Evolución de Galaxias

    General
    Descripción

    El estudio de la evolución de las galaxias es un tema crucial de la Astronomía Extragaláctica moderna. Permite vincular las galaxias locales con las primeras que existieron en el universo. Pero para poder abordarlo es preciso obtener censos estadísticamente significativos de galaxias de distintas luminosidades, a distintas distancias. Observacionalmente implica ser capaz de observar objetos muy débiles, utilizando distintas técnicas y a distintas longitudes de onda, desde el dominio centimétrico hasta los rayos-gamma, no solo para estudiar distintos procesos físicos, y determinar las distribuciones espectrales de energía de las galaxias, sino debido al desplazamiento al rojo de las galaxias distantes.

    El proyecto que aquí se presenta está encaminado a explotar un conjunto de censos de galaxias multi-rango espectral de las mismas zonas del cielo que, combinados, constituyen la base de datos que llamamos "Evolución". Esta base de datos esta formada por los censos denominados OTELO y GLACE, de galaxias de campo y en cúmulos, respectivamente, obtenidos utilizando los filtros sintonizables ópticos de OSIRIS en el telescopio GTC; el censo Lockman SpReSO obtenido mediante espectroscopía óptica multiobjeto empleando OSIRIS en el GTC; y PEP, consistente en imágenes en el lejano infrarrojo obtenidas con el observatorio espacial Herschel de la ESA. Esta base de datos está enriquecida con datos auxiliares profundos procedentes de otros instrumentos, que abarcan desde las ondas centimétricas (utilizando el VLA) hasta los rayos X (utilizando el satélite XMM de la ESA).

    Por tanto, "Evolución" proporciona, para miles de galaxias a desplazamientos al rojo entre 0.4 y 7.0, su morfología y distancias, las luminosidades en líneas de emisión de distintos elementos, y del continuo óptico, infrarrojo cercano y lejano y rayos-X. El censo GLACE, de cúmulos de galaxias, obtenido mediante las mismas técnicas y a las mismas longitudes de onda que OTELO, permite comparar la evolución de las galaxias de campo con las de cúmulo, estudiando, así, la influencia del entorno. En suma, este conjunto de censos, permiten abordar varios aspectos críticos de la evolución de las galaxias tales como la variación de la tasa de formación estelar, la metalicidad, la luminosidad bolométrica, la extinción y la potencia de acreción de núcleos galácticos activos, entre otros temas, en función del tiempo cósmico y de la densidad ambiental. Todo ello incluso para las galaxias más débiles o las más distantes, al límite de las posibilidades de la actual instrumentación astronómica. Asimismo, la combinación de observaciones profundas a distintas longitudes de onda permitirá arrojar luz sobre las relaciones entre la confusa fauna de objetos observada a altos desplazamientos al rojo, y que nuestro grado de desconocimiento solo permite clasificar, hasta ahora, por la manera cómo se han detectado.

    Publicaciones relacionadas

    • General formulation for the calibration and characterization of narrow-gap etalons: the OSIRIS/GTC tunable filters case
      Tunable filters (TFs) are a powerful way of implementing narrow-band imaging mode over wide wavelength ranges, without the need of purchasing a large number of narrow-band filters covering all strong emission or absorption lines at any redshift. However, one of its main features is a wavelength variation across the field of view, sometimes termed
      González, J. J. et al.

      Fecha de publicación:

      10
      2014
      Número de citas
      15
    • The ALHAMBRA Survey: Bayesian photometric redshifts with 23 bands for 3 deg
      The Advance Large Homogeneous Area Medium-Band Redshift Astronomical (ALHAMBRA) survey has observed eight different regions of the sky, including sections of the Cosmic Evolution Survey (COSMOS), DEEP2, European Large-Area Infrared Space Observatory Survey (ELAIS), Great Observatories Origins Deep Survey North (GOODS-N), Sloan Digital Sky Survey
      Molino, A. et al.

      Fecha de publicación:

      7
      2014
      Número de citas
      89
    • The ALHAMBRA survey: evolution of galaxy clustering since z ˜ 1
      We study the clustering of galaxies as function of luminosity and redshift in the range 0.35 z 1.25 using data from the Advanced Large Homogeneous Area Medium-Band Redshift Astronomical (ALHAMBRA) survey. The ALHAMBRA data used in this work cover 2.38 deg2 in seven independent fields, after applying a detailed angular selection mask, with
      Arnalte-Mur, P. et al.

      Fecha de publicación:

      6
      2014
      Número de citas
      27
    • Herschel far-IR counterparts of SDSS galaxies: analysis of commonly used star formation rate estimates
      We study a hundred of galaxies from the spectroscopic Sloan Digital Sky Survey (SDSS) with individual detections in the far-infrared Herschel Photodetector Array Camera and Spectrometer bands (100 or 160 μm) and in the GALEX far-ultraviolet band up to z ˜ 0.4 in the COSMOS and Lockman Hole fields. The galaxies are divided into four spectral and
      Domínguez Sánchez, H. et al.

      Fecha de publicación:

      6
      2014
      Número de citas
      19
    • The ALHAMBRA survey: An empirical estimation of the cosmic variance for merger fraction studies based on close pairs
      Aims: Our goal is to estimate empirically the cosmic variance that affects merger fraction studies based on close pairs for the first time. Methods: We compute the merger fraction from photometric redshift close pairs with 10 h-1 kpc ≤ rp ≤ 50 h-1 kpc and Δv ≤ 500 km s-1 and measure it in the 48 sub-fields of the ALHAMBRA survey. We study the
      López-Sanjuan, C. et al.

      Fecha de publicación:

      4
      2014
      Número de citas
      16
    • The ultraviolet to far-infrared spectral energy distribution of star-forming galaxies in the redshift desert
      We analyse the rest-frame ultraviolet (UV) to near-infrared (near-IR) spectral energy distribution (SED) of Lyman-break galaxies (LBGs), star-forming (SF) BzK (sBzK) and UV-selected galaxies at 1.5 ≲ z ≲ 2.5 in the COSMOS, GOODS-N and GOODS-S fields. Additionally, we complement the multiwavelength coverage of the galaxies located in the GOODS
      Oteo, I. et al.

      Fecha de publicación:

      2
      2014
      Número de citas
      19
    • Jpcam: a 1.2 Gpixel Camera for the J-Pas Survey
      JPCam is a 14-CCD mosaic camera, using the new e2v 9k-by-9k 10 μm-pixel 16-channel detectors, to be deployed on a dedicated 2.55 m wide-field telescope at the OAJ (Observatorio Astrofísico de Javalambre) in Aragon, Spain. The camera is designed to perform a Baryon Acoustic Oscillations (BAO) survey of the northern sky. The J-PAS survey strategy
      Taylor, K. et al.

      Fecha de publicación:

      1
      2014
      Número de citas
      16
    • The evolution of the dust temperatures of galaxies in the SFR-M∗ plane up to z s 2
      We study the evolution of the dust temperature of galaxies in the SFR- M∗ plane up to z ~ 2 using far-infrared and submillimetre observations from the Herschel Space Observatory taken as part of the PACS Evolutionary Probe (PEP) and Herschel Multi-tiered Extragalactic Survey (HerMES) guaranteed time key programmes. Starting from a sample of
      Wuyts, S. et al.

      Fecha de publicación:

      1
      2014
      Número de citas
      213
    • Density waves and star formation in grand-design spirals
      Context. H II regions in the arms of spiral galaxies are indicators of recent star-forming processes. They may have been caused by the passage of the density wave or simply been created by other means near the arms. The study of these regions may give us clues to clarify the controversy about the existence of a triggering scenario, as proposed in
      Cepa, J. et al.

      Fecha de publicación:

      12
      2013
      Número de citas
      17
    • Serendipitous detection of an overdensity of Herschel-SPIRE 250 μm sources south of MRC 1138-26
      We report the serendipitous detection of a significant overdensity of Herschel-Spectral and Photometric Imaging Receiver 250 μm sources in the vicinity of MRC 1138-26. We use an adaptive kernel density estimate to quantify the significance, including a comparison with other fields. The overdensity has a size of ˜3.5-4 arcmin and stands out at ˜5σ
      Valtchanov, Ivan et al.

      Fecha de publicación:

      12
      2013
      Número de citas
      16
    • Multi-wavelength landscape of the young galaxy cluster RX J1257.2+4738 at z = 0.866. I. The infrared view
      Context. Many studies have shown how galaxy properties (e.g. colours, morphology, star-forming (SF) activity, active galactic nuclei population) change not only with redshift, but also with local galaxy density, revealing the important effect of the stellar/halo mass and the environment in the evolution of galaxies. A detailed analysis of the star
      Pintos-Castro, I. et al.

      Fecha de publicación:

      10
      2013
      Número de citas
      18
    • The ALHAMBRA survey: reliable morphological catalogue of 22 051 early- and late-type galaxies
      Advanced Large Homogeneous Area Medium Band Redshift Astronomical (ALHAMBRA) is photometric survey designed to trace the cosmic evolution and cosmic variance. It covers a large area of ˜4 deg2 in eight fields, where seven fields overlap with other surveys, allowing us to have complementary data in other wavelengths. All observations were carried
      Quintana, J. M. et al.

      Fecha de publicación:

      11
      2013
      Número de citas
      28
    • Lyman Break and ultraviolet-selected galaxies at z ˜ 1 - II. PACS 100 μm/160 μm FIR detections
      In this work, we report the Photodetector Array Camera and Spectrometer (PACS) 100 μm/160 μm detections of a sample of 42 GALEX-selected and far-infrared (FIR)-detected Lyman break galaxies (LBGs) at z ˜ 1 located in the Cosmic Evolution Survey (COSMOS) field and analyse their ultraviolet (UV) to FIR properties. The detection of these LBGs in the
      Oteo, I. et al.

      Fecha de publicación:

      10
      2013
      Número de citas
      19
    • Filter-induced Bias in Lyα Emitter Surveys: A Comparison between Standard and Tunable Filters. Gran Telescopio Canarias Preliminary Results
      Lyα emitter (LAE) surveys have successfully used the excess in a narrowband filter compared to a nearby broadband image to find candidates. However, the odd spectral energy distribution (SED) of LAEs combined with the instrumental profile has important effects on the properties of the candidate samples extracted from these surveys. We investigate
      de Diego, J. A. et al.

      Fecha de publicación:

      10
      2013
      Número de citas
      3
    • The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41
      Aims: We aim to illustrate the potentiality of the Advanced Large, Homogeneous Area, Medium-Band Redshift Astronomical (ALHAMBRA) survey to investigate the high-redshift universe through the detection of quasi stellar objects (QSOs) at redshifts higher than 5. Methods: We searched for QSOs candidates at high redshift by fitting an extensive library
      Matute, I. et al.

      Fecha de publicación:

      9
      2013
      Número de citas
      15
    • Lyman break and ultraviolet-selected galaxies at z ˜ 1 - I. Stellar populations from the ALHAMBRA survey
      We take advantage of the exceptional photometric coverage provided by the combination of GALEX data in the ultraviolet (UV) and the ALHAMBRA survey in the optical and near-infrared to analyse the physical properties of a sample of 1225 GALEX-selected Lyman break galaxies (LBGs) at 0.8 ≲ z ≲ 1.2 that are located in the COSMOS field. This is the
      Oteo, I. et al.

      Fecha de publicación:

      8
      2013
      Número de citas
      8
    • Dust-obscured star formation in the outskirts of XMMU J2235.3-2557, a massive galaxy cluster at z = 1.4
      Star formation (SF) in the galaxy populations of local massive clusters is reduced with respect to field galaxies, and tends to be suppressed in the core region. Indications of a reversal of the SF-density relation have been observed in a few z > 1.4 clusters. Using deep imaging from 100-500 μm from Photodetector Array Camera and Spectrometer (PACS
      Santos, J. S. et al.

      Fecha de publicación:

      8
      2013
      Número de citas
      30
    • The Herschel-PEP survey: evidence for downsizing in the hosts of dusty star-forming systems
      By making use of Herschel PACS Evolutionary Probe observations of the COSMOS and Extended Groth Strip fields, we have estimated the dependence of the clustering properties of FIR-selected sources on their 100 μm fluxes. Our analysis shows a tendency for the clustering strength to decrease with limiting fluxes. By assuming a power-law slope with γ =
      Magliocchetti, M. et al.

      Fecha de publicación:

      7
      2013
      Número de citas
      20
    • The deepest Herschel-PACS far-infrared survey: number counts and infrared luminosity functions from combined PEP/GOODS-H observations
      We present results from the deepest Herschel-Photodetector Array Camera and Spectrometer (PACS) far-infrared blank field extragalactic survey, obtained by combining observations of the Great Observatories Origins Deep Survey (GOODS) fields from the PACS Evolutionary Probe (PEP) and GOODS-Herschel key programmes. We describe data reduction and
      Magnelli, B. et al.

      Fecha de publicación:

      5
      2013
      Número de citas
      389
    • Far-infrared-detected Lyman-break galaxies at z ~ 3. Dust attenuation and dust correction factors at high redshift
      Lyman-break galaxies (LBGs) represent one of the kinds of star-forming galaxies that are found in the high-redshift universe. The detection of LBGs in the far-infrared (FIR) domain can provide very important clues on their dust attenuation and total star-formation rate (SFR), allowing a more detailed study than has been performed so far. In this
      Oteo, I. et al.

      Fecha de publicación:

      6
      2013
      Número de citas
      37

    Charlas relacionadas

    No se han encontrado charlas relacionadas.

    Congresos relacionados

    No se han encontrado congresos relacionados.