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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Measures of star formation rates from infrared (Herschel) and UV (GALEX) emissions of galaxies in the HerMES fieldsThe reliability of infrared (IR) and ultraviolet (UV) emissions to measure star formation rates (SFRs) in galaxies is investigated for a large sample of galaxies observed with the Spectral and Photometric Imaging Receiver (SPIRE) and the Photodetector Array Camera and Spectrometer (PACS) instruments on Herschel as part of the Herschel Multi-TieredBuat, V. et al.
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112010 -
Mapping the interstellar medium in galaxies with Herschel/SPIREThe standard method of mapping the interstellar medium in a galaxy, by observing the molecular gas in the CO 1-0 line and the atomic gas in the 21-cm line, is largely limited with current telescopes to galaxies in the nearby universe. In this letter, we use SPIRE observations of the galaxies M 99 and M 100 to explore the alternative approach ofEales, S. A. et al.
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72010 -
Herschel/HerMES: the X-ray-infrared correlation for star-forming galaxies at z˜1For the first time, we investigate the X-ray/infrared (IR) correlation for star-forming galaxies (SFGs) at z˜ 1, using SPIRE submm data from the recently launched Herschel Space Observatory and deep X-ray data from the 2-Ms Chandra Deep Field-North survey. We examine the X-ray/IR correlation in the soft X-ray (SX; 0.5-2 keV) and hard X-ray (HX; 2Symeonidis, M. et al.
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112011 -
Herschel-SPIRE, far-infrared properties of millimetre-bright and -faint radio galaxiesWe present the first study of the far-infrared (FIR) properties of high-redshift, radio-selected ultraluminous infrared galaxies (ULIRGs) using deep observations obtained with the Spectral and Photometric Imaging Receiver (SPIRE) from the Herschel Multi-tiered Extragalactic Survey (HerMES). These galaxies span a large range of 850-μm fluxes fromChapman, S. C. et al.
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112010 -
Herschel-SPIRE observations of the disturbed galaxy NGC 4438We present Herschel-SPIRE observations of the perturbed galaxy NGC 4438 in the Virgo cluster. These images reveal the presence of extra-planar dust up to ~4-5 kpc away from the galaxy's disk. The dust closely follows the distribution of the stripped atomic and molecular hydrogen, supporting the idea that gas and dust are perturbed in a similarCortese, L. et al.
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72010 -
Herschel reveals a Tdust-unbiased selection of z ~ 2 ultraluminous infrared galaxiesUsing Herschel Photodetector Array Camera (PACS) and Spectral and Photometric Imaging Receiver (SPIRE) observations of Lockman Hole-North and Great Observatories Origins Deep Survey-North (GOODS-N) as part of the Herschel Multi-tiered Extragalactic Survey (HerMES) project, we explore the far-infrared (IR) properties of a sample of mid-IR-selectedMagdis, G. E. et al.
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112010 -
Herschel photometric observations of the nearby low metallicity irregular galaxy NGC 6822We present the first Herschel PACS and SPIRE images of the low-metallicity galaxy NGC 6822 observed from 70 to 500 μm and clearly resolve the H ii regions with PACS and SPIRE. We find that the ratio 250/500 is dependent on the 24 μm surface brightness in NGC 6822, which would locally link the heating processes of the coldest phases of dust in theGalametz, M. et al.
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72010 -
Herschel photometric observations of the low metallicity dwarf galaxy NGC 1705We present Herschel SPIRE and PACS photometeric observations of the low metallicity (Z ~ 0.35 Z&sun;) nearby dwarf galaxy, NGC 1705, in six wavelength bands as part of the Dwarf Galaxy Survey guaranteed time Herschel key program. We confirm the presence of two dominant circumnuclear IR-bright regions surrounding the central super star cluster thatO'Halloran, B. et al.
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72010 -
HerMES: SPIRE Science Demonstration Phase maps†‡We describe the production and verification of sky maps of the five Spectral and Photometric Imaging Receiver (SPIRE) fields observed as part of the Herschel Multi-tiered Extragalactic Survey (HerMES) during the Science Demonstration Phase (SDP) of the Herschel mission. We have implemented an iterative map-making algorithm [The SPIRE-HerMESLevenson, L. et al.
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112010 -
HerMES: SPIRE emission from radio-selected active galactic nucleiWe examine the rest-frame far-infrared emission from powerful radio sources with 1.4-GHz luminosity densities of 25 ≤ log(L1.4/W Hz-1) ≤ 26.5 in the extragalactic Spitzer First Look Survey field. We combine Herschel/SPIRE flux densities with Spitzer/Infrared Array Camera and Multiband Imaging Photometer for Spitzer infrared data to obtain total (?mSeymour, N. et al.
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52011 -
HerMES: point source catalogues from deep Herschel-SPIRE observationsWe describe the generation of single-band point source catalogues from submillimetre Herschel-SPIRE observations taken as part of the Science Demonstration Phase of the Herschel Multi-tiered Extragalactic Survey (HerMES). Flux densities are found by means of peak finding and the fitting of a Gaussian point-response function. With highly confusedSmith, A. J. et al.
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12012 -
HerMES: Lyman Break Galaxies Individually Detected at 0.7 <= z <= 2.0 in GOODS-N with Herschel/SPIREAs part of the Herschel Multi-tiered Extragalactic Survey we have investigated the rest-frame far-infrared (FIR) properties of a sample of more than 4800 Lyman break galaxies (LBGs) in the Great Observatories Origins Deep Survey North field. Most LBGs are not detected individually, but we do detect a sub-sample of 12 objects at 0.7 z 1.6 and oneBurgarella, D. et al.
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62011 -
HerMES: Herschel-SPIRE observations of Lyman break galaxiesWe present first results of a study of the submillimetre (submm) (rest-frame far-infrared) properties of z ~ 3 Lyman break galaxies (LBGs) and their lower redshift counterparts BX/BM galaxies, based on Herschel-SPIRE observations of the Northern field of the Great Observatories Origins Deep Survey (GOODS-N). We use stacking analysis to determineRigopoulou, D. et al.
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112010 -
HerMES: detection of cosmic magnification of submillimetre galaxies using angular cross-correlationCosmic magnification is due to the weak gravitational lensing of sources in the distant Universe by foreground large-scale structure leading to coherent changes in the observed number density of the background sources. Depending on the slope of the background source number counts, cosmic magnification causes a correlation between the background andWang, L. et al.
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62011 -
HerMES: deep number counts at 250 μm, 350 μm and 500 μm in the COSMOS and GOODS-N fields and the build-up of the cosmic infrared backgroundAims: The Spectral and Photometric Imaging REceiver (SPIRE) onboard the Herschel space telescope has provided confusion limited maps of deep fields at 250 μm, 350 μm, and 500 μm, as part of the Herschel Multi-tiered Extragalactic Survey (HerMES). Unfortunately, due to confusion, only a small fraction of the cosmic infrared background (CIB) can beBéthermin, M. et al.
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62012 -
HerMES: deep galaxy number counts from a P(D) fluctuation analysis of SPIRE Science Demonstration Phase observationsDusty, star-forming galaxies contribute to a bright, currently unresolved cosmic far-infrared background. Deep Herschel-Spectral and Photometric Imaging Receiver (SPIRE) images designed to detect and characterize the galaxies that comprise this background are highly confused, such that the bulk lies below the classical confusion limit. We analyseGlenn, J. et al.
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112010 -
HerMES: A Statistical Measurement of the Redshift Distribution of Herschel-SPIRE Sources Using the Cross-correlation TechniqueThe wide-area imaging surveys with the Herschel Space Observatory at submillimeter (sub-mm) wavelengths have now resulted in catalogs of the order of one-hundred-thousand dusty, starburst galaxies. These galaxies capture an important phase of galaxy formation and evolution, but, unfortunately, the redshift distribution of these galaxies, N(z), isMitchell-Wynne, K. et al.
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72012 -
FIR colours and SEDs of nearby galaxies observed with HerschelWe present infrared colours (in the 25-500 μm spectral range) and UV to radio continuum spectral energy distributions of a sample of 51 nearby galaxies observed with SPIRE on Herschel. The observed sample includes all morphological classes, from quiescent ellipticals to active starbursts. Active galaxies have warmer colour temperatures than normalBoselli, A. et al.
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72010 -
Dynamical Structure of the Molecular Interstellar Medium in an Extremely Bright, Multiply Lensed z ~= 3 Submillimeter Galaxy Discovered with HerschelWe report the detection of CO(J = 5 → 4), CO(J = 3 → 2), and CO(J = 1 → 0) emission in the strongly lensed, Herschel/SPIRE-selected submillimeter galaxy (SMG) HERMES J105751.1+573027 at z = 2.9574 ± 0.0001, using the Plateau de Bure Interferometer, the Combined Array for Research in Millimeter-wave Astronomy, and the Green Bank Telescope. TheRiechers, Dominik A. et al.
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52011 -
Discovery of a Multiply Lensed Submillimeter Galaxy in Early HerMES Herschel/SPIRE DataWe report the discovery of a bright (f(250 μm)>400 mJy), multiply lensed submillimeter galaxy HERMES J105751.1+573027 in Herschel/SPIRE Science Demonstration Phase data from the HerMES project. Interferometric 880 μm Submillimeter Array observations resolve at least four images with a large separation of ~9''. A high-resolution adaptive optics KpConley, A. et al.
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52011
