Start year
1986
Organizational Unit
Organizing institutions
Grants related:
General
Description
This IAC research group carries out several extragalactic projects in different spectral ranges, using space as well as ground-based telescopes, to study the cosmological evolution of galaxies and the origin of nuclear activity in active galaxies. The group is a member of the international consortium which built the SPIRE instrument for the Herschel Space Observatory and of the European consortium which is developing the SAFARI instrument for the infrared space telescope SPICA of the space agencies ESA and JAXA.
The main projects in 2018 were:
a) High-redshift galaxies and quasars with far-infrared emission discovered with the Herschel Space Observatory in the HerMES and Herschel-ATLAS Key Projects.
b) Sloan Digital Sky Survey IV: BELLS GALLERY galaxies and very luminous Lyman alpha emitting galaxies.
c) Participation in the development of the SAFARI instrument, one of the European contributions to the SPICA infrared space telescope.
d) Discovery of the most distant individual star ever observed, in one of the fields of the "HST Frontier Fields".
e) Search for supernovae in distant, gravitationally lensed galaxies.
f) Several studies with GTC of absorption line systems in the line of sight to red quasars.
Members
Principal investigator
Ismael
Pérez Fournon
Project staff
Dr.
Stefan Geier
Collaborators
Herschel SPIRE, HerMES, Herschel-ATLAS, SPICA, SAFARI, BELLS GALLERY, SERVS, DEEPDRILL, SDSS-IV y SHARDS Frontier Fields
Results
- Marques-Chaves et al. (2018) present a study of the submillimeter galaxy HLock01 at z = 2.9574, one of the brightest gravitationally lensed sources discovered in the Herschel Multi-tiered Extragalactic Survey. Detailed analysis of the high signal-to-noise ratio (SNR) rest-frame UV GTC OSIRIS spectrum shows complex kinematics of the gas.
- Rigopoulou et al. (2018) using new, Herschel spectroscopic observations of key far-infrared fine structure lines of the z ∼ 3 galaxy HLSW-01 derive gas-phase metallicities and find that the metallicities of z ∼ 3 submm-luminous galaxies are consistent with solar metallicities and that they appear to follow the mass–metallicity relation expected for z ∼ 3 systems.
- Cornachione et al. (2018) present a morphological study of 17 lensed Lyα emitter (LAE) galaxies of the BELLS GALLERY sample. The analysis combines the magnification effect of strong galaxy–galaxy lensing with the high resolution of the Hubble Space Telescope to achieve a physical resolution of ~80 pc for this 2 < z < 3 LAE sample.
- Oteo et al. (2018) report the identification of an extreme protocluster of galaxies in the early universe whose core (nicknamed Distant Red Core, DRC, because of its very red color in Herschel SPIRE bands) is formed by at least 10 dusty star-forming galaxies (DSFGs), spectroscopically confirmed to lie at z = 4.002 via detection of emission lines with ALMA and ATCA.
- Kelly et al. (2018) report the discovery of an individual star, Icarus, at redshift z = 1.49 magnified by more than × 2,000 by gravitational lensing of the galaxy cluster MACS J1149+222. Icarus is located in a spiral galaxy that is so far from Earth that its light has taken 9000 million years to reach the Earth.
Scientific activity
Related publications
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
Advertised on:
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.
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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.
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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.
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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.
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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.
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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.
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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.
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22019
