Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses

Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses

Bibliographic Details
Main Author: Assef, Roberto Jose
Language:English
Published: The Ohio State University / OhioLINK 2010
Subjects:
Astronomy
Astrophysics
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=osu1281369360
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-osu12813693602021-08-03T06:00:16Z Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses Assef, Roberto Jose Astronomy Astrophysics <p>We present a study on the properties of galaxies and active galacticnuclei (AGNs), and of their evolution through cosmic time. We start by deriving an optimal basis of low resolution empirical spectral energy distribution (SED) templates for galaxies from 0.2 to 10 μm using observations of the NOAO Deep-Wide Field Survey (NDWFS) Boötes field. We use these templates to estimate photometric redshifts and K-corrections and to study the luminosity function of galaxies as a function of galaxy type and its evolution with redshift.</p><p>We then extend the set of SED templates to also include AGNs. Thewavelength range of these templates is expanded to 0.03-30 μmrange by adding GALEX FUV and NUV, and MIPS 24μm observations ofthe NDWFS Boötes field. We use these templates to estimatephotometric redshifts for AGNs and to study biases in mid-IR AGN color selection techniques. We also predict the color distribution ofobjects in the WISE mission and design an AGN color selection criterionfor it.</p><p>We also present a study of the J-band luminosity function of AGNsfrom redshift 0 to 6. Our sample is composed of a combination ofmid-IR and X-ray selected objects, which avoids the typical biases ofoptically selected samples. We model the luminosity function by adouble power-law and find that its evolution cannot be described byeither pure luminosity or pure density evolution, but must be acombination of both.</p><p>Finally, we present a study of possible biases in AGN black hole (BH)mass estimates based on the CIV, Hα and Hβ broademission lines using a sample of high redshift lensed quasars from the CASTLES project with observed-frame ultraviolet and near-infraredspectra. We find that that the residuals between CIV and Balmer linemass estimates are strongly correlated with the ratio of the UV andoptical continuum luminosities, and that removing this dependencyreduces the scatter between the UV and optical based BH mass estimates by a factor of approximately 2.</p> 2010-10-07 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1281369360 http://rave.ohiolink.edu/etdc/view?acc_num=osu1281369360 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Astronomy
Astrophysics
spellingShingle Astronomy
Astrophysics
Assef, Roberto Jose
Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses
author Assef, Roberto Jose
author_facet Assef, Roberto Jose
author_sort Assef, Roberto Jose
title Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses
title_short Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses
title_full Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses
title_fullStr Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses
title_full_unstemmed Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses
title_sort properties of active galactic nuclei and galaxies: spectral energy distributions, luminosity functions and black hole masses
publisher The Ohio State University / OhioLINK
publishDate 2010
url http://rave.ohiolink.edu/etdc/view?acc_num=osu1281369360
work_keys_str_mv AT assefrobertojose propertiesofactivegalacticnucleiandgalaxiesspectralenergydistributionsluminosityfunctionsandblackholemasses
_version_ 1719429264817782784

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