Evolution of Galaxies

    General
    Description

    Galaxy evolution is a crucial topic in modern extragalactic astrophysics, linking cosmology to the Local Universe. Their study requires collecting statistically significant samples of galaxies of different luminosities at different distances. It implies the ability to observe faint objects using different techniques, and at different wavelengths, from the centimetre regime to gamma-rays, noy only for comprehensively studying different physical processes, and constraining the spectral energy distribution of the targets, but due to the redshift of the distant galaxies.

    The project presented here is aimed to the scientific exploitation of a set of galaxy surveys, of the same areas of the sky, at different wavelengths, that form the database called "Evolución". This database is composed by the surveys OTELO and GLACE, of galaxies in field and clusters, respectively, obtained using the optical Tunable Filters of the instrument OSIRIS of the 10.4m GTC; the survey Lockman SpReSO, composed of optical spectra of galaxies obtained with the OSIRIS instrument at the GTC; and PEP, a survey of Far Infrared images obtained using the ESA Herschel spatial observatory. This database is enriched with ancillary data encompassing from the centimeter regimen (using VLA) through the X-Ray (using the ESA facility XMM).

    In this way, "Evolución" provides, for thousands of galaxies, the emission line fluxes of different elements, together with their morphologies and continuum in the optical, NIR, FIR and X-ray, from redshifts ranging from z = 0.4 up to 7.0. GLACE, the survey of clusters using the same techniques and wavelengths than OTELO, allow studying the evolution of cluster galaxies, comparing it with that derived from field ones using OTELO. With these surveys the team is tackling several critical aspects of galaxy evolution such as the evolution of star formation rates (SFR), metallicity, bolometric luminosity, extinction, and the accretion power of active galactic nuclei, among others, with cosmic time and environmental density, for even the faintest or the more distant galaxies observable with the currently existing facilities. Also, the combination of deep observations at different wavelengths, will allow shedding light on the relations among the different objects of the zoo observed at high redshift, which is still largely at stake.

    Obtaining the final OTELO catalogue corresponding to the first pointing, has been a milestone for the project. This catalogue represents the deepest extragalactic emission line survey so far obtained, and includes astrometry, and correlated ancillary data ranging from X-Rays to radio (cm). Deriving photometric redshifts and morphologies (using HST/ACS data) will allow the team to tackle the scientific exploitation of this survey. A Lyman-α candidate at a redshift larger than 6 is shown in the image below.

    Related publications

    • The Herschel PEP/HerMES luminosity function - I. Probing the evolution of PACS selected Galaxies to z ≃ 4

      We exploit the deep and extended far-IR data sets (at 70, 100 and 160 μm) of the Herschel Guaranteed Time Observation (GTO) PACS Evolutionary Probe (PEP) Survey, in combination with the Herschel Multi-tiered Extragalactic Survey data at 250, 350 and 500 μm, to derive the evolution of the rest-frame 35-, 60-, 90- and total infrared (IR) luminosity

      Gruppioni, C. et al.

      Advertised on:

      6
      2013
      Citations
      363
    • CL0024+1652 as seen by the Galaxy Cluster Evolution survey (GLACE)

      The GaLAxy Cluster Evolution survey (GLACE) is aimed to study the evolution of emission line galaxies in clusters across the cosmic time. It takes advantage of the tunable filter mode of OSIRIS (first light instrument of GTC) to scan Hα/[N II], Hβ, [O II] 3727 and [O III] 5007 searching for star formation activity and AGNs in clusters in three

      Pérez-Martínez, R. et al.

      Advertised on:

      4
      2013
      Citations
      2
    • X-ray luminosity functions of different morphological and X-ray type AGN populations

      Luminosity functions are one of the most important observational clues when studying galaxy evolution over cosmic time. In this paper we present the X-ray luminosity functions for X-ray detected AGN in the SXDS and GWS fields. The limiting fluxes of our samples are 9.0 ×10-15 and 4.8 ×10-16 erg cm-2 s-1 in the 0.5-7.0 keV band in the two fields

      Pović, M. et al.

      Advertised on:

      3
      2013
      Citations
      0
    • The Filling Factor-Radius Relation for 58 H II Regions across the Disk of NGC 6946

      Using the OSIRIS tunable narrowband imager on the 10.4 m GTC (La Palma), we have mapped the SAB(rs)cd galaxy NGC 6946 over a ~7.3 × 7.5 arcmin2 field in the emission lines of the [S II] λλ6717, 6731 doublet, and in Hα. From these maps we have produced catalogs of the Hα luminosities and effective radii of 557 H II regions across the disk, and

      Alfaro, Emilio J. et al.

      Advertised on:

      3
      2013
      Citations
      18
    • Probing nuclear activity versus star formation at z ˜ 0.8 using near-infrared multi-object spectroscopy

      We present near-infrared (NIR) spectroscopic observations of 28 X-ray and mid-infrared selected sources at a median redshift of z ˜ 0.8 in the Extended Groth Strip (EGS). To date this is the largest compilation of NIR spectra of active galactic nuclei (AGN) at this redshift. The data were obtained using the multi-object spectroscopic mode of the

      Rodríguez-Eugenio, N. et al.

      Advertised on:

      3
      2013
      Citations
      13
    • Evolution of the cosmological horizons in a universe with countably infinitely many state equations

      This paper is the second of two papers devoted to the study of the evolution of the cosmological horizons (particle and event horizons). Specifically, in this paper we consider a general accelerated universe with countably infinitely many constant state equations, and we obtain simple expressions in terms of their respective recession velocities

      Cepa, J. et al.

      Advertised on:

      2
      2013
      Citations
      9
    • Evolution of the cosmological horizons in a concordance universe

      The particle and event horizons are widely known and studied concepts, but the study of their properties, in particular their evolution, have only been done so far considering a single state equation in a decelerating universe. This paper is the first of two where we study this problem from a general point of view. Specifically, this paper is

      Cepa, Jordi et al.

      Advertised on:

      12
      2012
      Citations
      9
    • SHARDS: An Optical Spectro-photometric Survey of Distant Galaxies

      We present the Survey for High-z Absorption Red and Dead Sources (SHARDS), an ESO/GTC Large Program carried out using the OSIRIS instrument on the 10.4 m Gran Telescopio Canarias (GTC). SHARDS is an ultra-deep optical spectro-photometric survey of the GOODS-N field covering 130 arcmin2 at wavelengths between 500 and 950 nm with 24 contiguous medium

      Zamorano, Jaime et al.

      Advertised on:

      1
      2013
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      100
    • Rotational effects on the negative magnetic pressure instability

      Context. The surface layers of the Sun are strongly stratified. In the presence of turbulence with a weak mean magnetic field, a large-scale instability resulting in the formation of nonuniform magnetic structures, can be excited on the scale of many (more than ten) turbulent eddies (or convection cells). This instability is caused by a negative

      Losada, I.R. et al.

      Advertised on:

      12
      2012
      Citations
      18
    • The spectroscopic evolution of the recurrent nova T Pyxidis during its 2011 outburst. I. The optically thick phase and the origin of moving lines in novae

      Aims: We aim to derive the physical properties of the recurrent nova T Pyx and the structure of the ejecta during the early stages of expansion of the 2011 outburst. Methods: The nova was observed with high resolution spectroscopy (R ≈ 65 000), from one day after discovery of the outburst and until the last visibility of the star at the end of May

      Shore, S. N. et al.

      Advertised on:

      9
      2011
      Citations
      58
    • The PEP survey: clustering of infrared-selected galaxies and structure formation at z ˜ 2 in GOODS-South

      This paper presents the first direct estimate of the 3D clustering properties of far-infrared sources up to z˜ 3. This has been possible thanks to the PACS Evolutionary Probe (PEP) survey of the GOODS-South field performed with the PACS instrument on board the Herschel satellite. 550 and 502 sources were detected respectively in the 100- and 160-μm

      Magliocchetti, M. et al.

      Advertised on:

      9
      2011
      Citations
      29
    • Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry

      We present Gran Telescopio Canarias (GTC) optical transit narrowband photometry of the hot-Jupiter exoplanet XO-2b using the OSIRIS instrument. This unique instrument has the capabilities to deliver high-cadence narrowband photometric lightcurves, allowing us to probe the atmospheric composition of hot Jupiters from the ground. The observations

      Sing, D. K. et al.

      Advertised on:

      3
      2011
      Citations
      120
    • Discovery of a high-z protocluster with tunable filters: the case of 6C0140+326 at z= 4.4

      We present the first results obtained using a tunable narrow-band filter in the search for high-z protoclusters. Using the recently commissioned red tunable filter on the Gran Telescopio Canarias, we have searched for Lyα emitters in a 75 arcmin2 field centred on the z= 4.413 radio galaxy 6C0140+326. With three different wavelength tunings, we find

      Kuiper, E. et al.

      Advertised on:

      10
      2011
      Citations
      28
    • Building the cosmic infrared background brick by brick with Herschel/PEP

      The cosmic infrared background (CIB) includes roughly half of the energy radiated by all galaxies at all wavelengths across cosmic time, as observed at the present epoch. The PACS Evolutionary Probe (PEP) survey is exploited here to study the CIB and its redshift differential, at 70, 100 and 160 μm, where the background peaks. Combining PACS

      Berta, S. et al.

      Advertised on:

      8
      2011
      Citations
      154
    • Spatially Resolved Spectroscopy and Chemical History of Star-forming Galaxies in the Hercules Cluster: The Effects of the Environment

      Spatially resolved spectroscopy has been obtained for a sample of 27 star-forming (SF) galaxies selected from our deep Hα survey of the Hercules cluster. We have applied spectral synthesis models to all emission-line spectra of this sample using the population synthesis code STARLIGHT and have obtained fundamental parameters of stellar components

      Petropoulou, V. et al.

      Advertised on:

      6
      2011
      Citations
      22
    • Comparison of star formation rates from Hα and infrared luminosity as seen by Herschel

      We empirically MD test the relation between the SFR(LIR) derived from the infrared luminosity, LIR, and the SFR(Hα) derived from the Hα emission line luminosity using simple conversion relations. We use a sample of 474 galaxies at z = 0.06-0.46 with both Hα detection [from 20k redshift Cosmological Evolution (zCOSMOS) survey] and new far-IR

      Domínguez-Sánchez, H. et al.

      Advertised on:

      10
      2012
      Citations
      28
    • Two-dimensional metallicity distribution of the ionized gas in NGC 628 and NGC 6946

      Aims: We present here two H II region catalogues with azimuthal resolution for the two grand design galaxies NGC 628 and NGC 6946. With the help of these catalogues, we study several properties of the star-forming processes occurring in spiral galaxies. Methods: We obtained direct imaging in the narrow-band filters centred at Hα, Hβ, [O II]λ3727

      Cedrés, B. et al.

      Advertised on:

      9
      2012
      Citations
      33
    • The mean star formation rate of X-ray selected active galaxies and its evolution from z ~ 2.5: results from PEP-Herschel

      We study relationships between star-formation rate (SFR) and the accretion luminosity and nuclear obscuration of X-ray selected active galactic nuclei (AGNs) using a combination of deep far-infrared (FIR) and X-ray data in three key extragalactic survey fields (GOODS-South, GOODS-North and COSMOS), as part of the PACS Evolutionary Probe (PEP)

      Rosario, D. J. et al.

      Advertised on:

      9
      2012
      Citations
      256
    • The Impact of Evolving Infrared Spectral Energy Distributions of Galaxies on Star Formation Rate Estimates

      We combine Herschel-Photodetector Array Camera and Spectrometer (PACS) data from the PACS Evolutionary Probe (PEP) program with Spitzer 24 μm and 16 μm photometry and ultra deep Infrared Spectrograph (IRS) mid-infrared spectra to measure the mid- to far-infrared spectral energy distribution (SED) of 0.7 < z < 2.5 normal star-forming galaxies (SFGs)

      Nordon, R. et al.

      Advertised on:

      2
      2012
      Citations
      93
    • The effect of environment on star forming galaxies at redshift. I. First insight from PACS

      We use deep 70, 100 and 160 μm observations taken with PACS, the Photodetector Array Camera and Spectrometer on board of Herschel, as part of the PACS Evolutionary Probe (PEP) guaranteed time, to study the relation between star formation rate and environment at redshift ~ 1 in the GOODS-S and GOODS-N fields. We use the SDSS spectroscopic catalog to

      Popesso, P. et al.

      Advertised on:

      8
      2011
      Citations
      48

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