Las Galaxias Espirales: Evolución y Consecuencias

    General
    Descripción

    Nuestro grupo pequeño esta bien conocido y respetado internacionalmente por nuestro trabajo inovativo e importante en varios aspectos de la estructura y la evolución de las galaxias espirales cercanas. Usamos principalmente observaciones en varias longitudes de onda, explotando las sinergías que nos permiten responder a las cuestiones más pertinentes sobre las propiedades principales de las galaxias, y cómo las galaxias han evolucionado hasta su actual estatus. Usamos imagenes y espectroscopía, en el ultravioleta, óptico, infrarrojo, milimétrico y radio, usando al máximo las facilidades de observación a nuestra disposición en España, en la ESO y en otros sitios, combinando los datos con herramientas de análisis modernas. El éxito de esta forma de trabajar se puede medir de las oportunidades de trabajo que se presentan a los que fueron miembros del grupo, del número y de la calidad de las colaboraciones con científicos importantes, de las citas a nuestro trabajo, y de las invitaciones para organizar o hablar en los congresos más importantes en el campo.

    En los últimos años nuestro grupo ha puesto mucho énfasis en abrir nuevas lineas de investigación conjuntas con informáticos, considerando el cambio de paradigma que está por venir debido a las enormes cantidades de datos que pronto producirán telescopios como LSST, Euclid, y SKA. Colaboramos con informáticos en la preparación de herramientas de análisis, incluyendo para la detección de estructura a partir del ruido, la corrección para la luz dispersa y el cirro de nuestra Vía Láctea, y el uso de técnicas basadas en machine learning. Así, una vez los telescopios LSST (2020) y Euclid (2023) empiezan a producir sus juegos de datos enormes, nuestro grupo estará preparado para analizarlos y extraer la ciencia.

    Investigador principal
    Personal del proyecto
    1. A partir de mapas térmicos y non-térmicos en radio del centro de NGC 1097 hemos descubierto que la formación de estrellas masivas se apaga por efectos non-térmicos, incluido la presión del campo magnético, rayos cósmicos y turbulencia.
    2. En el centro de NGC 7742 hemos detectado un disco interno y dos componentes estelares: una población vieja que contra-rota con el gas, y una joven, concentrado en un anillo, que rota con el gas.
    3. Hemos re-analizadas nuestras imágenes profundas IR de discos gruesos para corregir por el point spread function (PSF) extendido, confirmando todos nuestros previos resultados y en particular confirmando la presencia de una masa significativa en el componente del disco grueso.
    4. Analizando un mapa nuevo a alta resolución en el radio continuo a 1.5 GHz de e-Merlin, junto con imágenes de HST y SDSS de NGC 5322, una galaxia elíptica que contiene chorros en radio, hemos encontrado que un chorro de baja luminosidad puede haber acabado con la formación estelar en el nucleo.
    5. A partir de observaciones con MUSE de la emisión Lyman-α a bajo brillo superficial alrededor de galaxias débiles a redshifts entre 3 y 6 hemos encontrado que la cobertura proyectoada en el cielo se aproxima al 100%.

    Publicaciones relacionadas

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      Context. While Euclid is an ESA mission specifically designed to investigate the nature of dark energy and dark matter, the planned unprecedented combination of survey area (∼15 000 deg2), spatial resolution, low sky-background, and depth also make Euclid an excellent space observatory for the study of the low surface brightness Universe

      Euclid Collaboration et al.

      Fecha de publicación:

      1
      2022
      Número de citas
      20
    • Euclid preparation. XIII. Forecasts for galaxy morphology with the Euclid Survey using deep generative models

      We present a machine learning framework to simulate realistic galaxies for the Euclid Survey, producing more complex and realistic galaxies than the analytical simulations currently used in Euclid. The proposed method combines a control on galaxy shape parameters offered by analytic models with realistic surface brightness distributions learned

      Euclid Collaboration et al.

      Fecha de publicación:

      1
      2022
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    • A low-cost chopping system and uncooled microbolometer array for ground-based astronomy

      Mid-Infrared imaging is vital for the study of a wide variety of astronomical phenomena, including evolved stars, exoplanets, and dust enshrouded processes such as star formation in galaxies. However, infrared detectors have traditionally been expensive and it is difficult to achieve the sensitivity needed to see beyond the overwhelming mid

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      4
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    • WALLABY pilot survey: H I gas disc truncation and star formation of galaxies falling into the Hydra I cluster

      We present results from our analysis of the Hydra I cluster observed in neutral atomic hydrogen (H I) as part of the Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY). These WALLABY observations cover a 60-square-degree field of view with uniform sensitivity and a spatial resolution of 30 arcsec. We use these wide-field observations to

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      Fecha de publicación:

      2
      2022
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    • Extragalactic Magnetism with SOFIA (Legacy Program) - II: A Magnetically Driven Flow in the Starburst Ring of NGC 1097

      Galactic bars are frequent in disk galaxies and they may support the transfer of matter toward the central engine of active nuclei. The barred galaxy NGC 1097 has magnetic forces controlling the gas flow at several kpc scales, which suggest that magnetic fields (B-fields) are dynamically important along the bar and nuclear ring. However, the effect

      Lopez-Rodriguez, Enrique et al.

      Fecha de publicación:

      12
      2021
      Número de citas
      14
    • Discovery and analysis of low-surface-brightness galaxies in the environment of NGC 1052

      The environment of NGC 1052 has recently attracted much attention because of the presence of low-surface-brightness galaxies (LSBGs) with apparently "exotic" properties, making it a region of high interest for the detection of new objects. We used public deep photometric data from the Dark Energy Camera Legacy Survey to carry out a comprehensive

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      Fecha de publicación:

      12
      2021
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    • Capturing the Physics of MaNGA Galaxies with Self-supervised Machine Learning

      As available data sets grow in size and complexity, advanced visualization tools enabling their exploration and analysis become more important. In modern astronomy, integral field spectroscopic galaxy surveys are a clear example of increasing high dimensionality and complex data sets, which challenges the traditional methods used to extract the

      Sarmiento, Regina et al.

      Fecha de publicación:

      11
      2021
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    • Extragalactic Magnetism with SOFIA (Legacy Program). I. The Magnetic Field in the Multiphase Interstellar Medium of M51

      The recent availability of high-resolution far-infrared (FIR) polarization observations of galaxies using HAWC+/SOFIA has facilitated studies of extragalactic magnetic fields in the cold and dense molecular disks. We investigate whether any significant structural differences are detectable in the kiloparsec-scale magnetic field of the grand design

      Borlaff, Alejandro S. et al.

      Fecha de publicación:

      11
      2021
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    • Fractal dimension of optical cirrus in Stripe82

      The geometric characteristics of dust clouds provide important information on the physical processes that structure such clouds. One of such characteristics is the 2D fractal dimension D of a cloud projected on to the sky plane. In previous studies, which were mostly based on infrared (IR) data, the fractal dimension of individual clouds was found

      Marchuk, Alexander A. et al.

      Fecha de publicación:

      12
      2021
      Número de citas
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    • Molecular gas and star formation within 12 strong galactic bars observed with IRAM-30 m

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      Fecha de publicación:

      10
      2021
      Número de citas
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    • LeMMINGs III. The e-MERLIN legacy survey of the Palomar sample: exploring the origin of nuclear radio emission in active and inactive galaxies through the [O III] - radio connection

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      Baldi, R. D. et al.

      Fecha de publicación:

      12
      2021
      Número de citas
      17
    • Introducing the LBT Imaging of Galactic Halos and Tidal Structures (LIGHTS) survey. A preview of the low surface brightness Universe to be unveiled by LSST

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      Trujillo, Ignacio et al.

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      10
      2021
      Número de citas
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    • WALLABY pre-pilot survey: two dark clouds in the vicinity of NGC 1395

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      Fecha de publicación:

      10
      2021
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    • Tracing satellite planes in the Sculptor group. I. Discovery of three faint dwarf galaxies around NGC 253

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      Fecha de publicación:

      8
      2021
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    • A feather on the hat: tracing the giant stellar stream around the Sombrero galaxy

      Recent evidence of extremely metal-rich stars found in the Sombrero galaxy (M104) halo suggests that this galaxy has undergone a recent major merger with a relatively massive galaxy. In this paper, we present wide-field deep images of the M104 outskirts obtained with a 18-cm amateur telescope with the purpose of detecting any coherent tidal

      Martínez-Delgado, David et al.

      Fecha de publicación:

      10
      2021
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    • The centres of M83 and the Milky Way: opposite extremes of a common star formation cycle

      In the centres of the Milky Way and M83, the global environmental properties thought to control star formation are very similar. However, M83's nuclear star formation rate (SFR), as estimated by synchrotron and H α emission, is an order of magnitude higher than the Milky Way's. To understand the origin of this difference we use ALMA observations of

      Callanan, Daniel et al.

      Fecha de publicación:

      8
      2021
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      16
    • A diffuse tidal dwarf galaxy destined to fade out as a "dark galaxy"

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      5
      2021
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    • The number of globular clusters around the iconic UDG DF44 is as expected for dwarf galaxies

      There is a growing consensus that the vast majority of ultradiffuse galaxies (UDGs) are dwarf galaxies. However, there remain a few UDGs that seem to be special in terms of their globular cluster (GC) systems. In particular, according to some authors, certain UDGs exhibit large GC populations when compared to expectations from their stellar (or

      Saifollahi, Teymoor et al.

      Fecha de publicación:

      4
      2021
      Número de citas
      38
    • Ultramassive Black Holes in the Most Massive Galaxies: M<SUB>BH</SUB>-σ versus M<SUB>BH</SUB>-R<SUB>b</SUB>

      We investigate the nature of the relations between black hole (BH) mass (MBH) and the central velocity dispersion (σ) and, for core-Sérsic galaxies, the size of the depleted core (Rb). Our sample of 144 galaxies with dynamically determined MBH encompasses 24 core-Sérsic galaxies, thought to be products of gas-poor mergers, and reliably identified

      Dullo, Bililign T. et al.

      Fecha de publicación:

      2
      2021
      Número de citas
      15
    • Composite bulges - II. Classical bulges and nuclear discs in barred galaxies: the contrasting cases of NGC 4608 and NGC 4643

      We present detailed morphological, photometric, and stellar-kinematic analyses of the central regions of two massive, early-type barred galaxies with nearly identical large-scale morphologies. Both have large, strong bars with prominent inner photometric excesses that we associate with boxy/peanut-shaped (B/P) bulges; the latter constitute ∼30 per

      Erwin, Peter et al.

      Fecha de publicación:

      4
      2021
      Número de citas
      15

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