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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On the Stellar Content of the Starburst Galaxy IC10We investigate the stellar content of the starburst dwarf galaxy IC10 using accurate and deep optical data collected with the Advanced Camera for Surveys and with the Wide Field Planetary Camera 2 onboard the Hubble Space Telescope. The comparison between theory and observations indicates a clear change in age distribution when moving from theSanna, N. et al.
Fecha de publicación:
72009 -
On the origin of the compact H ii regions around massive stellar clustersThe existence of compact H ii regions around massive stellar clusters with ages exceeding several Myr challenges our understanding of the physical processes occurring inside such clusters, and their impact on the interstellar medium of the host galaxy. Here, we summarize our recent results dealing with the hydrodynamics of matter ejected by massiveSilich, Sergiy et al.
Fecha de publicación:
122009 -
On the Heating Efficiency Derived from Observations of Young Super Star Clusters in M82Here, we discuss the mechanical feedback that massive stellar clusters provide to the interstellar medium of their host galaxy. We apply an analytic theory developed in a previous study for M82-A1 to a sample of 10 clusters located in the central zone of the starburst galaxy M82, all surrounded by compact and dense H II regions. We claim that theSilich, Sergiy et al.
Fecha de publicación:
82009 -
On the Extreme Positive Star Formation Feedback Condition in Scuba SourcesWe present a detailed study of the hydrodynamics of the matter reinserted by massive stars via stellar winds and supernovae explosions in young assembling galaxies. We show that the interplay between the thermalization of the kinetic energy provided by massive stars, radiative cooling of the thermalized plasma, and the gravitational pull of theSilich, Sergiy et al.
Fecha de publicación:
32010 -
On the Compact H II Galaxy UM 408 as Seen by GMOS-IFU: Physical ConditionsWe present Integral Field Unit GMOS-IFU data of the compact H II galaxy UM 408, obtained at the Gemini South telescope, in order to derive the spatial distribution of emission lines and line ratios, kinematics, plasma parameters, and oxygen abundances as well the integrated properties over an area of 3''×4farcs4 equivalent with ~750 pc × 1100 pcLagos, Patricio et al.
Fecha de publicación:
62009 -
Local Tadpole GalaxiesTadpole galaxies have a giant star-forming region at the end of an elongated intensity distribution. Here we use Sloan Digital Sky Survey data to determine the ages, masses, and surface densities of the heads and tails in 14 local tadpoles selected from the Kiso and Michigan surveys of UV-bright galaxies, and we compare them to tadpoles previouslyElmegreen, Debra Meloy et al.
Fecha de publicación:
52012 -
Evolution of Super Star Cluster Winds with Strong CoolingWe study the evolution of super star cluster winds driven by stellar winds and supernova explosions. Time-dependent rates at which mass and energy are deposited into the cluster volume, as well as the time-dependent chemical composition of the re-inserted gas, are obtained from the population synthesis code Starburst99. These results are used asWünsch, Richard et al.
Fecha de publicación:
102011 -
A study of the interplay between ionized gas and star clusters in the central region of NGC 5253 with 2D spectroscopyContext. Starbursts are one of the main contributors to the chemical enrichment of the interstellar medium. However, mechanisms governing the interaction between the recent star formation and the surrounding gas are not fully understood. Because of their a priori simplicity, the subgroup of H II galaxies constitute an ideal sample to study theseMonreal-Ibero, A. et al.
Fecha de publicación:
72010 -
Structure and Dynamics of the Central Regions of Disk GalaxiesNot AvailableMéndez-Abreu, Jairo
Fecha de publicación:
62009 -
Structure and dynamics of galaxies with a low surface-brightness disc - II. Stellar populations of bulgesWe present the radial profiles of the Hβ, Mg and Fe line-strength indices for a sample of eight spiral galaxies with a low-surface-brightness stellar disc and a bulge. The correlations between the central values of the line-strength indices and velocity dispersion are consistent with those known for early-type galaxies and bulges of high-surfaceMorelli, L. et al.
Fecha de publicación:
62012 -
Polar bulges and polar nuclear discs: the case of NGC 4698The early-type spiral NGC 4698 is known to host a nuclear disc of gas and stars which is rotating perpendicularly with respect to the galaxy main disc. In addition, the bulge and main disc are characterized by a remarkable geometrical decoupling. Indeed, they appear elongated orthogonally to each other. In this work, the complex structure of theCorsini, E. M. et al.
Fecha de publicación:
62012 -
The ACS LCID Project. VI. The Star Formation History of The Tucana dSph and The Relative Ages of the Isolated dSph GalaxiesWe present a detailed study of the star formation history (SFH) of the Tucana dwarf spheroidal galaxy. High-quality, deep HST/ACS data, collected in the framework of the LCID project, allowed us to obtain the deepest color-magnitude diagram to date, reaching the old main-sequence turnoff (F814 ~ 29) with good photometric accuracy. Our analysisMonelli, M. et al.
Fecha de publicación:
102010 -
The ACS LCID Project. III. The Star Formation History of the Cetus dSph Galaxy: A Post-reionization FossilWe use deep HST/ACS observations to calculate the star formation history (SFH) of the Cetus dwarf spheroidal (dSph) galaxy. Our photometry reaches below the oldest main-sequence turnoffs, which allows us to estimate the age and duration of the main episode of star formation in Cetus. This is well approximated by a single episode that peaked roughlyMonelli, M. et al.
Fecha de publicación:
92010 -
The ACS LCID Project. II. Faint Variable Stars in the Isolated Dwarf Irregular Galaxy IC 1613We present the results of a new search for variable stars in the Local Group (LG) isolated dwarf galaxy IC 1613, based on 24 orbits of F475W and F814W photometry from the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope. We detected 259 candidate variables in this field, of which only 13 (all of them bright Cepheids) wereBernard, E. J. et al.
Fecha de publicación:
42010 -
The ACS LCID Project. I. Short-Period Variables in the Isolated Dwarf Spheroidal Galaxies Cetus and TucanaWe present the first study of the variable star populations in the isolated dwarf spheroidal galaxies (dSphs) Cetus and Tucana. Based on Hubble Space Telescope images obtained with the Advanced Camera for Surveys in the F475W and F814W bands, we identified 180 and 371 variables in Cetus and Tucana, respectively. The vast majority are RR Lyrae starsBernard, Edouard J. et al.
Fecha de publicación:
72009 -
Characterization of Active Galactic Nuclei and Their Hosts in the Extended Groth Strip: A Multiwavelength AnalysisWe have employed a reliable technique of classification of active galactic nuclei (AGNs) based on the fit of well sampled spectral energy distributions (SEDs) with a complete set of AGN and starburst galaxy templates. We have compiled UV, optical, and IR data for a sample of 116 AGNs originally selected for their X-ray and mid-IR emissions (96 withRamos Almeida, C. et al.
Fecha de publicación:
12009 -
Astronomical site selection: on the use of satellite data for aerosol content monitoringThe main goal of this work is to analyse new approaches to the study of the properties of astronomical sites. In particular, satellite data measuring aerosols have recently been proposed as a useful technique for site characterization and searching for new sites to host future very large telescopes. Nevertheless, these data need to be criticallyVarela, A. M. et al.
Fecha de publicación:
122008 -
New Light in Star-Forming Dwarf Galaxies: The PMAS Integral Field View of the Blue Compact Dwarf Galaxy Mrk 409We present an integral field spectroscopic study of the central 2 × 2 kpc2 of the blue compact dwarf galaxy Mrk 409, observed with the Potsdam MultiAperture Spectrophotometer (PMAS). This study focuses on the morphology, two-dimensional chemical abundance pattern, excitation properties, and kinematics of the ionized interstellar medium in theCairós, Luz M. et al.
Fecha de publicación:
122009 -
Mapping the starburst in blue compact dwarf galaxies. PMAS integral field spectroscopy of Mrk 1418Aims: By means of optical integral field spectroscopy observations, we aim to differentiate and characterize the starburst component in the blue compact dwarf (BCD) galaxy Mrk 1418. In particular we propose to study the stellar and ionized gas morphology, to investigate the ionization mechanism(s) acting in the interstellar medium, and to deriveCairós, L. M. et al.
Fecha de publicación:
122009 -
Mapping the properties of blue compact dwarf galaxies: integral field spectroscopy with PMASContext. Blue compact dwarf (BCD) galaxies are low-luminosity, low-metal content dwarf systems undergoing violent bursts of star formation. They present a unique opportunity to probe galaxy formation and evolution and to investigate the process of star formation in a relatively simple scenario. Spectrophotometric studies of BCDs are essential toCairós, L. M. et al.
Fecha de publicación:
92010
