An Infrared View of the Coevolution of Massive Blackholes and Galaxies

Persistent Link:
http://hdl.handle.net/10150/194740
Title:
An Infrared View of the Coevolution of Massive Blackholes and Galaxies
Author:
Shi, Yong
Issue Date:
2008
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Massive blackhole (MBH) growth is now recognized as a critical ingredient of galaxy formation and evolution. To investigate the interplay between MBH growth and galaxy evolution, we have used the capabilities of the Spitzer Space Telescope to study active galactic nuclei (AGN) and luminous infrared galaxies. We have tested the unification model for radio-loud AGN by finding that radio quasars and some FRII radio galaxies follow a correlation between low-frequency radio and the 70 um emission, two presumably isotropic indicators of nuclear radiation. We have found that mid-IR obscuration (characterized by the strength of the silicate feature) correlates with the X-ray obscuration (characterized by the HI column density), such that low HI columns correspond to silicate emission while high columns correspond to silicate absorption, for various types of AGN. We have demonstrated that in situ electron acceleration is required for both jet and lobe emission in M87. We have measured aromatic features in local AGN, demonstrated the diverse nature (star formation vs. AGN) of the far-IR emission mechanism, and constructed the star formation luminosity functions of the AGN hosts. These luminosity functions are flatter than that of field galaxies, implying that the interplay between star formation and nuclear activity enhances both processes. For luminous infrared galaxies (LIRGs), we have characterized galaxy morphologies of a complete sample of LIRGs at z~1 and found that LIRGs at z~1 are as asymmetric as local ones, implying similar conditions within galaxies lead to a LIRG level of star formation.
Type:
text; Electronic Dissertation
Degree Name:
PhD
Degree Level:
doctoral
Degree Program:
Astronomy; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Rieke, George
Committee Chair:
Rieke, George

Full metadata record

DC FieldValue Language
dc.language.isoENen_US
dc.titleAn Infrared View of the Coevolution of Massive Blackholes and Galaxiesen_US
dc.creatorShi, Yongen_US
dc.contributor.authorShi, Yongen_US
dc.date.issued2008en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractMassive blackhole (MBH) growth is now recognized as a critical ingredient of galaxy formation and evolution. To investigate the interplay between MBH growth and galaxy evolution, we have used the capabilities of the Spitzer Space Telescope to study active galactic nuclei (AGN) and luminous infrared galaxies. We have tested the unification model for radio-loud AGN by finding that radio quasars and some FRII radio galaxies follow a correlation between low-frequency radio and the 70 um emission, two presumably isotropic indicators of nuclear radiation. We have found that mid-IR obscuration (characterized by the strength of the silicate feature) correlates with the X-ray obscuration (characterized by the HI column density), such that low HI columns correspond to silicate emission while high columns correspond to silicate absorption, for various types of AGN. We have demonstrated that in situ electron acceleration is required for both jet and lobe emission in M87. We have measured aromatic features in local AGN, demonstrated the diverse nature (star formation vs. AGN) of the far-IR emission mechanism, and constructed the star formation luminosity functions of the AGN hosts. These luminosity functions are flatter than that of field galaxies, implying that the interplay between star formation and nuclear activity enhances both processes. For luminous infrared galaxies (LIRGs), we have characterized galaxy morphologies of a complete sample of LIRGs at z~1 and found that LIRGs at z~1 are as asymmetric as local ones, implying similar conditions within galaxies lead to a LIRG level of star formation.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
thesis.degree.namePhDen_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineAstronomyen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRieke, Georgeen_US
dc.contributor.chairRieke, Georgeen_US
dc.contributor.committeememberEisenstein, Danielen_US
dc.contributor.committeememberFan, Xiaohuien_US
dc.contributor.committeememberGreen, Richarden_US
dc.contributor.committeememberImpey, Chrisen_US
dc.identifier.proquest2830en_US
dc.identifier.oclc659749893en_US
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