General
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.
Miembros
Actividad científica
Publicaciones relacionadas
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The Lockman-SpReSO project. Description, target selection, observations, and catalogue preparationContext. Extragalactic surveys are a key tool for better understanding the evolution of galaxies. Both deep and wide-field surveys serve to provide a clearer emerging picture of the physical processes that take place in and around galaxies, and to identify which of these processes are the most important in shaping the properties of galaxies. AimsGonzalez-Otero, Mauro et al.
Fecha de publicación:
12023 -
Nonsequential neural network for simultaneous, consistent classification, and photometric redshifts of OTELO galaxiesContext. Computational techniques are essential for mining large databases produced in modern surveys with value-added products. Aims: This paper presents a machine learning procedure to carry out a galaxy morphological classification and photometric redshift estimates simultaneously. Currently, only a spectral energy distribution (SED) fitting hasde Diego, J. A. et al.
Fecha de publicación:
112021 -
The miniJPAS survey: A preview of the Universe in 56 colorsThe Javalambre-Physics of the Accelerating Universe Astrophysical Survey (J-PAS) will scan thousands of square degrees of the northern sky with a unique set of 56 filters using the dedicated 2.55 m Javalambre Survey Telescope (JST) at the Javalambre Astrophysical Observatory. Prior to the installation of the main camera (4.2 deg 2 field-of-viewBonoli, S. et al.
Fecha de publicación:
92021 -
The OTELO survey. Revealing a population of low-luminosity active star-forming galaxies at z ∼ 0.9Aims: We study a sample of Hβ emission line sources at z ∼ 0.9 to identify the star-forming galaxies sample and characterise them in terms of line luminosity, stellar mass, star formation rate, and morphology. The final aim is to obtain the Hβ luminosity function of the star-forming galaxies at this redshift. Methods: We used the red tunable filterNavarro Martínez, Rocío et al.
Fecha de publicación:
92021 -
The OTELO Survey: The Star Formation Rate Evolution of Low-mass GalaxiesWe present the analysis of a sample of Hα, Hβ, and [O II] emission line galaxies from the OTELO survey, with masses typically below $\mathrm{log}({M}_{* }/{M}_{\odot })\sim 9.4$ and redshifts between z ~ 0.4 and 1.43. We study the star formation rate, star formation rate density, and their number density and evolution with redshift. We obtain aCedrés, Bernabé et al.
Fecha de publicación:
72021 -
The OTELO survey. Faint end of the luminosity function of [O II]3727 emitters at ⟨z⟩ = 1.43Aims: In this paper, we aim to study the main properties and luminosity function (LF) of the [O II]3727 emitters detected in the OTELO survey in order to characterise the star formation processes in low-mass galaxies at z ∼ 1.43 and to constrain the faint-end of the LF. Methods: Here, we describe the selection method and analysis of the emittersCedrés, B. et al.
Fecha de publicación:
52021 -
The OTELO survey as a morphological probe. Last ten Gyr of galaxy evolution. The mass-size relation up to z = 2Context. The morphology of galaxies provide us with a unique tool for relating and understanding other physical properties and their changes over the course of cosmic time. It is only recently that we have been afforded access to a wealth of data for an unprecedented number galaxies thanks to large and deep surveys. Aims: We present theNadolny, Jakub et al.
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32021 -
GLACE survey: Galaxy activity in ZwCl0024+1652 cluster from strong optical emission linesAlthough ZwCl0024+1652 galaxy cluster at z ∼ 0.4 has been thoroughly analysed, it lacks a comprehensive study of star formation and nuclear activity of its members. With GaLAxy Cluster Evolution (GLACE) survey, a total of 174 H α emission-line galaxies (ELGs) were detected, most of them having [N II]. We reduced and analysed a set of [O III] and HBeyoro-Amado, Zeleke et al.
Fecha de publicación:
22021 -
Galaxy classification: deep learning on the OTELO and COSMOS databasesContext. The accurate classification of hundreds of thousands of galaxies observed in modern deep surveys is imperative if we want to understand the universe and its evolution. Aims: Here, we report the use of machine learning techniques to classify early- and late-type galaxies in the OTELO and COSMOS databases using optical and infraredde Diego, José A. et al.
Fecha de publicación:
62020 -
The OTELO survey. Nature and mass-metallicity relation for Hα emitters at z ∼ 0.4Context. A sample of low-mass Hα emission line sources at z ∼ 0.4 was studied in the context of the mass-metallicty relation (MZR) and its possible evolution. We drew our sample from the OSIRIS Tunable Emission Line Object (OTELO) survey, which exploits the red tunable filter of OSIRIS at the Gran Telescopio Canarias to perform a blind narrow-bandNadolny, Jakub et al.
Fecha de publicación:
42020 -
The OTELO survey. A case study of [O III] λ4959,5007 emitters at ⟨z⟩ = 0.83Context. The OSIRIS Tunable Filter Emission Line Object (OTELO) survey is a very deep, blind exploration of a selected region of the Extended Groth Strip and is designed for finding emission-line sources (ELSs). The survey design, observations, data reduction, astrometry, and photometry, as well as the correlation with ancillary data used to obtainBongiovanni, Ángel et al.
Fecha de publicación:
32020 -
The OTELO survey. III. Demography, morphology, IR luminosity and environment of AGN hostsAims: We take advantage of the capabilities of the OSIRIS Tunable Emission Line Object (OTELO) survey to select and study the AGN population in the field. In particular, we aim to perform an analysis of the properties of these objects, including their demography, morphology, and IR luminosity. Focusing on the population of Hα emitters at z ̃ 0.4Ramón-Pérez, Marina et al.
Fecha de publicación:
112019 -
Stellar populations of galaxies in the ALHAMBRA survey up to z ̃ 1. III. The stellar content of the quiescent galaxy population during the last 8 GyrAims: We aim at constraining the stellar population properties of quiescent galaxies. These properties reveal how these galaxies evolved and assembled since z ̃ 1 up to the present time. Methods: Combining the ALHAMBRA multi-filter photo-spectra with the fitting code for spectral energy distribution MUFFIT (MUlti-Filter FITting), we built aDíaz-García, L. A. et al.
Fecha de publicación:
112019 -
Stellar populations of galaxies in the ALHAMBRA survey up to z ̃ 1. II. Stellar content of quiescent galaxies within the dust-corrected stellar mass-colour and the UVJ colour-colour diagramsAims: Our aim is to determine the distribution of stellar population parameters (extinction, age, metallicity, and star formation rates) of quiescent galaxies within the rest-frame stellar mass-colour diagrams and UVJ colour-colour diagrams corrected for extinction up to z ̃ 1. These novel diagrams reduce the contamination in samples of quiescentDíaz-García, L. A. et al.
Fecha de publicación:
112019 -
The OTELO survey. II. The faint-end of the Hα luminosity function at z ̃ 0.40Aims: We take advantage of the capability of the OTELO survey to obtain the Hα luminosity function (LF) at z ̃ 0.40. Because of the deepest coverage of OTELO, we are able to determine the faint end of the LF, and thus better constrain the star formation rate and the number of galaxies at low luminosities. The AGN contribution to this LF isRamón-Pérez, Marina et al.
Fecha de publicación:
112019 -
The OTELO survey. I. Description, data reduction, and multi-wavelength catalogueContext. The evolution of galaxies through cosmic time is studied observationally by means of extragalactic surveys. The usefulness of these surveys is greatly improved by increasing the cosmological volume, in either depth or area, and by observing the same targets in different wavelength ranges. A multi-wavelength approach using differentBongiovanni, Ángel et al.
Fecha de publicación:
112019 -
A multiwavelength analysis of a collection of short-duration GRBs observed between 2012 and 2015We investigate the prompt emission and the afterglow properties of short-duration gamma-ray burst (sGRB) 130603B and another eight sGRB events during 2012-2015, observed by several multiwavelength facilities including the Gran Canarias Telescope 10.4 m telescope. Prompt emission high energy data of the events were obtained by INTEGRAL-SPI-ACSPandey, S. B. et al.
Fecha de publicación:
62019 -
A morphological study of galaxies in ZwCl0024+1652, a galaxy cluster at redshift z ˜ 0.4The well-known cluster of galaxies ZwCl0024+1652 at z ˜ 0.4 lacks an in-depth morphological classification of its central region. While previous studies provide a visual classification of a patched area, we used the public code called galaxy Support Vector Machine (GALSVM) and HST/ACS data as well as the WFP2 master catalogue to automaticallyAmado, Zeleke Beyoro et al.
Fecha de publicación:
52019 -
J-PLUS: The Javalambre Photometric Local Universe SurveyThe Javalambre Photometric Local Universe Survey (J-PLUS ) is an ongoing 12-band photometric optical survey, observing thousands of square degrees of the Northern Hemisphere from the dedicated JAST/T80 telescope at the Observatorio Astrofísico de Javalambre (OAJ). The T80Cam is a camera with a field of view of 2 deg2 mounted on a telescope with aCenarro, A. J. et al.
Fecha de publicación:
22019 -
ALMA Observations of the Molecular Gas in the Elliptical Galaxy NGC 3557We present the results of CO interferometric observations of the southern elliptical galaxy NGC 3557 with ALMA. We have detected both the CO(1–0) emission line and a relatively strong continuum at 3 mm. The continuum shows a flat-spectrum central unresolved source (at our angular resolution of 0.″7) and two jets, associated with the larger-scaleVila-Vilaro, B. et al.
Fecha de publicación:
12019
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