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Star Formation and Metallicity in High EQW(Ha) Galaxies

Permanent Link: http://ncf.sobek.ufl.edu/NCFE003685/00001

Material Information

Title: Star Formation and Metallicity in High EQW(Ha) Galaxies A Search for Metal-Poor Candidates
Physical Description: Book
Language: English
Creator: Pollack, Jennifer E.
Publisher: New College of Florida
Place of Publication: Sarasota, Fla.
Creation Date: 2006
Publication Date: 2006

Subjects

Subjects / Keywords: Star Formation
Galaxies
Galaxy Evaluation
High Resolution Optical Spectroscopy
Oxygen Abundance
Genre: bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract: We present an investigation into the chemical abundances and star formation properties of the central regions in 187 Updated Zwicky Catalog (UZC) galaxies at cz > 5000 km/s. Spectra were obtained for the 187 galaxies with the Center for Astrophysics at Harvard University FAST spectrograph. Four galaxies were selected to have strong bursts of recent star formation and low dust content by constraining the sample to galaxies with EqW(Ha) < -70 and detectable 60 ?m IRAS fluxes. We calculate oxygen abundances for the entire sample using Kewley and Dopita�s (2000) metallicity and ionization parameter diagnostics using the NII, OII, OIII, SII, and the Balmer emission lines. Our results indicate extreme cases where these four intense star-forming systems were shown to have low chemical abundances, which suggests they are in the initial stages of galaxy evolution. Optical images of these galaxies and a few other members revealed irregular systems, many of which seemed to be interacting with nearby companions. Funding for this research was provided by the National Science Foundation Research Experience for Undergraduates program hosted by the Institute for Astronomy at University of Hawaii-Manoa, New College Foundation, New College Alumanae Association, and New College Division of Natural Sciences.
Statement of Responsibility: by Jennifer E. Pollack
Thesis: Thesis (B.A.) -- New College of Florida, 2006
Electronic Access: RESTRICTED TO NCF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE
Bibliography: Includes bibliographical references.
Source of Description: This bibliographic record is available under the Creative Commons CC0 public domain dedication. The New College of Florida, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Local: Faculty Sponsor: Ruppeiner, George

Record Information

Source Institution: New College of Florida
Holding Location: New College of Florida
Rights Management: Applicable rights reserved.
Classification: local - S.T. 2006 P7
System ID: NCFE003685:00001

Permanent Link: http://ncf.sobek.ufl.edu/NCFE003685/00001

Material Information

Title: Star Formation and Metallicity in High EQW(Ha) Galaxies A Search for Metal-Poor Candidates
Physical Description: Book
Language: English
Creator: Pollack, Jennifer E.
Publisher: New College of Florida
Place of Publication: Sarasota, Fla.
Creation Date: 2006
Publication Date: 2006

Subjects

Subjects / Keywords: Star Formation
Galaxies
Galaxy Evaluation
High Resolution Optical Spectroscopy
Oxygen Abundance
Genre: bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract: We present an investigation into the chemical abundances and star formation properties of the central regions in 187 Updated Zwicky Catalog (UZC) galaxies at cz > 5000 km/s. Spectra were obtained for the 187 galaxies with the Center for Astrophysics at Harvard University FAST spectrograph. Four galaxies were selected to have strong bursts of recent star formation and low dust content by constraining the sample to galaxies with EqW(Ha) < -70 and detectable 60 ?m IRAS fluxes. We calculate oxygen abundances for the entire sample using Kewley and Dopita�s (2000) metallicity and ionization parameter diagnostics using the NII, OII, OIII, SII, and the Balmer emission lines. Our results indicate extreme cases where these four intense star-forming systems were shown to have low chemical abundances, which suggests they are in the initial stages of galaxy evolution. Optical images of these galaxies and a few other members revealed irregular systems, many of which seemed to be interacting with nearby companions. Funding for this research was provided by the National Science Foundation Research Experience for Undergraduates program hosted by the Institute for Astronomy at University of Hawaii-Manoa, New College Foundation, New College Alumanae Association, and New College Division of Natural Sciences.
Statement of Responsibility: by Jennifer E. Pollack
Thesis: Thesis (B.A.) -- New College of Florida, 2006
Electronic Access: RESTRICTED TO NCF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE
Bibliography: Includes bibliographical references.
Source of Description: This bibliographic record is available under the Creative Commons CC0 public domain dedication. The New College of Florida, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Local: Faculty Sponsor: Ruppeiner, George

Record Information

Source Institution: New College of Florida
Holding Location: New College of Florida
Rights Management: Applicable rights reserved.
Classification: local - S.T. 2006 P7
System ID: NCFE003685:00001

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