Huellas de la Formación de las Galaxias: Poblaciones estelares, Dinámica y Morfología

    General
    Descripción

    Bienvenida a la página web del grupo de investigación Traces of Galaxy Formation.

    Somos un grupo de investigación amplio, diverso y muy activo cuyo objetivo principal es entender la formación de galaxias en el Universo de una manera lo más completa posible. Con el estudio detellado de las poblaciones estelares como bandera, estamos constantemente buscando y desarrollando nuevas herramientas e ideas que nos permitan entender cómo las galaxias han llegado a convertirse en lo que hoy observamos.

    Una historia de formación compleja, como la que se espera describa la evolución de las galaxias, necesita de un acercamiento multidisciplinar para ser entendida. Nuestro grupo en el IAC está compuesto por personal investigador de gran experiencia en simulaciones cosmológicas, estudios dinámicos, análisis de poblaciones estelares y  caracterizaciones morfológicas de galaxias tanto locales como a alto corrimiento al rojo. Combinamos distintas alternativas (e.g. observaciones y teoría o procesos de evolución secular y cosmológica) para poder alcanzar en los próximos años una visión consistente de los mecanismos físicos que regulan la formación de las galaxias.

    Dentro de este esquema general, estamos principalmente centrados en el estudio de tres líneas centrales:

    1. Modelos de síntesis de poblaciones estelares
      • Desarrollo de modelos de poblaciones estelares
      • Métodos de análisis para el estudio de poblaciones estelares
      • Universalidad de la función inicial de masa (IMF)
       
    2. Evolución cósmica de galaxias
      • Evolución de galaxias masivas
      • Poblaciones estelares en distintos entornos
      • Ciencia a bajo brillo superficial
      • Simulaciones númericas y aprendizaje automático
       
    3. Procesos evolutivos en galaxias cercanas
      • Agujeros negros como moduladores de la formación estelar
      • Cartogrtafiados locales
      • Cinemática estelar y modelos dinámicos

    Si quieres ponerte en contacto o trabajar con el grupo, por favor, envía un correo al investigador principal (Ignacio Martín-Navarro ignacio.martin [at] iac.es (ignacio[dot]martin[at]iac[dot]es)).

    Esta es una muestra de algunos de nuestros resultados destacados más recientes:

    Publicaciones relacionadas

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      We determine abundance ratios of 37 dwarf ellipticals (dEs) in the nearby Virgo cluster. This sample is representative of the early-type population of galaxies in the absolute magnitude range -19.0 < Mr < -16.0. We analyse their absorption line-strength indices by means of index-index diagrams and scaling relations and use the stellar population

      Şen, Ş. et al.

      Fecha de publicación:

      4
      2018
      Número de citas
      10
    • The EDGE-CALIFA survey: validating stellar dynamical mass models with CO kinematics

      Deriving circular velocities of galaxies from stellar kinematics can provide an estimate of their total dynamical mass, provided a contribution from the velocity dispersion of the stars is taken into account. Molecular gas (e.g. CO), on the other hand, is a dynamically cold tracer and hence acts as an independent circular velocity estimate without

      Leung, G. Y. C. et al.

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      2018
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    • The hELENa project - II. Abundance distribution trends of early-type galaxies: from dwarfs to giants

      In this second paper of The role of Environment in shaping Low-mass Early-type Nearby galaxies (hELENa) series we study [Mg/Fe] abundance distribution trends of early-type galaxies (ETGs) observed with the Spectrographic Areal Unit for Research on Optical Nebulae integral field unit, spanning a wide range in mass and local environment densities: 20

      Sybilska, A. et al.

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      6
      2018
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    • A single population of red globular clusters around the massive compact galaxy NGC 1277

      Massive galaxies are thought to form in two phases: an initial collapse of gas and giant burst of central star formation, followed by the later accretion of material that builds up their stellar and dark-matter haloes. The systems of globular clusters within such galaxies are believed to form in a similar manner. The initial central burst forms

      Beasley, M. A. et al.

      Fecha de publicación:

      3
      2018
      Número de citas
      58
    • The stellar orbit distribution in present-day galaxies inferred from the CALIFA survey

      Galaxy formation entails the hierarchical assembly of mass, along with the condensation of baryons and the ensuing, self-regulating star formation1,2. The stars form a collisionless system whose orbit distribution retains dynamical memory that can constrain a galaxy's formation history3. The orbits dominated by ordered rotation, with near-maximum

      Zhu, L. et al.

      Fecha de publicación:

      3
      2018
      Número de citas
      67
    • Timing the formation and assembly of early-type galaxies via spatially resolved stellar populations analysis

      To investigate star formation and assembly processes of massive galaxies, we present here a spatially resolved stellar population analysis of a sample of 45 elliptical galaxies (Es) selected from the Calar Alto Legacy Integral Field Area survey. We find rather flat age and [Mg/Fe] radial gradients, weakly dependent on the effective velocity

      Martín-Navarro, I. et al.

      Fecha de publicación:

      4
      2018
      Número de citas
      63
    • The shape of oxygen abundance profiles explored with MUSE: evidence for widespread deviations from single gradients

      We characterised the oxygen abundance radial distribution of a sample of 102 spiral galaxies observed with VLT/MUSE using the O3N2 calibrator. The high spatial resolution of the data allowed us to detect 14345 H II regions with the same image quality as with photometric data, avoiding any dilution effect. We developed a new methodology to

      Sánchez-Menguiano, L. et al.

      Fecha de publicación:

      2
      2018
      Número de citas
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    • Revisiting the stellar velocity ellipsoid-Hubble-type relation: observations versus simulations

      The stellar velocity ellipsoid (SVE) in galaxies can provide important information on the processes that participate in the dynamical heating of their disc components (e.g. giant molecular clouds, mergers, spiral density waves, and bars). Earlier findings suggested a strong relation between the shape of the disc SVE and Hubble type, with later-type

      Pinna, F. et al.

      Fecha de publicación:

      4
      2018
      Número de citas
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    • Black-hole-regulated star formation in massive galaxies

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      Martín-Navarro, I. et al.

      Fecha de publicación:

      1
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    • The Bulge Metallicity Distribution from the APOGEE Survey

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      García Pérez, A. E. et al.

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      1
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    • Orbital decomposition of CALIFA spiral galaxies

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      Fecha de publicación:

      1
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    • NIHAO - XIV. Reproducing the observed diversity of dwarf galaxy rotation curve shapes in ΛCDM

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      Santos-Santos, Isabel M. et al.

      Fecha de publicación:

      2
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    • Intracluster light at the Frontier - II. The Frontier Fields Clusters

      Multiwavelength deep observations are a key tool to understand the origin of the diffuse light in clusters of galaxies: the intracluster light (ICL). For this reason, we take advantage of the Hubble Frontier Fields (HFF) survey to investigate the properties of the stellar populations of the ICL of its six massive intermediate redshift (0.3 < z < 0

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      Fecha de publicación:

      2
      2018
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    • Morpho-kinematic properties of field S0 bulges in the CALIFA survey

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      Méndez-Abreu, J. et al.

      Fecha de publicación:

      2
      2018
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    • The Fornax Deep Survey with VST. III. Low surface brightness dwarfs and ultra diffuse galaxies in the center of the Fornax cluster

      Context. Studies of low surface brightness (LSB) galaxies in nearby clusters have revealed a sub-population of extremely diffuse galaxies with central surface brightness of μ0,g' > 24 mag arcsec-2, total luminosity Mg' fainter than -16 mag and effective radius between 1.5 kpc 23 mag arcsec-2. We classified the objects based on their appearance into

      Venhola, A. et al.

      Fecha de publicación:

      12
      2017
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    • The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory

      The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in 2014 July. It pursues three core programs: the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2), Mapping Nearby Galaxies at APO (MaNGA), and the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). As well as its core program, eBOSS

      Albareti, F. D. et al.

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    • Young LMC clusters: the role of red supergiants and multiple stellar populations in their integrated light and CMDs

      The optical integrated spectra of three Large Magellanic Cloud young stellar clusters (NGC 1984, NGC 1994 and NGC 2011) exhibit concave continua and prominent molecular bands which deviate significantly from the predictions of single stellar population (SSP) models. In order to understand the appearance of these spectra, we create a set of young

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      11
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    • CALIFA reveals prolate rotation in massive early-type galaxies: A polar galaxy merger origin?

      We present new evidence for eight early-type galaxies (ETGs) from the CALIFA Survey that show clear rotation around their major photometric axis ("prolate rotation"). These are LSBCF560-04, NGC 0647, NGC 0810, NGC 2484, NGC 4874, NGC 5216, NGC 6173, and NGC 6338. Including NGC 5485, a known case of an ETG with stellar prolate rotation, as well as

      Tsatsi, A. et al.

      Fecha de publicación:

      10
      2017
      Número de citas
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    • Young, metal-enriched cores in early-type dwarf galaxies in the Virgo cluster based on colour gradients

      Early-type dwarf galaxies are not simply featureless, old objects, but were found to be much more diverse, hosting substructures and a variety of stellar population properties. To explore the stellar content of faint early-type galaxies, and to investigate in particular those with recent central star formation, we study colours and colour gradients

      Urich, L. et al.

      Fecha de publicación:

      10
      2017
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      22
    • Star Formation in the Local Universe from the CALIFA Sample. II. Activation and Quenching Mechanisms in Bulges, Bars, and Disks

      We estimate the current extinction-corrected Hα star formation rate (SFR) of the different morphological components that shape galaxies (bulges, bars, and disks). We use a multicomponent photometric decomposition based on Sloan Digital Sky Survey imaging to Calar Alto Legacy Integral Field Area Integral Field Spectroscopy (IFS) datacubes for a

      Catalán-Torrecilla, C. et al.

      Fecha de publicación:

      10
      2017
      Número de citas
      54

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