Año de inicio
1986
Unidad organizativa
Institución organizadora
Subvenciones relacionadas:
General
Descripción
Este grupo desarrolla varios proyectos extragalácticos en diferentes rangos del espectro electromagnético utilizando satélites y telescopios en tierra para estudiar la evolución cosmológica de las galaxias y el origen de la actividad nuclear en galaxias activas. En el aspecto instrumental, el grupo forma parte del consorcio internacional que ha construido el instrumento SPIRE del Observatorio Espacial Herschel y del consorcio europeo que desarrolla el instrumento SAFARI para el telescopio espacial infrarrojo SPICA de las agencias espaciales ESA y JAXA.
Los proyectos principales en 2018 han sido:
a) Galaxias y cuásares distantes con emisión en el infrarrojo lejano descubiertas con el Observatorio Espacial Herschel en los "Key Projects" HerMES y Herschel-ATLAS.
b) Sloan Digital Sky Survey IV: galaxias del proyecto BELLS GALLERY y galaxias Lyman alpha muy luminosas
c) Participación en el desarrollo del instrumento SAFARI, una de las contribuciones europeas al telescopio espacial infrarrojo SPICA.
d) Descubrimiento de la estrella individual más distante conocida, en uno de los campos del proyecto "HST Frontier Fields"
e) Búsqueda de supernovas en galaxias distantes amplificadas por lentes gravitacionales.
f) Varios estudios con GTC de sistemas de absorción en la línea de visión a cuásares rojos.
Miembros
Investigador principal
Ismael
Pérez Fournon
Personal del proyecto
Dr.
Stefan Geier
Colaboradores
Herschel SPIRE, HerMES, Herschel-ATLAS, SPICA, SAFARI, BELLS GALLERY, SERVS, DEEPDRILL, SDSS-IV y SHARDS Frontier Fields
Resultados
- Marques-Chaves et al. (2018) presentan un estudio detallado de la galaxia submm HLock01 a z = 2.9574, una de las fuentes más brillantes magnificadas por una lente gravitacional descubiertas en el "Herschel Multi-tiered Extragalactic Survey".
- Rigopoulou et al. (2018) derivan la metalicidad de la fase gaseosa de la galaxia submm HLSW-01 utilizando observaciones espectroscópicas de líneas de estructura fina con Herschel. Encuentran que la metalicidad de galaxias submm luminosas es de tipo solar y que siguen la relación masa-metalicidad esperada para galaxias a z ∼ 3.
- Cornachione et al. (2018) presentan un estudio morfológico de 17 galaxias emisoras Lyman alpha magnificadas por lentes gravitacionales de la muestra BELLS GALLERY. El análisis combina el efecto de magnificación de las lentes fuertes galaxia-galaxia con la alta resolución angular del telescopio espacial Hubble para conseguir una resolución espacial de ~80 pc.
- Oteo et al. (2018) reportan la identificación de un protocúmulo de galaxias extremo en el universo temprano cuyo núcleo (denominado Núcleo Rojo Distante por su color muy rojo en las bandas de Herschel SPIRE) está formado por al menos 10 galaxias polvorientas con formación estelar, confirmadas espectroscópicamente a z = 4.002 con ALMA y ATCA.
- Kelly et al. (2018) reportan el descubrimiento de una estrella individual, Icarus, a un desplazamiento al rojo de 1.49, magnificada más de 2000 veces por el efecto de lente gravitacional del cúmulo de galaxias MACS J1149+222. Icarus está localizada en una galaxia espiral muy alejada de la tierra, su luz ha tardado 9000 millones de años en llegar a la tierra.
Actividad científica
Publicaciones relacionadas
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Thermal emission from the amorphous dust: An alternative possibility of the origin of the anomalous microwave emissionComplete studies of the radiative processes of thermal emission from the amorphous dust from microwave through far-infrared wavebands are presented by taking into account, self-consistently for the first time, the standard two-level systems (TLS) model of amorphous materials. The observed spectral energy distributions (SEDs) for the PerseusNashimoto, Masashi et al.
Fecha de publicación:
22020 -
The Role of Environment in Galaxy Evolution in the SERVS Survey. I. Density Maps and Cluster CandidatesWe use photometric redshifts derived from new u-band through 4.5 μm Spitzer IRAC photometry in the 4.8 deg 2 of the XMM-LSS field to construct surface density maps in the redshift range of 0.1─1.5. Our density maps show evidence for large-scale structure in the form of filaments spanning several tens of megaparsecs. Using these maps, we identifyKrefting, Nick et al.
Fecha de publicación:
22020 -
SCUBA-2 Ultra Deep Imaging EAO Survey (Studies). III. Multiwavelength Properties, Luminosity Functions, and Preliminary Source Catalog of 450 μm Selected GalaxiesWe construct a SCUBA-2 450 μm map in the COSMOS field that covers an area of 300 arcmin 2 and reaches a 1σ noise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 μm with signal-to-noise ratios >4.0 and analyze the physical properties of their multiwavelength counterparts. We find that most of the sources are at z ≲ 3Lim, Chen-Fatt et al.
Fecha de publicación:
22020 -
Have we seen all the galaxies that comprise the cosmic infrared background at 250 μm ≤ λ ≤ 500 μm?The cosmic infrared background (CIB) provides a fundamental observational constraint on the star formation history of galaxies over cosmic history. We estimate the contribution to the CIB from catalogued galaxies in the COSMOS field by using a novel map fitting technique on the Herschel SPIRE maps. Prior galaxy positions are obtained usingDuivenvoorden, S. et al.
Fecha de publicación:
12020 -
A SCUBA-2 selected Herschel-SPIRE dropout and the nature of this populationDusty star-forming galaxies (DSFGs) detected at z > 4 provide important examples of the first generations of massive galaxies. However, few examples with spectroscopic confirmation are currently known, with Hershel struggling to detect significant numbers of z > 6 DSFGs. NGP6_D1 is a bright 850 μm source (12.3 ± 2.5 mJy) with no counterparts atGreenslade, J. et al.
Fecha de publicación:
122019 -
Spitzer Catalog of Herschel-selected Ultrared Dusty Star-forming GalaxiesThe largest Herschel extragalactic surveys, H-ATLAS and HerMES, have selected a sample of “ultrared” dusty star-forming galaxies (DSFGs) with rising SPIRE flux densities (S 500 > S 350 > S 250; the so-called “500 μm risers”) as an efficient way for identifying DSFGs at higher redshift (z > 4). In this paper, we present a large Spitzer follow-upMa, Jingzhe et al.
Fecha de publicación:
102019 -
Rest-frame UV properties of luminous strong gravitationally lensed Lyα emitters from the BELLS GALLERY SurveyWe present deep rest-frame UV spectroscopic observations using the Gran Telescopio Canarias of six gravitationally lensed Lyα emitters (LAEs) at 2.36 < z < 2.82 selected from the BELLS GALLERY survey. By taking the magnifications into account, we show that LAEs can be as luminous as L Lyα ≃ 30 × 10 42 erg s -1 and M UV ≃ -23 (AB) without invokingMarques-Chaves, R. et al.
Fecha de publicación:
22020 -
HELP: a catalogue of 170 million objects, selected at 0.36-4.5 μm, from 1270 deg<SUP>2</SUP> of prime extragalactic fieldsWe present an optical to near-infrared (NIR) selected astronomical catalogue covering 1270 deg 2. This is the first attempt to systematically combine data from 23 of the premier extragalactic survey fields - the product of a vast investment of telescope time. The fields are those imaged by the Herschel Space Observatory that form the HerschelShirley, Raphael et al.
Fecha de publicación:
112019 -
A luminous stellar outburst during a long-lasting eruptive phase first, and then SN IIn 2018cnfWe present the results of the monitoring campaign of the Type IIn supernova (SN) 2018cnf (a.k.a. ASASSN-18mr). It was discovered about ten days before the maximum light (on MJD = 58 293.4 ± 5.7 in the V band, with MV = -18.13 ± 0.15 mag). The multiband light curves show an immediate post-peak decline with some minor luminosity fluctuationsPastorello, A. et al.
Fecha de publicación:
82019 -
Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet SpectrumWe model the ultraviolet spectra of the Seyfert 1 galaxy NGC 5548 obtained with the Hubble Space Telescope during the 6 month reverberation mapping campaign in 2014. Our model of the emission from NGC 5548 corrects for overlying absorption and deblends the individual emission lines. Using the modeled spectra, we measure the response to continuumKriss, G. A. et al.
Fecha de publicación:
82019 -
Discovery of a giant and luminous Lyα+C IV+He II nebula at z = 3.326 with extreme emission line ratiosWe present the discovery of HLock01-LAB, a luminous and large Lyα nebula at z = 3.326. Medium-band imaging and long-slit spectroscopic observations with the Gran Telescopio Canarias reveal extended emission in the Lyα 1215 Å, C IV 1550 Å, and He II 1640 Å lines over ˜100 kpc, and a total luminosity LLyα = (6.4 ± 0.1)×1044 erg s-1. HLock01-LABMarques-Chaves, R. et al.
Fecha de publicación:
92019 -
Relative Alignment between the Magnetic Field and Molecular Gas Structure in the Vela C Giant Molecular Cloud Using Low- and High-density TracersWe compare the magnetic field orientation for the young giant molecular cloud Vela C inferred from 500 μm polarization maps made with the BLASTPol balloon-borne polarimeter to the orientation of structures in the integrated line emission maps from Mopra observations. Averaging over the entire cloud we find that elongated structures in integratedFissel, Laura M. et al.
Fecha de publicación:
62019 -
Thermal properties of slowly rotating asteroids: results from a targeted surveyContext. Earlier work suggests that slowly rotating asteroids should have higher thermal inertias than faster rotators because the heat wave penetrates deeper into the subsurface. However, thermal inertias have been determined mainly for fast rotators due to selection effects in the available photometry used to obtain shape models required forMarciniak, A. et al.
Fecha de publicación:
52019 -
The evolution of luminous red nova AT 2017jfs in NGC 4470We present the results of our photometric and spectroscopic follow-up of the intermediate-luminosity optical transient AT 2017jfs. At peak, the object reaches an absolute magnitude of Mg = -15.46 ± 0.15 mag and a bolometric luminosity of 5.5 × 1041 erg s-1. Its light curve has the double-peak shape typical of luminous red novae (LRNe), with aPastorello, A. et al.
Fecha de publicación:
52019 -
Gaia-assisted selection of a quasar reddened by dust in an extremely strong damped Lyman-α absorber at z = 2.226Damped Lyman-α absorbers (DLAs) as a class of quasi-stellar object (QSO) absorption-line systems are currently our most important source of detailed information on the cosmic chemical evolution of galaxies. However, the degree to which this information is biased by dust remains to be understood. One strategy is to specifically search for QSOs thatGeier, S. J. et al.
Fecha de publicación:
52019 -
CO, H2O, H2O+ line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scalesUsing the Atacama Large Millimeter/submillimeter Array (ALMA), we report high angular-resolution observations of the redshift z = 3.63 galaxy H-ATLAS J083051.0+013224 (G09v1.97), one of the most luminous strongly lensed galaxies discovered by the Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS). We present 0.″2-0.″4 resolution images ofYang, C. et al.
Fecha de publicación:
42019 -
QUIJOTE scientific results - III. Microwave spectrum of intensity and polarization in the Taurus Molecular Cloud complex and L1527We present new intensity and polarization observations of the Taurus Molecular Cloud (TMC) region in the frequency range 10-20 GHz with the multifrequency instrument (MFI) mounted on the first telescope of the Q-U-I-JOint TEnerife (QUIJOTE) experiment. From the combination of the QUIJOTE data with the WMAP 9-yr data release, the Planck second dataPoidevin, F. et al.
Fecha de publicación:
62019 -
Submillimeter Polarization Spectrum of the Carina NebulaLinear polarization maps of the Carina Nebula were obtained at 250, 350, and 500 μm during the 2012 flight of the Balloon-borne Large Aperture Submillimeter Telescope for Polarimetry (BLASTPol). These measurements are combined with Planck 850 μm data in order to produce a submillimeter spectrum of the polarization fraction of the dust emissionShariff, Jamil A. et al.
Fecha de publicación:
22019 -
Confirming Herschel Candidate Protoclusters from ALMA/VLA CO ObservationsALMA 870 μm continuum imaging has uncovered a population of blends of multiple dusty star-forming galaxies (DSFGs) in sources originally detected with the Herschel Space Observatory. However, their pairwise separations are much smaller than what is found by ALMA follow-up of other single-dish surveys or expected from theoretical simulations. UsingGómez-Guijarro, C. et al.
Fecha de publicación:
22019 -
The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA-derived Quantities, Data Visualization Tools, and Stellar LibraryTwenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years of operation (2014 July–2017 July). This is the third data release for SDSS-IV, and the 15th from SDSS (Data Release Fifteen; DR15). New data come from MaNGA—we releaseAguado, D. S. et al.
Fecha de publicación:
22019
