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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An Optical-Near-IR Study of a Triplet of Super Star Clusters in the Starburst Core of M82We present HST/STIS optical and Gemini/NIFS near-IR IFU spectroscopy and archival Hubble Space Telescope (HST) imaging of the triplet of super star clusters (A1, A2, and A3) in the core of the M82 starburst. Using model fits to the Space Telescope Imaging Spectrograph (STIS) spectra and the weakness of red supergiant CO absorption featuresWestmoquette, M. S. et al.
Fecha de publicación:
72014 -
A fast version of the k-means classification algorithm for astronomical applicationsContext. K-means is a clustering algorithm that has been used to classify large datasets in astronomical databases. It is an unsupervised method, able to cope very different types of problems. Aims: We check whether a variant of the algorithm called single pass k-means can be used as a fast alternative to the traditional k-means. Methods: TheOrdovás-Pascual, I. et al.
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52014 -
Investigating the sensitivity of observed spectral energy distributions to clumpy torus properties in Seyfert galaxiesWe present nuclear spectral energy distributions (SEDs) from 1 to 18 μm of a small sample of nearby, nearly face-on and undisturbed Seyfert galaxies without prominent nuclear dust lanes. These nuclear SEDs probe the central ˜35 pc of the galaxies, on average, and include photometric and spectroscopic infrared (IR) data. We use these SEDs, theRamos Almeida, C. et al.
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32014 -
Metallicity Inhomogeneities in Local Star-forming Galaxies as a Sign of Recent Metal-poor Gas AccretionWe measure the oxygen metallicity of the ionized gas along the major axis of seven dwarf star-forming galaxies. Two of them, SDSSJ1647+21 and SDSSJ2238+14, show sime0.5 dex metallicity decrements in inner regions with enhanced star formation activity. This behavior is similar to the metallicity drop observed in a number of local tadpole galaxies bySánchez Almeida, J. et al.
Fecha de publicación:
32014 -
Nuclear Star Formation Activity and Black Hole Accretion in Nearby Seyfert GalaxiesRecent theoretical and observational works indicate the presence of a correlation between the star-formation rate (SFR) and active galactic nucleus (AGN) luminosity (and, therefore, the black hole accretion rate, \dot{M}_BH) of Seyfert galaxies. This suggests a physical connection between the gas-forming stars on kpc scales and the gas on sub-pcPackham, C. et al.
Fecha de publicación:
12014 -
Uncovering the Deeply Embedded Active Galactic Nucleus Activity in the Nuclear Regions of the Interacting Galaxy Arp 299We present mid-infrared (MIR) 8-13 μm spectroscopy of the nuclear regions of the interacting galaxy Arp 299 (IC 694+NGC 3690) obtained with CanariCam (CC) on the 10.4 m Gran Telescopio Canarias (GTC). The high angular resolution (~0.''3-0.''6) of the data allows us to probe nuclear physical scales between 60 and 120 pc, which is a factor of 10Alonso-Herrero, A. et al.
Fecha de publicación:
122013 -
Dusty Supernovae Running the Thermodynamics of the Matter Reinserted within Young and Massive Super Stellar ClustersFollowing the observational and theoretical evidence that points at core-collapse supernovae (SNe) as major producers of dust, here we calculate the hydrodynamics of the matter reinserted within young and massive super stellar clusters under the assumption of gas and dust radiative cooling. The large SN rate expected in massive clusters allows forTenorio-Tagle, G. et al.
Fecha de publicación:
122013 -
The environments of luminous radio galaxies and type-2 quasarsWe present the results of a comparison between the environments of (1) a complete sample of 46 southern 2-Jy radio galaxies at intermediate redshifts (0.05 z 0.7), (2) a complete sample of 20 radio-quiet type-2 quasars (0.3 ≤ z ≤ 0.41), and (3) a control sample of 107 quiescent early-type galaxies at 0.2 ≤ z 0.7 in the Extended Groth Strip. TheRamos Almeida, C. et al.
Fecha de publicación:
122013 -
The Role of the Accretion Disk, Dust, and Jets in the IR Emission of Low-luminosity Active Galactic NucleiWe use recent high-resolution infrared (IR; 1-20 μm) photometry to examine the origin of the IR emission in low-luminosity active galactic nuclei (LLAGN). The data are compared with published model fits that describe the spectral energy distribution (SED) of LLAGN in terms of an advection-dominated accretion flow, truncated thin accretion disk, andMason, R. E. et al.
Fecha de publicación:
112013 -
Extremely metal-poor galaxies: The H I contentContext. Extremely metal-poor (XMP) galaxies are chemically, and possibly dynamically, primordial objects in the local Universe. Aims: Our objective is to characterize the H i content of the XMP galaxies as a class, using as a reference the list of 140 known local XMPs compiled by Morales-Luis et al. (2011). Methods: We have observed 29 XMPs, whichFilho, M. E. et al.
Fecha de publicación:
102013 -
The XMM-Newton Wide Angle Survey (XWAS)Aims: This programme is aimed at obtaining one of the largest X-ray selected samples of identified active galactic nuclei to date in order to characterise such a population at intermediate fluxes, where most of the Universe's accretion power originates. We present the XMM-Newton Wide Angle Survey (XWAS), a new catalogue of almost a thousand X-rayEsquej, P. et al.
Fecha de publicación:
92013 -
Massive Clumps in Local Galaxies: Comparisons with High-redshift ClumpsLocal UV-bright galaxies in the Kiso survey include clumpy systems with kiloparsec-size star complexes that resemble clumpy young galaxies in surveys at high redshift. We compare clump masses and underlying disks in several dozen galaxies from each of these surveys to the star complexes and disks of normal spirals. Photometry and spectroscopy forElmegreen, B. G. et al.
Fecha de publicación:
92013 -
X-ray spectral variability of seven LINER nuclei with XMM-Newton and Chandra dataContext. One of the most distinctive features in active galactic nuclei (AGN) is the variability of their emission. Variability has been discovered at X-ray, UV, and radio frequencies on timescales from hours to years. Among the AGN family and according to theoretical studies, low-ionization nuclear emission line region (LINER) nuclei would beHernández-García, L. et al.
Fecha de publicación:
82013 -
On the nature of the red, 2MASS-selected AGN in the local Universe I: an optical spectroscopic studyWe present optical spectra for a representative sample of 27 nearby (z 0.2) Two Micron All Sky Survey (2MASS)-selected active galactic nuclei (AGN) with red near-infrared colours (J - KS ≳ 2.0). The spectra were taken with the ISIS spectrograph on the William Herschel Telescope with the aim of determining the nature of the red 2MASS AGN, inRose, M. et al.
Fecha de publicación:
72013 -
A Virtual Observatory Census to Address Dwarfs Origins (AVOCADO). I. Science goals, sample selection, and analysis toolsContext. Even though they are by far the most abundant of all galaxy types, the detailed properties of dwarf galaxies are still only poorly characterised - especially because of the observational challenge that their intrinsic faintness and weak clustering properties represent. Aims: AVOCADO aims at establishing firm conclusions on the formationSánchez-Janssen, R. et al.
Fecha de publicación:
62013 -
The importance of warm, AGN-driven outflows in the nuclear regions of nearby ULIRGsWe present an optical spectroscopic study of a 90 per cent complete sample of nearby ULIRGs (z 0.175) with optical Seyfert nuclei, with the aim of investigating the nature of the near-nuclear (r ≲ 3.5 kpc) warm gas outflows. A high proportion (94 per cent) of our sample show disturbed emission line kinematics in the form of broad (FWHM > 500 km sRodríguez-Zaurín, J. et al.
Fecha de publicación:
62013 -
Kinematics of Arp 270: gas flows, nuclear activity and two regimes of star formationWe have observed the Arp 270 system (NGC 3395 and NGC 3396) in Hα emission using the Galaxy Hα Fabry-Perot spectrometer on the 4.2 m William Herschel Telescope (La Palma). In NGC 3396, which is edge-on to us, we detect gas inflow towards the centre, and also axially confined opposed outflows, characteristic of galactic superwinds, and we go on toZaragoza-Cardiel, J. et al.
Fecha de publicación:
62013 -
Dust in active galactic nuclei. Mid-infrared T-ReCS/Gemini spectra using the new RedCan pipelineContext. The unified model of active galactic nuclei (AGN) claims that the properties of AGN depend on the viewing angle of the observer with respect to a toroidal distribution of dust surrounding the nucleus. Both the mid-infrared (MIR) attenuation and continuum luminosity are expected to be related to dust associated with the torus. ThereforeGonzález-Martín, O. et al.
Fecha de publicación:
52013 -
Estimations of the magnetic field strength in the torus of IC 5063 using near-infrared polarimetryAn optically and geometrically thick torus obscures the central engine of active galactic nuclei (AGN) from some lines of sight. From a magnetohydrodynamical framework, the torus can be considered to be a particular region of clouds surrounding the central engine where the clouds are dusty and optically thick. In this framework, the magnetic fieldLopez-Rodriguez, E. et al.
Fecha de publicación:
52013 -
Local Tadpole Galaxies: Dynamics and MetallicityTadpole galaxies, with a bright peripheral clump on a faint tail, are morphological types unusual in the nearby universe but very common early on. Low mass local tadpoles were identified and studied photometrically in a previous work, which we complete here analyzing their chemical and dynamical properties. We measure Hα velocity curves of sevenElmegreen, D. M. et al.
Fecha de publicación:
42013
