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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Spectroscopic analysis of the strongly lensed SN Encore: constraints on cosmic evolution of Type Ia supernovaeStrong gravitational lensing magnifies the light from a background source, allowing us to study these sources in detail. Here, we study the spectra of a $z = 1.95$ lensed Type Ia supernova (SN Ia) SN Encore for its brightest image A, taken 39 d apart. We infer the spectral age with template matching using the supernova identification (SNID )Dhawan, S. et al.
Fecha de publicación:
122024 -
A spectroscopic and kinematic survey of fast hot subdwarfsHot subdwarfs (sdO/B) are the stripped helium cores of red giants formed via binary interactions. Close hot subdwarf binaries with massive white dwarf companions have been proposed as possible progenitors of thermonuclear supernovae type Ia (SN Ia). If the supernova is triggered by stable mass transfer from the helium star, the companion shouldGeier, S. et al.
Fecha de publicación:
102024 -
A targeted search for strongly lensed supernovae with the Las Cumbres ObservatoryGravitationally lensed supernovae (glSNe) are of interest for time delay cosmology and SN physics. However, glSNe detections are rare, owing to the intrinsic rarity of SN explosions, the necessity of alignment with a foreground lens, and the relatively short window of detectability. We present the Las Cumbres Observatory Lensed Supernova SearchCraig, Peter et al.
Fecha de publicación:
102024 -
The Nature of 500 micron Risers III: a small complete sampleHerschel surveys have found large numbers of sources with red far-IR colours, and spectral energy distributions (SEDs) rising from 250 to 500 µm: 500 risers. The nature and role of these sources is not fully understood. We here present Submillimeter Array (SMA) interferometric imaging at 200 GHz of a complete sample of five 500 risers with F500 >44Clements, D. L. et al.
Fecha de publicación:
102024 -
Evidence for very massive stars in extremely UV-bright star-forming galaxies at z ∼ 2.2-3.6We present a comprehensive analysis of the presence of very massive stars (VMS > 100 M ⊙) in the integrated spectra of 13 UV-bright star-forming galaxies at 2.2 ≲ z ≲ 3.6 taken with the Gran Telescopio Canarias (GTC). These galaxies have very high UV absolute magnitudes (M UV ≃ −24), intense star formation (star formation rate ≃100 − 1000 M ⊙ yr −1Upadhyaya, A. et al.
Fecha de publicación:
62024 -
SN 2020pvb: A Type IIn-P supernova with a precursor outburstWe present photometric and spectroscopic datasets for SN 2020pvb, a Type IIn-P supernova (SN) that is similar to SNe 1994W, 2005cl, 2009kn, and 2011ht, with a precursor outburst detected (PS1 w band ∼-13.8 mag) around four months before the B-band maximum light. SN 2020pvb presents a relatively bright light curve that peaked at M B = −17.95 ± 0.30Elias-Rosa, N. et al.
Fecha de publicación:
62024 -
Lensed Type Ia Supernova "Encore" at z = 2: The First Instance of Two Multiply Imaged Supernovae in the Same Host GalaxyA bright (m F150W,AB = 24 mag), z = 1.95 supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply imaged as a result of strong gravitational lensing by a foreground galaxy cluster, detected in three locations, and remarkably is the second lensed SN found in the same host galaxy. The previousPierel, J. D. R. et al.
Fecha de publicación:
62024 -
JWST Photometric Time-delay and Magnification Measurements for the Triply Imaged Type Ia "SN H0pe" at z = 1.78Supernova (SN) SN H0pe is a gravitationally lensed, triply imaged, Type Ia SN (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0 cluster of galaxies. Well-observed multiply imaged SNe provide a rare opportunity to constrain the Hubble constant (H 0), by measuring the relative time delay between the images and modelingPierel, J. D. R. et al.
Fecha de publicación:
52024 -
A dusty protocluster surrounding the binary galaxy HerBS-70 at z = 2.3We report on deep SCUBA-2 observations at 850 $\mu$m and NOrthern Extended Millimetre Array (NOEMA) spectroscopic measurements at 2 mm of the environment surrounding the luminous, massive (M * ≈ 2 × 10 11 M ⊙) Herschel-selected source HerBS-70. This source was revealed by previous NOEMA observations to be a binary system of dusty star-formingBakx, Tom J. L. C. et al.
Fecha de publicación:
62024 -
The NOEMA observations of GN-z11: constraining the neutral interstellar medium and dust formation in the heart of cosmic reionization at z = 10.6We present results of dust continuum and [C II]$\, 158\, {\rm \mu m}$ emission line observations of a remarkably UV luminous (M UV = -21.6) galaxy at z = 10.603: GN-z11. Using the Northern Extended Millimeter Array (NOEMA), observations have been carried out over multiple observing cycles. We achieved a high sensitivity resulting in a $\lambda _{Fudamoto, Y. et al.
Fecha de publicación:
52024 -
Absence of radio-bright dominance in a near-infrared selected sample of red quasarsContext. The dichotomy between red and blue quasars is still an open question. It is debated whether red quasars are simply blue quasars that are observed at certain inclination angles or if they provide insight into a transitional phase in the evolution of quasars. Aims: We investigate the relation between quasar colors and radio-detected fractionVejlgaard, S. et al.
Fecha de publicación:
32024 -
Dynamics of 2023 FW<SUB>14</SUB>, the second L<SUB>4</SUB> Mars trojan, and a physical characterization using the 10.4 m Gran Telescopio CanariasContext. Known Mars trojans could be primordial small bodies that have remained in their present-day orbits for the age of the Solar System. Their orbital distribution is strongly asymmetric; there are over a dozen objects at the L 5 point and just one at L 4, (121514) 1999 UJ 7. Most L 5 trojans appear to form a collision-induced asteroid clusterde la Fuente Marcos, R. et al.
Fecha de publicación:
32024 -
Photometric and colorimetric studies of target objects using small and medium-size telescopesWe report on follow-up studies of transient events and objects, which have been conducted in recent years using ground-based optical observations. BVRI photometry has been performed with small and medium-sized telescopes located in Europe and North America. The purpose of these studies, which are mainly focused on objects of unknown nature, is toGodunova, V. G. et al.
Fecha de publicación:
22024 -
Characterization of Herschel-selected strong lens candidates through HST and sub-mm/mm observationsWe have carried out Hubble Space Telescope (HST) snapshot observations at 1.1 μm of 281 candidate strongly lensed galaxies identified in the wide-area extragalactic surveys conducted with the Herschel Space Observatory. Our candidates comprise systems with flux densities at $500\, \mu$m, S 500 ≥ 80 mJy. We model and subtract the surface brightnessBorsato, E. et al.
Fecha de publicación:
32024 -
Photometry of the Didymos System across the DART Impact ApparitionOn 2022 September 26, the Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the satellite of binary near-Earth asteroid (65803) Didymos. This demonstrated the efficacy of a kinetic impactor for planetary defense by changing the orbital period of Dimorphos by 33 minutes. Measuring the period change relied heavily on aMoskovitz, Nicholas et al.
Fecha de publicación:
22024 -
z-GAL: A NOEMA spectroscopic redshift survey of bright Herschel galaxies. I. Overview (Corrigendum)Cox, P. et al.
Fecha de publicación:
12024 -
Detailed spectrophotometric analysis of the superluminous and fast evolving SN 2019neqSN 2019neq was a very fast evolving superluminous supernova. At a redshift z = 0.1059, its peak absolute magnitude was -21.5 ± 0.2 mag in g band. In this work, we present data and analysis from an extensive spectrophotometric follow-up campaign using multiple observational facilities. Thanks to a nebular spectrum of SN 2019neq, we investigated someFiore, Achille et al.
Fecha de publicación:
12024 -
The black widow pulsar J1641+8049 in the optical, radio, and X-raysPSR J1641+8049 is a 2 ms black widow pulsar with the 2.2 h orbital period detected in the radio and γ-rays. We performed new phase-resolved multiband photometry of PSR J1641+8049 using the OSIRIS instrument at the Gran Telescopio Canarias. The obtained data were analysed together with the new radio-timing observations from the Canadian HydrogenKirichenko, A. Yu et al.
Fecha de publicación:
12024 -
A bright triple transient that vanished within 50 minWe report on three optically bright, ~16th mag, point sources within 10 arcsec of each other that vanished within 1 h, based on two consecutive exposures at Palomar Observatory on 1952 July 19 (POSS I Red and Blue). The three point sources have continued to be absent in telescope exposures during 71 yr with detection thresholds of ~21st mag. WeSolano, Enrique et al.
Fecha de publicación:
12024 -
A magnified compact galaxy at redshift 9.51 with strong nebular emission linesUltraviolet light from early galaxies is thought to have ionized gas in the intergalactic medium. However, there are few observational constraints on this epoch because of the faintness of those galaxies and the redshift of their optical light into the infrared. We report the observation, in JWST imaging, of a distant galaxy that is magnified byWilliams, Hayley et al.
Fecha de publicación:
42023
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OMAIRA GONZÁLEZ MARTÍN: “Los Observatorios en Canarias han sido clave para avanzar en el estudio de la actividad nuclear en galaxias”Fecha de publicación
