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
-
Cold dust and young starbursts: spectral energy distributions of Herschel SPIRE sources from the HerMES surveyWe present spectral energy distributions (SEDs) for 68 Herschel sources detected at 5σ at 250, 350 and 500 μm in the HerMES SWIRE-Lockman field. We explore whether existing models for starbursts, quiescent star-forming galaxies and active galactic nucleus dust tori are able to model the full range of SEDs measured with Herschel. We find that whileRowan-Robinson, M. et al.
Advertised on:
112010 -
A Population of Dust-rich Quasars at z ~ 1.5We report Herschel SPIRE (250, 350, and 500 μm) detections of 32 quasars with redshifts 0.5Dai, Y. Sophia et al.
Advertised on:
72012 -
A Comprehensive View of a Strongly Lensed Planck-Associated Submillimeter GalaxyWe present high-resolution maps of stars, dust, and molecular gas in a strongly lensed submillimeter galaxy (SMG) at z = 3.259. HATLAS J114637.9-001132 is selected from the Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS) as a strong lens candidate mainly based on its unusually high 500 μm flux density (~300 mJy). It is the only highFu, Hai et al.
Advertised on:
72012 -
The Swift/Fermi GRB 080928 from 1 eV to 150 keVWe present the results of a comprehensive study of the gamma-ray burst 080928 and of its afterglow. GRB 080928 was a long burst detected by Swift/BAT and Fermi/GBM. It is one of the exceptional cases where optical emission had already been detected when the GRB itself was still radiating in the gamma-ray band. For nearly 100 s simultaneous opticalRossi, A. et al.
Advertised on:
52011 -
The Highly Energetic Expansion of SN 2010bh Associated with GRB 100316DWe present the spectroscopic and photometric evolution of the nearby (z = 0.059) spectroscopically confirmed Type Ic supernova, SN 2010bh, associated with the soft, long-duration gamma-ray burst (X-ray flash) GRB 100316D. Intensive follow-up observations of SN 2010bh were performed at the ESO Very Large Telescope (VLT) using the X-shooter and FORS2Bufano, Filomena et al.
Advertised on:
72012 -
The circumburst density profile around GRB progenitors: a statistical studyAccording to our present understanding, long gamma-ray bursts (GRBs) originate from the collapse of massive stars, while short bursts are caused by to the coalescence of compact stellar objects. Because the afterglow evolution is determined by the circumburst density profile, n(r), traversed by the fireball, it can be used to distinguish between aSchulze, S. et al.
Advertised on:
22011 -
The Afterglows of Swift-era Gamma-Ray Bursts. II. Type I GRB versus Type II GRB Optical AfterglowsGamma-ray bursts (GRBs) have been separated into two classes, originally along the lines of duration and spectral properties, called "short/hard" and "long/soft." The latter have been conclusively linked to the explosive deaths of massive stars, while the former are thought to result from the merger or collapse of compact objects. In recent yearsKann, D. A. et al.
Advertised on:
62011 -
The Afterglows of Swift-era Gamma-ray Bursts. I. Comparing pre-Swift and Swift-era Long/Soft (Type II) GRB Optical AfterglowsWe have gathered optical photometry data from the literature on a large sample of Swift-era gamma-ray burst (GRB) afterglows including GRBs up to 2009 September, for a total of 76 GRBs, and present an additional three pre-Swift GRBs not included in an earlier sample. Furthermore, we publish 840 additional new photometry data points on a total of 42Kann, D. A. et al.
Advertised on:
92010 -
Simultaneous polarization monitoring of supernovae SN 2008D/XT 080109 and SN 2007uy: isolating geometry from dustContext. The possible existence of a continuum encompassing the diversity of explosive stellar deaths, ranging from ordinary supernovae (SNe; lacking any sign of a relativistic outflow) to relativistic hypernovae associated with energetic long duration gamma-ray bursts (GRBs), is under intense debate. In this context, the supernova SN 2008DGorosabel, J. et al.
Advertised on:
112010 -
HerMES: SPIRE detection of high-redshift massive compact galaxies in GOODS-N fieldWe have analysed the rest-frame far-infrared properties of a sample of massive (M* > 1011Msolar) galaxies at 2Cava, A. et al.
Advertised on:
112010 -
Evidence for supernova-synthesized dust from the rising afterglow of GRB071025 at z ~ 5We present observations and analysis of the broad-band afterglow of Swift GRB071025. Using optical and infrared (RIYJHK) photometry, we derive a photometric redshift of 4.4 z 5.2; at this redshift our simultaneous multicolour observations begin at ~30 s after the gamma-ray burst trigger in the host frame, during the initial rising phase of thePerley, Daniel A. et al.
Advertised on:
82010 -
The Herschel Multi-tiered Extragalactic Survey: HerMESThe Herschel Multi-tiered Extragalactic Survey (HerMES) is a legacy programme designed to map a set of nested fields totalling ˜380 deg2. Fields range in size from 0.01 to ˜20 deg2, using the Herschel-Spectral and Photometric Imaging Receiver (SPIRE) (at 250, 350 and 500 μm) and the Herschel-Photodetector Array Camera and Spectrometer (PACS) (atOliver, S. J. et al.
Advertised on:
82012 -
Superdense Massive Galaxies in the Nearby UniverseSuperdense massive galaxies (re ~ 1 kpc; M ~ 1011 M sun) were common in the early universe (z gsim 1.5). Within some hierarchical merging scenarios, a non-negligible fraction (1%-10%) of these galaxies is expected to survive since that epoch, retaining their compactness and presenting old stellar populations in the present universe. Using the NYUTrujillo, I. et al.
Advertised on:
22009 -
A deep search for the host galaxies of gamma-ray bursts with no detected optical afterglowContext. Gamma-ray bursts (GRBs) can provide information about star formation at high redshifts. Even in the absence of a bright optical/near-infrared/radio afterglow, the high detection rate of X-ray afterglows by Swift/XRT and its localization precision of 2-3 arcsec facilitates the identification and the study of GRB host galaxies. Aims: WeRossi, A. et al.
Advertised on:
92012 -
Study of the NGC 2770 interstellar medium through Hα, millimetric and optical polarimetric data of SN 2008D and SN 2007uyWe present the preliminary results of the recent Hα narrow-band imaging carried out for NGC 2770 with the Gran Telescopio Canarias (GTC) equipped with OSIRIS. We put the polarization measurements reported in Gorosabel et al. (2010) for SN 2007uy and SN 2008D in the context of the morphological information inferred from the Hα imaging. We estimatedGorosabel, J. et al.
Advertised on:
42011 -
Far-infrared properties of submillimeter and optically faint radio galaxiesWe use deep observations obtained with the Photodetector Array Camera and Spectrometer (PACS) onboard the Herschel Space Observatory to study the far-infrared (FIR) properties of submillimeter and optically faint radio galaxies (SMGs and OFRGs). From literature we compiled a sample of 35 securely identified SMGs and nine OFRGs located in the GOODSMagnelli, B. et al.
Advertised on:
72010 -
The far-infrared/radio correlation as probed by HerschelWe set out to determine the ratio, qIR, of rest-frame 8-1000-μm flux, SIR, to monochromatic radio flux, S1.4 GHz, for galaxies selected at far-infrared (IR) and radio wavelengths, to search for signs that the ratio evolves with redshift, luminosity or dust temperature, Td, and to identify any far-IR-bright outliers - useful laboratories forIvison, R. J. et al.
Advertised on:
72010 -
Herschel unveils a puzzling uniformity of distant dusty galaxiesThe Herschel Space Observatory enables us to accurately measure the bolometric output of starburst galaxies and active galactic nuclei (AGN) by directly sampling the peak of their far-infrared (IR) emission. Here we examine whether the spectral energy distribution (SED) and dust temperature of galaxies have strongly evolved over the last 80% of theElbaz, D. et al.
Advertised on:
72010 -
Evolution of dust temperature of galaxies through cosmic time as seen by HerschelWe study the dust properties of galaxies in the redshift range 0.1 ~ 5 × 1010Lsolar appears to be 2-5K colder than that of AKARI-selected local galaxies with similar luminosities, and the dispersion in Tdust for high-z galaxies increases with LIR due to the existence of cold galaxies that are not seen among local galaxies. We show that this largeHwang, H. S. et al.
Advertised on:
112010 -
Intracluster light in the Virgo cluster: large scale distributionAims: The intracluster light (ICL) is a faint diffuse stellar component of clusters made of stars that are not bound to individual galaxies. We have carried out a large scale study of this component in the nearby Virgo cluster. Methods: The diffuse light is traced using planetary nebulae (PNe). The surveyed areas were observed with a narrow-bandCastro-Rodriguéz, N. et al.
Advertised on:
112009
