Search results for "Galaxies: distances and redshifts"

showing 6 items of 6 documents

ELDAR, a new method to identify AGN in multi-filter surveys: the ALHAMBRA test case

2017

We present ELDAR, a new method that exploits the potential of medium- and narrow-band filter surveys to securely identify active galactic nuclei (AGN) and determine their redshifts. Our methodology improves on traditional approaches by looking for AGN emission lines expected to be identified against the continuum, thanks to the width of the filters. To assess its performance, we apply ELDAR to the data of the ALHAMBRA (Advance Large Homogeneous Area Medium Band Redshift Astronomical) survey, which covered an effective area of 2.38 deg2 with 20 contiguous medium-band optical filters down to F814W ≃ 24.5. Using two different configurations of  ELDAR in which we require the detection of at lea…

Cosmology and Nongalactic Astrophysics (astro-ph.CO)Active galactic nucleusactive [Galaxies][ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph]Continuum (design consultancy)FOS: Physical sciencesAstrophysicsSurveys01 natural sciencestechniques: photometricemission lines [Quasars]Galaxies: distances and redshiftssurveys0103 physical sciencesdistances and redshifts [Galaxies]Emission spectrumOptical filterdata analysis [Methods]010303 astronomy & astrophysicsPhysicsANÁLISE DE DADOSNumber density010308 nuclear & particles physicsphotometric [Techniques]galaxies: active – galaxies: distances and redshiftsAstronomy and AstrophysicsFilter (signal processing)Galaxies: activeAstrophysics - Astrophysics of Galaxiesmethods: data analysisGalaxyRedshiftquasars: emission linesSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Astrophysics - Cosmology and Nongalactic AstrophysicsMonthly Notices of the Royal Astronomical Society
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The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41

2013

[Aims]: We aim to illustrate the potentiality of the Advanced Large, Homogeneous Area, Medium-Band Redshift Astronomical (ALHAMBRA) survey to investigate the high-redshift universe through the detection of quasi stellar objects (QSOs) at redshifts higher than 5. [Methods]: We searched for QSOs candidates at high redshift by fitting an extensive library of spectral energy distributions-including active and non-active galaxy templates, as well as stars-to the photometric database of the ALHAMBRA survey (composed of 20 optical medium-band plus the 3 broad-band JHKs near-infrared filters). [Results]: Our selection over ≈1 square degree of ALHAMBRA data (∼1/4 of the total area covered by the sur…

QSOSAbsolute magnitudeCosmology and Nongalactic Astrophysics (astro-ph.CO)active [Galaxies]Young stellar objectContinuum (design consultancy)FOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsLuminosityhigh-redshift [Galaxies]emission lines [Quasars]Galaxies: distances and redshiftsdistances and redshifts [Galaxies]Astrophysics::Galaxy AstrophysicsPhysicsQuasars: emission linesGalaxies: high-redshiftGalaxies: evolutiongeneral [Quasars]Astronomy and AstrophysicsGalaxies: activeevolution [Galaxies]RedshiftGalaxyQuasars: generalBlack holeSpace and Planetary ScienceAstrophysics - Cosmology and Nongalactic Astrophysics
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The alhambra photometric system

2010

Aparicio Villegas, Teresa et al.

StandardsCosmology and Nongalactic Astrophysics (astro-ph.CO)media_common.quotation_subjectFOS: Physical sciencesPhotometric systemAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysicsfundamental parameters [Stars]Instrumentation: photometersPhotometry (optics)Galaxies: distances and redshiftsdistances and redshifts [Galaxies]Astrophysics::Solar and Stellar Astrophysicsobservations [Cosmology]Instrumentation and Methods for Astrophysics (astro-ph.IM)Stars: fundamental parametersAstrophysics::Galaxy Astrophysicsmedia_commonPhysicsCosmology: observationsphotometric [Techniques]Astrophysics::Instrumentation and Methods for AstrophysicsAstronomy and AstrophysicsSecond order momentsWavelengthStarsphotometers [Instrumentation]Space and Planetary ScienceSkyAstrophysics::Earth and Planetary AstrophysicsAstrophysics - Instrumentation and Methods for AstrophysicsTechniques: photometricAstrophysics - Cosmology and Nongalactic Astrophysics
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Euclid preparation. XII. Optimizing the photometric sample of the Euclid survey for galaxy clustering and galaxy-galaxy lensing analyses

2021

Pocino, A., et al. (Euclid Collaboration)

luminous red galaxiesCosmological parameterAstrophysicsSurveys01 natural sciencesCosmologytechniques: photometricgalaxiesGalaxies: distances and redshiftdistances and redshiftsSurvey010303 astronomy & astrophysicsWeak gravitational lensingPhysicsRedshift surveylsstastro-ph.COgalaxies: distances and redshiftsconstraintsAstrophysics - Cosmology and Nongalactic Astrophysicsredshift surveyCosmology and Nongalactic Astrophysics (astro-ph.CO)Cosmological parametersFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsphotometricSettore FIS/05 - Astronomia e Astrofisicasurveys0103 physical sciencesdistances and redshifts [Galaxies]cosmological parametersSpurious relationshipCluster analysisdark energy surveyAstrophysics::Galaxy Astrophysics010308 nuclear & particles physicsphotometric [Techniques]Astronomy and Astrophysicsspace115 Astronomy Space scienceRedshiftGalaxySpace and Planetary ScienceCosmological parameters; Galaxies: distances and redshifts; Surveys; Techniques: photometrictechniquesFocus (optics)[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]cosmologycosmic shearintrinsic alignments
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THE ALHAMBRA SURVEY: EVOLUTION OF GALAXY SPECTRAL SEGREGATION

2016

arXiv:1601.03668v1

statistical [Methods]Cosmology and Nongalactic Astrophysics (astro-ph.CO)Large-scale structure of universeFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesMethods statisticalGalaxies: distances and redshiftsMethods: data analysis0103 physical sciencesdistances and redshifts [Galaxies]observations [Cosmology]data analysis [Methods]010303 astronomy & astrophysicsMethods: statisticalAstrophysics::Galaxy AstrophysicsComputingMilieux_MISCELLANEOUSPhysics[PHYS]Physics [physics]010308 nuclear & particles physicsCosmology: observationsFísicaAstronomy and AstrophysicsAstrophysics - Astrophysics of GalaxiesGalaxySpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Astrophysics - Cosmology and Nongalactic Astrophysics
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Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography

2021

Ilbert, O., et al. (Euclid Collaboration)

statistical [Methods]IMPACTUNIVERSEAstrophysics01 natural sciencesDark energyGalaxies: distances and redshiftdark energyPHOTOMETRIC REDSHIFTS010303 astronomy & astrophysicsWeak gravitational lensingPhotometric redshiftmedia_commonPhysicsdistances and redshift [Galaxies]Dark energy; Galaxies: distances and redshifts; Methods: statisticalSIMULATIONastro-ph.CO3103 Astronomy and AstrophysicsProbability distributionSpectral energy distributiongalaxies: distances and redshiftsAstrophysics - Cosmology and Nongalactic AstrophysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)530 Physicsastro-ph.GAmedia_common.quotation_subjectFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic Astrophysics1912 Space and Planetary Science0103 physical sciencesdistances and redshifts [Galaxies]/dk/atira/pure/subjectarea/asjc/1900/1912DISTRIBUTIONSmethods: statistical010308 nuclear & particles physicsAstronomy and AstrophysicsPERFORMANCE115 Astronomy Space scienceAstrophysics - Astrophysics of GalaxiesEVOLUTIONGalaxyUniverseRedshiftSTELLARRESOLUTIONSpace and Planetary Science10231 Institute for Computational ScienceAstrophysics of Galaxies (astro-ph.GA)Dark energy/dk/atira/pure/subjectarea/asjc/3100/3103[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
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