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).

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

    Publicaciones relacionadas

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      We present a study of the H II regions in the galaxy NGC 6754 from a two pointing mosaic comprising 197 637 individual spectra, using integral field spectroscopy recently acquired with the MUSE instrument during its Science Verification program. The data cover the entire galaxy out to ~2 effective radii (re), sampling its morphological structures

      Sánchez, S. F. et al.

      Fecha de publicación:

      1
      2015
      Número de citas
      39
    • Radial variations in the stellar initial mass function of early-type galaxies

      The hypothesis of a universal initial mass function (IMF) - motivated by observations in nearby stellar systems - has been recently challenged by the discovery of a systematic variation of the IMF with the central velocity dispersion, σ, of early-type galaxies (ETGs), towards an excess of low-mass stars in high-σ galaxies. This trend has been

      Martín-Navarro, I. et al.

      Fecha de publicación:

      2
      2015
      Número de citas
      164
    • Ionized gas kinematics of galaxies in the CALIFA survey. I. Velocity fields, kinematic parameters of the dominant component, and presence of kinematically distinct gaseous systems

      Context. Ionized gas kinematics provide important clues to the dynamical structure of galaxies and hold constraints to the processes driving their evolution. Aims: The motivation of this work is to provide an overall characterization of the kinematic behavior of the ionized gas of the galaxies included in the Calar Alto Legacy Integral field Area

      García-Lorenzo, B. et al.

      Fecha de publicación:

      1
      2015
      Número de citas
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    • Overview of the SDSS-IV MaNGA Survey: Mapping nearby Galaxies at Apache Point Observatory

      We present an overview of a new integral field spectroscopic survey called MaNGA (Mapping Nearby Galaxies at Apache Point Observatory), one of three core programs in the fourth-generation Sloan Digital Sky Survey (SDSS-IV) that began on 2014 July 1. MaNGA will investigate the internal kinematic structure and composition of gas and stars in an

      Bundy, K. et al.

      Fecha de publicación:

      1
      2015
      Número de citas
      1000
    • The Stellar Initial Mass Function at 0.9 < z < 1.5

      We explore the stellar initial mass function (IMF) of a sample of 49 massive quiescent galaxies (MQGs) at 0.9 < z < 1.5. We base our analysis on intermediate resolution spectro-photometric data in the GOODS-N field taken in the near-infrared and optical with the Hubble Space Telescope Wide Field Camera 3 G141 grism and the Survey for High-z

      Martín-Navarro, I. et al.

      Fecha de publicación:

      1
      2015
      Número de citas
      30
    • Dissecting galactic bulges in space and time - I. The importance of early formation scenarios versus secular evolution

      The details of bulge formation via collapse, mergers, secular processes or their interplay remain unresolved. To start answering this question and quantify the importance of distinct mechanisms, we mapped a sample of three galactic bulges using data from the integral field spectrograph WiFeS on the ANU's 2.3-m telescope in Siding Spring Observatory

      Seidel, M. K. et al.

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      1
      2015
      Número de citas
      29
    • A Tale of a Rich Cluster at z ~ 0.8 as Seen by the Star Formation Histories of its Early-type Galaxies

      We present a detailed stellar population analysis for a sample of 24 early-type galaxies (ETGs) belonging to the rich cluster RX J0152.7-1357 at z = 0.83. We have derived the age, metallicity, abundance pattern, and star formation history (SFH) for each galaxy individually to further characterize this intermediate-z reference cluster. We then study

      Ferré-Mateu, A. et al.

      Fecha de publicación:

      12
      2014
      Número de citas
      15
    • Stellar Kinematics and Structural Properties of Virgo Cluster Dwarf Early-type Galaxies from the SMAKCED Project. II. The Survey and a Systematic Analysis of Kinematic Anomalies and Asymmetries

      We present spatially resolved kinematics and global stellar populations and mass-to-light ratios for a sample of 39 dwarf early-type (dE) galaxies in the Virgo cluster studied as part of the SMAKCED stellar absorption-line spectroscopy and imaging survey. This sample is representative of the early-type population in the Virgo cluster in the

      Toloba, E. et al.

      Fecha de publicación:

      12
      2014
      Número de citas
      58
    • Nearby supernova host galaxies from the CALIFA Survey. I. Sample, data analysis, and correlation to star-forming regions

      We use optical integral field spectroscopy (IFS) of nearby supernova (SN) host galaxies (0.005 2.4 Gyr, respectively) than the massive SN Ia hosts (0.04%, 2.01%, and 97.95% in these intervals). We estimate that the low-mass galaxies produce ten times fewer SNe Ia and three times fewer CC SNe than the high-mass group. Therefore the ratio between the

      Galbany, L. et al.

      Fecha de publicación:

      12
      2014
      Número de citas
      102
    • SPIDER - X. Environmental effects in central and satellite early-type galaxies through the stellar fossil record

      A detailed analysis of how environment affects the star formation history of early-type galaxies (ETGs) is undertaken via high signal-to-noise ratio stacked spectra obtained from a sample of 20 977 ETGs (morphologically selected) from the Sloan Digital Sky Survey-based SPIDER survey. Two major parameters are considered for the study: the central

      La Barbera, F. et al.

      Fecha de publicación:

      12
      2014
      Número de citas
      41
    • The HST/ACS Coma Cluster Survey - X. Nuclear star clusters in low-mass early-type galaxies: scaling relations

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      den Brok, M. et al.

      Fecha de publicación:

      12
      2014
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    • A search for stellar tidal debris of defunct dwarf galaxies around globular clusters in the inner Galactic halo

      In the hierarchical formation scenario in which the outer halo of the Milky Way is the result of the continuous accretion of low-mass galaxies, a fraction of the Galactic globular cluster system might have originated in and been accreted with already extinct dwarf galaxies. In this context, we expect that the remnants of these progenitor galaxies

      Carballo-Bello, J. A. et al.

      Fecha de publicación:

      12
      2014
      Número de citas
      41
    • Stellar population gradients in galaxy discs from the CALIFA survey. The influence of bars

      While studies of gas-phase metallicity gradients in disc galaxies are common, very little has been done towards the acquisition of stellar abundance gradients in the same regions. We present here a comparative study of the stellar metallicity and age distributions in a sample of 62 nearly face-on, spiral galaxies with and without bars, using data

      Sánchez-Blázquez, P. et al.

      Fecha de publicación:

      10
      2014
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      157
    • Intracluster Light at the Frontier: A2744

      The ultra-deep multiwavelength Hubble Space Telescope Frontier Fields coverage of the Abell Cluster 2744 is used to derive the stellar population properties of its intracluster light (ICL). The restframe colors of the ICL of this intermediate redshift (z = 0.3064) massive cluster are bluer (g – r = 0.68 ± 0.04; i – J = 0.56 ± 0.01) than those found

      Montes, M. et al.

      Fecha de publicación:

      10
      2014
      Número de citas
      89
    • CALIFA: a diameter-selected sample for an integral field spectroscopy galaxy survey

      We describe and discuss the selection procedure and statistical properties of the galaxy sample used by the Calar Alto Legacy Integral Field Area (CALIFA) survey, a public legacy survey of 600 galaxies using integral field spectroscopy. The CALIFA "mother sample" was selected from the Sloan Digital Sky Survey (SDSS) DR7 photometric catalogue to

      Walcher, C. J. et al.

      Fecha de publicación:

      9
      2014
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      208
    • Constraining the thick disc formation scenario of the Milky Way

      Aims: More than 30 years after its discovery, the thick disc of the Milky Way is not fully explored. We examine the shape of the thick disc in order to gain insight into the process of its formation. Methods: The shape of the thick disc is studied in detail using photometric data at high and intermediate latitudes from SDSS and 2MASS surveys. We

      Robin, A. C. et al.

      Fecha de publicación:

      9
      2014
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    • The effect of the environment on the stellar mass-size relationship for present-day galaxies

      In order to study how the environment can influence the relationship between the stellar mass and effective radius for nearby galaxies (z < 0.12), we use a mass-complete sample extracted from the NYU-Value Added Galaxy Catalogue. This sample contains almost 232 000 objects with masses of up to 3 × 1011 M⊙. For every galaxy in our sample, we explore

      Cebrián, M. et al.

      Fecha de publicación:

      10
      2014
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    • Constraints on the merging channel of massive galaxies since z ˜ 1

      We probe the merging channel of massive galaxies over the z = 0.3-1.3 redshift window by studying close pairs in a sample of 238 galaxies with stellar mass ≳1011 M⊙, from the SHARDS (Survey for High-z Absorption Red and Dead Sources) survey. SHARDS provides medium-band photometry equivalent to low-resolution optical spectra (R ˜ 50), allowing us to

      Ferreras, I. et al.

      Fecha de publicación:

      10
      2014
      Número de citas
      56
    • The Mice at play in the CALIFA survey. A case study of a gas-rich major merger between first passage and coalescence

      We present optical integral field spectroscopy (IFS) observations of the Mice, a major merger between two massive (≳1011 M⊙) gas-rich spirals NGC 4676A and B, observed between first passage and final coalescence. The spectra provide stellar and gas kinematics, ionised gas properties, and stellar population diagnostics, over the full optical extent

      Wild, V. et al.

      Fecha de publicación:

      7
      2014
      Número de citas
      48
    • Kinematic alignment of non-interacting CALIFA galaxies. Quantifying the impact of bars on stellar and ionised gas velocity field orientations

      We present 80 stellar and ionised gas velocity maps from the Calar Alto Legacy Integral Field Area (CALIFA) survey in order to characterise the kinematic orientation of non-interacting galaxies. The study of galaxies in isolation is a key step towards understanding how fast-external processes, such as major mergers, affect kinematic properties in

      Barrera-Ballesteros, J. K. et al.

      Fecha de publicación:

      8
      2014
      Número de citas
      64

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