Infrared observations and stellar populations modeling of starburst galaxies

Persistent Link:
http://hdl.handle.net/10150/282420
Title:
Infrared observations and stellar populations modeling of starburst galaxies
Author:
Engelbracht, Charles William, 1970-
Issue Date:
1997
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:
We present a study of a sample of starburst galaxies. The systems chosen for study range in age and strength. We have obtained high-quality infrared spectroscopy and imaging of 18 starburst galaxies and 4 early-type galaxies as a comparison sample of an old stellar population. The spectra consist of high-resolution data (R ∼ 3000) in the H (1.65μm) and K (2.2μm) bands and, in a few cases, the J (1.25μm) band; most of the J-band spectra were obtained at a resolution of 800. We obtained broadband images of all the galaxies in the J, H, and K bands, as well as narrowband images of several of the galaxies in the (1.0)S(1) line of H₂ and in Brγ. We use these data and data from the literature to constrain models of the nuclear starbursts for these galaxies. The high sensitivity and resolution of the spectra plus the use of a long slit allows us to derive kinematic properties of the nuclear region in addition to other constraints on the starburst population, such as ionizing flux and CO index. We compare the properties of these galaxies and suggest that a burst of star formation can account for the galaxy properties and that the range of properties observed is derived from a range of burst ages and strengths. Our high-quality data allow us to examine the properties of the (Fe II) and H₂ emission regions. We measure, for the first time, the density in the (Fe II) -emitting region of a starburst galaxy and find that this density is consistent with the origin of this emission in supernova remnants. We find, in contrast to earlier studies, that fluorescence plays a large role in the H₂ emission of some starburst galaxies.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Physics, Astronomy and Astrophysics.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Astronomy
Degree Grantor:
University of Arizona
Advisor:
Rieke, Marcia J.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleInfrared observations and stellar populations modeling of starburst galaxiesen_US
dc.creatorEngelbracht, Charles William, 1970-en_US
dc.contributor.authorEngelbracht, Charles William, 1970-en_US
dc.date.issued1997en_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.abstractWe present a study of a sample of starburst galaxies. The systems chosen for study range in age and strength. We have obtained high-quality infrared spectroscopy and imaging of 18 starburst galaxies and 4 early-type galaxies as a comparison sample of an old stellar population. The spectra consist of high-resolution data (R ∼ 3000) in the H (1.65μm) and K (2.2μm) bands and, in a few cases, the J (1.25μm) band; most of the J-band spectra were obtained at a resolution of 800. We obtained broadband images of all the galaxies in the J, H, and K bands, as well as narrowband images of several of the galaxies in the (1.0)S(1) line of H₂ and in Brγ. We use these data and data from the literature to constrain models of the nuclear starbursts for these galaxies. The high sensitivity and resolution of the spectra plus the use of a long slit allows us to derive kinematic properties of the nuclear region in addition to other constraints on the starburst population, such as ionizing flux and CO index. We compare the properties of these galaxies and suggest that a burst of star formation can account for the galaxy properties and that the range of properties observed is derived from a range of burst ages and strengths. Our high-quality data allow us to examine the properties of the (Fe II) and H₂ emission regions. We measure, for the first time, the density in the (Fe II) -emitting region of a starburst galaxy and find that this density is consistent with the origin of this emission in supernova remnants. We find, in contrast to earlier studies, that fluorescence plays a large role in the H₂ emission of some starburst galaxies.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectPhysics, Astronomy and Astrophysics.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineAstronomyen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRieke, Marcia J.en_US
dc.identifier.proquest9806804en_US
dc.identifier.bibrecord.b37541432en_US
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