and only in the most massive cases (M ≥ 106 M⊙), while less massive clusters were not contaminated at all by SNe. Here, we show that SN blast waves evolving in a steep densityTenorio-Tagle, G. et al.
Fecha de publicación:
112015 -
SHARDS: A Global View of the Star Formation Activity at z ~ 0.84 and z ~ 1.23In this paper, we present a comprehensive analysis of star-forming galaxies (SFGs) at intermediate redshifts (z ∼ 1). We combine the ultra-deep optical spectro-photometric data from the Survey for High-z Absorption Red and Dead Sources (SHARDS) with deep UV-to-FIR observations in the GOODS-N field. Exploiting two of the 25 SHARDS medium-bandCava, A. et al.
Fecha de publicación:
102015 -
A deep look at the nuclear region of UGC 5101 through high angular resolution mid-IR data with GTC/CanariCamWe present an analysis of the nuclear infrared (IR, 1.6-18 μm) emission of the ultraluminous IR galaxy UGC 5101 to derive the properties of its active galactic nucleus (AGN) and its obscuring material. We use new mid-IR high angular resolution (0.3-0.5 arcsec) imaging using the Si-2 filter (λC = 8.7 μm) and 7.5-13 μm spectroscopy taken withMartínez-Paredes, M. et al.
Fecha de publicación:
122015 -
Localized Starbursts in Dwarf Galaxies Produced by the Impact of Low-metallicity Cosmic Gas CloudsModels of galaxy formation predict that gas accretion from the cosmic web is a primary driver of star formation over cosmic history. Except in very dense environments where galaxy mergers are also important, model galaxies feed from cold streams of gas from the web that penetrate their dark matter halos. Although these predictions are unambiguousSánchez Almeida, J. et al.
Fecha de publicación:
92015 -
Nuclear obscuration in LINERs. Clues from Spitzer/IRS spectra on the Compton thickness and the existence of the dusty torusContext. Most of the optically classified low-ionisation, narrow emission-line regions (LINERs) nuclei host an active galactic nucleus (AGN). However, how they fit into the unified model (UM) of AGN is still an open question. Aims: The aims of this work are to study at mid-infrared (mid-IR) (1) the Compton-thick nature of LINERs (i.e. hydrogenGonzález-Martín, O. et al.
Fecha de publicación:
62015 -
GLACE survey: OSIRIS/GTC tuneable filter Hα imaging of the rich galaxy cluster ZwCl 0024.0+1652 at z = 0.395. I. Survey presentation, TF data reduction techniques, and catalogueThe cores of clusters at 0 ≲ z ≲ 1 are dominated by quiescent early-type galaxies, whereas the field is dominated by star-forming late-type galaxies. Clusters grow through the accretion of galaxies and groups from the surrounding field, which implies that galaxy properties, notably the star formation ability, are altered as they fall into overdenseSánchez-Portal, M. et al.
Fecha de publicación:
62015 -
VIMOS integral field spectroscopy of blue compact galaxies. I. Morphological properties, diagnostic emission-line ratios, and kinematicsContext. Blue compact galaxies (BCG) are gas-rich, low-luminosity, low-metallicity systems that undergo a violent burst of star formation. These galaxies offer us a unique opportunity to investigate collective star formation and its effects on galaxy evolution in a relatively simple environment. Spatially resolved spectrophotometric studies of BCGsCairós, L. M. et al.
Fecha de publicación:
52015 -
Extremely Metal-poor Galaxies: The EnvironmentWe have analyzed bibliographical observational data and theoretical predictions, in order to probe the environment in which extremely metal-poor dwarf galaxies (XMPs) reside. We have assessed the H i component and its relation to the optical galaxy, the cosmic web type (voids, sheets, filaments and knots), the overdensity parameter and analyzed theFilho, M. E. et al.
Fecha de publicación:
42015 -
On the Use of the Index N2 to Derive the Metallicity in Metal-poor GalaxiesThe N2 index ([N II] λ6584/Hα) is used to determine emission line galaxy metallicities at all redshifts, including high redshift, where galaxies tend to be metal-poor. The initial aim of this work was to improve the calibrations used to infer oxygen abundance from N2 by employing updated low-metallicity galaxy databases. We compare N2 and theMorales-Luis, A. B. et al.
Fecha de publicación:
122014 -
A mid-infrared view of the inner parsecs of the Seyfert galaxy Mrk 1066 using CanariCam/GTCWe present mid-infrared (MIR) imaging and spectroscopic data of the Seyfert 2 galaxy Mrk 1066 obtained with CanariCam (CC) on the 10.4-m Gran Telescopio CANARIAS (GTC). The galaxy was observed in imaging mode with an angular resolution of 0.24 arcsec (54 pc) in the Si-2 filter (8.7 μm). The image reveals a series of star-forming knots within theRamos Almeida, C. et al.
Fecha de publicación:
122014 -
X-ray spectral variability of LINERs selected from the Palomar sampleContext. Variability is a general property of active galactic nuclei (AGN). The way in which these changes occur at X-rays is not yet clearly understood. In the particular case of low-ionization nuclear emission line region (LINER) nuclei, variations on the timescales from months to years have been found for some objects, but the main driver ofHernández-García, L. et al.
Fecha de publicación:
92014 -
Polarized Mid-infrared Synchrotron Emission in the Core of Cygnus AWe present high-angular (~0.''4) resolution mid-infrared (MIR) polarimetric observations in the 8.7 μm and 11.6 μm filters of Cygnus A using CanariCam on the 10.4 m Gran Telescopio CANARIAS. A highly polarized nucleus is observed with a degree of polarization of 11% ± 3% and 12% ± 3% and a position angle of polarization of 27° ± 8° and 35° ± 8° inLopez-Rodriguez, E. et al.
Fecha de publicación:
102014 -
Higher prevalence of X-ray selected AGN in intermediate-age galaxies up to z ˜ 1We analyse the stellar populations in the host galaxies of 53 X-ray selected optically dull active galactic nuclei (AGN) at 0.34 z 1.07 with ultradeep (mAB = 26.5, 3σ) optical medium-band (R ˜ 50) photometry from the Survey for High-z Absorption Red and Dead Sources (SHARDS). The spectral resolution of SHARDS allows us to consistently measure theHernán-Caballero, A. et al.
Fecha de publicación:
102014 -
Episodic star formation in a group of LAEs at z = 5.07We are undertaking a search for high-redshift low-luminosity Lyman Alpha sources in the SHARDS (Survey for High-z Absorption Red and Dead Sources) survey. Among the pre-selected Lyman Alpha sources two candidates were spotted, located 3.19 arcsec apart, and tentatively at the same redshift. Here, we report on the spectroscopic confirmation withRodríguez Espinosa, J. M. et al.
Fecha de publicación:
102014 -
Star formation sustained by gas accretionNumerical simulations predict that metal-poor gas accretion from the cosmic web fuels the formation of disk galaxies. This paper discusses how cosmic gas accretion controls star formation, and summarizes the physical properties expected for the cosmic gas accreted by galaxies. The paper also collects observational evidence for gas accretionSánchez Almeida, J. et al.
Fecha de publicación:
72014 -
Nuclear 11.3 μm PAH emission in local active galactic nucleiWe present Gran Telescopio CANARIAS CanariCam 8.7 μm imaging and 7.5-13 μm spectroscopy of six local systems known to host an active galactic nucleus (AGN) and have nuclear star formation. Our main goal is to investigate whether the molecules responsible for the 11.3 μm polycyclic aromatic hydrocarbon (PAH) feature are destroyed in the closeAlonso-Herrero, A. et al.
Fecha de publicación:
92014 -
Synapses of active galactic nuclei:. Comparing X-ray and optical classifications using artificial neural networksContext. Many classes of active galactic nuclei (AGN) have been defined entirely through optical wavelengths, while the X-ray spectra have been very useful to investigate their inner regions. However, optical and X-ray results show many discrepancies that have not been fully understood yet. Aims: The main purpose of the present paper is to studyGonzález-Martín, O. et al.
Fecha de publicación:
72014
