Grupo de Estudios de Formación Estelar GEFE

    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.

    Investigador principal
    Personal del proyecto
    Colaboradores
    Dr.
    Nieves D. Castro Rodriguez
    Dr.
    Daniel Reverte Paya
    Dr.
    Ricardo Amorin Barbieri
    Dr.
    Rafael Guzmán Llorente
    Dr.
    Jesus Gallego Maestro
    Dr.
    Pablo Perez Gonzalez
    Dr.
    Bruce Elmegreen
    Dr.
    Debra Elmegreen
    1. Se ha descubierto la anticorrelación entre la tasa de formación estelar y la metalicidad del gas en discos de galaxias.
    2. Descubrimiento una galaxia de baja masa y alta metalicidad, que confirma la estocaticidad de la red cósmica alimentando la formación estelar.
    3. El polvo producido en las supernovas puede sobrevivir. Los resultados de las simulaciones podrian ser importantes para el universo primitivo.
    4. 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.
    5. Se identifica un posible AGN binario en la galaxia Mrk 622

    Publicaciones relacionadas

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      Castro, N. et al.

      Fecha de publicación:

      6
      2018
      Número de citas
      33
    • Towards an improvement in the spectral description of central stars of planetary nebulae

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      7
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    • Neutron-capture Elements in Planetary Nebulae: First Detections of Near-infrared [Te III] and [Br V] Emission Lines

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      Madonna, S. et al.

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      7
      2018
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      15
    • An unusual transient in the extremely metal-poor Galaxy SDSS J094332.35+332657.6 (Leoncino Dwarf)

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      Filho, M. E. et al.

      Fecha de publicación:

      8
      2018
      Número de citas
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    • A simultaneous search for high-z LAEs and LBGs in the SHARDS survey

      We have undertaken a comprehensive search for both Lyman alpha emitters (LAEs) and Lyman break galaxies (LBGs) in the Survey for High-z Absorption Red and Dead Sources (SHARDS) Survey of the Great Observatories Origins Deep Survey North field. SHARDS is a deep imaging survey, made with the 10.4 m Gran Telescopio Canarias, employing 25 medium band

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      Fecha de publicación:

      8
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      Número de citas
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    • The Origin of the Relation between Metallicity and Size in Star-forming Galaxies

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    • NOEMA Observations of a Molecular Cloud in the Low-metallicity Galaxy Kiso 5639

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      6
      2018
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      Fecha de publicación:

      7
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    • Machine learning in APOGEE. Unsupervised spectral classification with K-means

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      Garcia-Dias, R. et al.

      Fecha de publicación:

      5
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    • The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment

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      Fecha de publicación:

      4
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    • Local anticorrelation between star formation rate and gas-phase metallicity in disc galaxies

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      Fecha de publicación:

      6
      2018
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    • SHARDS Frontier Fields: Physical Properties of a Low-mass Lyα Emitter at z = 5.75

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      Hernán-Caballero, A. et al.

      Fecha de publicación:

      11
      2017
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    • Gas Accretion and Star Formation Rates

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      Sánchez Almeida, J.

      Fecha de publicación:

      1
      2017
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    • The molecular environment of the pillar-like features in the H ii region G46.5-0.2

      At the interface of H ii regions and molecular gas, peculiar structures appear, some of them with pillar-like shapes. Understanding their origin is important for characterizing triggered star formation and the impact of massive stars on the interstellar medium. In order to study the molecular environment and influence of radiation on two pillar

      Paron, S. et al.

      Fecha de publicación:

      10
      2017
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    • Gran Telescopio Canarias observations of an overdense region of Lyman α emitters at z = 6.5

      We present the results of our search near the end of the Reionization Epoch for faint galaxies. This has been done using very deep OSIRIS images obtained at the Gran Telescopio Canarias (GTC). Our observations focus around two close, massive Lyman α emitters (LAEs) at redshift 6.5, discovered in the SXDS field within a large-scale overdense region

      Chanchaiworawit, K. et al.

      Fecha de publicación:

      8
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    • A comparison between the soft X-ray and [O III] morphologies of active galactic nuclei

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      Gómez-Guijarro, Carlos et al.

      Fecha de publicación:

      8
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    • Hints on the Gradual Resizing of the Torus in AGNs through Decomposition of Spitzer/IRS Spectra

      Several authors have claimed that less luminous active galactic nuclei (AGNs) are not capable of sustaining a dusty torus structure. Thus, a gradual resizing of the torus is expected when the AGN luminosity decreases. Our aim is to examine mid-infrared observations of local AGNs of different luminosities for the gradual resizing and disappearance

      González-Martín, Omaira et al.

      Fecha de publicación:

      5
      2017
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      23
    • The Nearest Ultra Diffuse Galaxy: UGC 2162

      We describe the structural, stellar population and gas properties of the nearest ultra diffuse galaxy discovered so far: UGC 2162 (z = 0.00392 {R}e,g=1.7(+/- 0.2) kpc; {μ }g(0) = 24.4 ± 0.1 mag arcsec‑2 g-i = 0.33 ± 0.02). This galaxy, located at a distance of 12.3(±1.7) Mpc, is a member of the M77 group. UGC 2162 has a stellar mass of ∼ 2{(}-1+2)

      Trujillo, I. et al.

      Fecha de publicación:

      2
      2017
      Número de citas
      78
    • On the Dearth of Ultra-faint Extremely Metal-poor Galaxies

      Local extremely metal-poor galaxies (XMPs) are of particular astrophysical interest since they allow us to look into physical processes characteristic of the early universe, from the assembly of galaxy disks to the formation of stars in conditions of low metallicity. Given the luminosity–metallicity relationship, all galaxies fainter than M r ≃ ‑13

      Sánchez Almeida, J. et al.

      Fecha de publicación:

      2
      2017
      Número de citas
      17
    • Star formation in AGNs at the hundred parsec scale using MIR high-resolution images

      It has been well established in the past decades that the central black hole masses of galaxies correlate with dynamical properties of their harbouring bulges. This notion begs the question of whether there are causal connections between the active galactic nucleus (AGN) and its immediate vicinity in the host galaxy. In this paper, we analyse the

      Ruschel-Dutra, D. et al.

      Fecha de publicación:

      4
      2017
      Número de citas
      16

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