A5006203678- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- Calibration and Measurement Techniques
- Astrophysics and Cosmic Phenomena
- Spectroscopy and Laser Applications
- CCD and CMOS Imaging Sensors
- SAS software applications and methods
- Cosmology and Gravitation Theories
- Astro and Planetary Science
- Remote Sensing in Agriculture
- Scientific Research and Discoveries
- Pulsars and Gravitational Waves Research
- History and Developments in Astronomy
- Solar and Space Plasma Dynamics
- Radio Astronomy Observations and Technology
- Phase Equilibria and Thermodynamics
- Advanced Statistical Methods and Models
- Geophysics and Gravity Measurements
- Spectroscopy and Chemometric Analyses
Universidad de La Laguna
2014-2024
Instituto de Astrofísica de Canarias
2014-2024
Contipro (Czechia)
2017
Consejo Superior de Investigaciones Científicas
1990-2013
Abbott Fund
2011
Osservatorio astronomico di Bologna
2011
University of Bologna
2011
Unidades Centrales Científico-Técnicas
2007-2010
IAC (United States)
2010
Universidad Nacional Autónoma de México
2003
The Photodetector Array Camera and Spectrometer (PACS) is one of the three science instruments on ESA's far infrared submillimetre observatory. It employs two Ge:Ga photoconductor arrays (stressed unstressed) with 16x25 pixels, each, filled silicon bolometer 16x32 32x64 respectively, to perform integral-field spectroscopy imaging photometry in 60-210μ m wavelength regime. In mode, it simultaneously images bands, 60-85μ or 85-125μ\m 125-210μ m, over a field view ~1.75'x3.5', close Nyquist...
We exploit the deep and extended far infrared data sets (at 70, 100 160 um) of Herschel GTO PACS Evolutionary Probe (PEP) Survey, in combination with HERschel Multi tiered Extragalactic Survey (HerMES) at 250, 350 500 um, to derive evolution restframe 35 60 90 total (IR) luminosity functions (LFs) up z~4. detect very strong for IR LF combined a density evolution. In agreement previous findings, increases steeply z~1, then flattens between z~1 z~3 decrease z greater than 3. Galaxies different...
Deep far-infrared photometric surveys studying galaxy evolution and the nature of cosmic infrared background are a key strength Herschel mission. We describe scientific motivation for PACS Evolutionary Probe (PEP) guaranteed time program its role in complement surveys, field selection which includes popular multiwavelength fields such as GOODS, COSMOS, Lockman Hole, ECDFS, EGS. provide an account observing strategies data reduction methods used. An overview first science results illustrates...
We compare multi-wavelength SFR indicators out to z~3 in GOODS-South. Our analysis uniquely combines U-to-8um photometry from FIREWORKS, MIPS 24um and PACS 70, 100, 160um the PEP survey, Ha spectroscopy SINS survey. describe a set of conversions that lead continuity across indicators. A luminosity-independent conversion total infrared luminosity yields estimates LIR are median consistent with derived photometry, albeit significant scatter. Dust correction methods perform well at low...
We present results from the deepest Herschel-PACS (Photodetector Array Camera and Spectrometer) far-infrared blank field extragalactic survey, obtained by combining observations of GOODS (Great Observatories Origins Deep Survey) fields PACS Evolutionary Probe (PEP) GOODS-Herschel key programmes. describe data reduction construction images catalogues. In parts GOODS-S field, catalogues reach 3-sigma depths 0.9, 0.6 1.3 mJy at 70, 100 160 um, respectively, resolve ~75% cosmic infrared...
(Abridged) We study relationships between the SFR and nuclear properties of X-ray selected AGNs out to z=2.5, using far-IR data in three extragalactic deep fields as part PACS Evolutionary Probe (PEP) program. Guided by studies intrinsic infra-red AGN SEDs, we show that majority FIR emission is produced cold dust heated star-formation. uncover characteristic redshift-dependent trends mean luminosity (L_fir) accretion (L_agn) AGNs. At low luminosities, are uncorrelated at all redshifts,...
We study a sample of 61 submillimetre galaxies (SMGs) selected from ground-based surveys, with known spectroscopic redshifts and observed Herschel as part the PACS Evolutionary Probe (PEP) Multi-tiered Extragalactic Survey (HerMES) key programmes. use broad far-infrared wavelength coverage (100-600um) provided by combination SPIRE observations. Using power-law temperature distribution model to derive infrared luminosities dust temperatures, we measure emissivity spectral index for SMGs...
Star formation rate (SFR), metallicity and stellar mass are within the important parameters of star--forming galaxies that characterize their evolution. They known to be related each other at low high redshift in mass--metallicity, mass--SFR, metallicity--SFR relations. In this work we demonstrate existence a plane 3D space defined by axes SFR [log(SFR)(M_sun yr^-1)], gas [12+log(O/H)], [log(M_star/M_sun)] star-forming galaxies. We used from "main galaxy sample" Sloan Digital Sky...
We set out to determine the ratio, q(IR), of rest-frame 8-1000um flux, S(IR), monochromatic radio S(1.4GHz), for galaxies selected at far-IR and wavelengths, search signs that ratio evolves with redshift, luminosity or dust temperature, identify any far-IR-bright outliers - useful laboratories exploring why far-IR/radio correlation is generally so tight when prevailing theory suggests variations are almost inevitable. use flux-limited 250-um 1.4-GHz samples, obtained in GOODS-N using...
We exploit deep observations of the GOODS-N field taken with PACS, on board Herschel, as part PEP guaranteed time, to study link between star formation and stellar mass in galaxies z~2. Starting from a mass-selected sample ~4500 mag[4.5mu]<23 (AB), we identify ~350 objects PACS detection at 100 or 160mu ~1500 only Spitzer 24 mu counterpart. Stellar masses total IR luminosities (LIR) are estimated by fitting SEDs. Consistently other Herschel results, find that LIR based data is overestimated...
We compare the average star formation (SF) activity in X-ray selected AGN hosts with a mass-matched control sample of inactive galaxies, including both forming and quiescent sources, 0.5 < z 2.5 redshift range. Recent observations carried out by PACS, 60−210 μm photometric camera on board Herschel Space Observatory, GOODS-S, GOODS-N COSMOS allow us to obtain an unbiased estimate far-IR luminosity, hence SF properties, two samples. Accurate host stellar mass estimates are obtained decomposing...
We study the evolution of dust temperature galaxies in SFR− M∗ plane up to z ~ 2 using far-infrared and submillimetre observations from Herschel Space Observatory taken as part PACS Evolutionary Probe (PEP) Multi-tiered Extragalactic Survey (HerMES) guaranteed time key programmes. Starting a sample with reliable star-formation rates (SFRs), stellar masses (M∗) redshift estimates, we grid M∗parameter space several ranges estimate mean (Tdust) each SFR–M∗ − bin. Dust temperatures are inferred...
The <i>Herschel<i/> Space Observatory enables us to accurately measure the bolometric output of starburst galaxies and active galactic nuclei (AGN) by directly sampling peak their far-infrared (IR) emission. Here we examine whether spectral energy distribution (SED) dust temperature have strongly evolved over last 80% age Universe. We discuss possible consequences for determination star-formation rates (SFR) any evidence a major change in properties. use deep extragalactic surveys from 100...
The cosmic infrared background (CIB) includes roughly half of the energy radiated by all galaxies at wavelengths across time, as observed present epoch. PACS Evolutionary Probe (PEP) survey is exploited here to study CIB and its redshift differential, 70, 100 160 micron, where peaks. Combining observations GOODS-S, GOODS-N, Lockman Hole COSMOS areas, we define number counts spanning over more than two orders magnitude in flux: from ~1 mJy few hundreds mJy. Stacking 24 micron sources P(D)...
Sensitive Herschel far-infrared observations can break degeneracies that were inherent to previous studies of star formation in high-z AGN hosts. Combining PACS 100 and 160um the GOODS-N field with 2Msec Chandra data, we detect ~20% X-ray individually at >3sig. The host luminosity L2-10~10^43erg/s increases redshift by an order magnitude from z=0 z~1. In contrast, there is little dependence on luminosity, for L2-10<~10^44erg/s z>~1. We do not find a obscuring column, our sample which...
Here we describe the first results of Advanced Large Homogeneous Area Medium-Band Redshift Astronomical (ALHAMBRA) survey, which provides cosmic tomography evolution contents universe over most history. Our novel approach employs 20 contiguous, equal-width, medium-band filters covering from 3500 Å to 9700 Å, plus standard JHKs near-infrared (NIR) bands, observe a total area 4 deg2 on sky. The optical photometric system has been designed maximize number objects with accurate classification by...
We present Gran Telescopio Canarias (GTC) optical transit narrowband photometry of the hot-Jupiter exoplanet XO-2b using OSIRIS instrument. This unique instrument has capabilities to deliver high-cadence photometric lightcurves, allowing us probe atmospheric composition hot Jupiters from ground. The observations were taken during three events that cover four wavelengths at spectral resolutions near 500, necessary for observing features, and have near-photon limited sub-mmag precisions....
We study the dust properties of galaxies in redshift range 0.1<z<2.8 observed by Herschel Space Observatory field Great Observatories Origins Deep Survey-North as part PEP and HerMES key programmes. Infrared (IR) luminosity (L_IR) temperature (T_dust) are derived from spectral energy distribution (SED) fit far-infrared (FIR) flux densities obtained with PACS SPIRE instruments onboard Herschel. As a reference sample, we also obtain IR luminosities temperatures local at z<0.1 using AKARI IRAS...
We present the Survey for High-z Absorption Red and Dead Sources (SHARDS), an ESO/GTC Large Program carried out using OSIRIS instrument on 10.4 m Gran Telescopio Canarias (GTC). SHARDS is ultra-deep optical spectro-photometric survey of GOODS-N field covering 130 arcmin2 at wavelengths between 500 950 nm with 24 contiguous medium-band filters (providing a spectral resolution R ∼ 50). The data reach AB magnitude 26.5 (at least 3σ level) sub-arcsec seeing in all bands. SHARDS' main goal to...
The Advance Large Homogeneous Area Medium-Band Redshift Astronomical (ALHAMBRA) survey has observed eight different regions of the sky, including sections Cosmic Evolution Survey (COSMOS), DEEP2, European Large-Area Infrared Space Observatory (ELAIS), Great Observatories Origins Deep North (GOODS-N), Sloan Digital Sky (SDSS) and Groth fields using a new photometric system with 20 optical, contiguous ∼300-Å filters plus JHKs bands. filter is designed to optimize effective redshift depth...
The effects of seeing on Sérsic r1/n profile parameters are extensively studied using a Moffat function. This analytical approximation to the point spread function (PSF) is shown provide best fit PSF predicted from atmospheric turbulence theory when β ∼ 4.765. additionally contain Gaussian as limiting case (β → ∞). also be numerically well behaved modelling narrow PSFs in HST images. Seeing computed for elliptically symmetric surface brightness distributions. widely used assumption circular...
The Optical System for Imaging and low Resolution Integrated Spectroscopy (OSIRIS) will be a Day-One instrument of the Spanish 10.4 m telescope Gran Telescopio Canarias, whose first light is planned 2002. GTC installed at Observatorio del Roque de los Muchachos in La Palma, Spain. OSIRIS three primary modes are imaging resolution long slit multiple object spectroscopy. designed to operate from 365 1000 nm with field view 7 by arcminutes maximum spectral 5000. Among main features use tunable...
view Abstract Citations (158) References (46) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Violent Star Formation in NGC 2363 Gonzalez-Delgado, Rosa M. ; Perez, Enrique Tenorio-Tagle, Guillermo Vilchez, Jose Terlevich, Elena Roberto Telles, Eduardo Rodriguez-Espinosa, Mas-Hesse, Miguel Garcia-Vargas, Maria Luisa Diaz, Angeles I. Cepa, Jordi Castaneda, Hector We present narrowband H-alpha imaging and long-slit optical near-infrared spectroscopy of the giant...
The constituents of the cosmic IR background (CIB) are studied at its peak wavelengths (100 and 160 <i>μ<i/>m) by exploiting <i>Herschel<i/>/PACS observations GOODS-N, Lockman Hole, COSMOS fields in PACS evolutionary probe (PEP) guaranteed-time survey. GOODS-N data reach 3<i>σ<i/> depths ~3.0 mJy 100 <i>μ<i/>m ~5.7 <i>μ<i/>m. At these levels, source densities 40 18 beams/source, respectively, thus hitting confusion limit Differential number counts extend from a few up to 100-200 mJy,...
The star formation rate (SFR) is a key parameter in the study of galaxy evolution. accuracy SFR measurements at z~2 has been questioned following disagreement between observations and theoretical models. latter predict SFRs this redshift that are typically factor 4 or more lower than measurements. We present star-formation rates based on calorimetric far-infrared (FIR) luminosities for massive 1.5<z<2.5, normal star-forming galaxies (SFGs), which do not depend extinction corrections and/or...