The search for diffuse interstellar bands in quasar absorption line systems

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dc.contributor.authorYork, Brian A.
dc.contributor.supervisorEllison, Sara L.
dc.date.accessioned2008-08-15T16:01:00Z
dc.date.available2008-08-15T16:01:00Z
dc.date.copyright2008en_US
dc.date.issued2008-08-15T16:01:00Z
dc.degree.departmentDepartment of Physics and Astronomy
dc.degree.levelMaster of Science M.Sc.en_US
dc.description.abstractThe diffuse interstellar bands (DIBs) probably arise from complex organic molecules whose strength in local galaxies correlates with neutral hydrogen column density, N(H I), and dust reddening, E(B−V). Because Damped Lyman-α systems are known to have high N(H I), and Ca II absorbers in quasar (QSO) spectra are posited to have high N(H I) and reddening, both represent promising sites for the detection of DIBs at cosmological distances. I present the results of a search for diffuse bands in seven DLAs and nine Ca II absorbers. I announce the detection of the first narrow DIBs at z>0 towards one DLA and one Ca II system. I further investigate the relative strengths of the DIBs as well as their correlations with N(H I) and E(B−V). Finally, I discuss the prospects for using DIBs to better understand the properties of quasar absorption systems, and for using DIB searches in absorption systems to better understand the properties of DIBs.en_US
dc.identifier.bibliographicCitationYork, B. A., Ellison, S. L., Lawton, B., Churchill, C., Snow, T. P., Johnson, R. A., & Ryan, S. G. (2006). ApJ, 647, L29-L32en_US
dc.identifier.bibliographicCitationEllison, S. L., York, B. A., Murphy, M. T., Zych, B. J., Smith, A. M., & Sarre, P. J. (2008). MNRAS, 383, L30-L34en_US
dc.identifier.bibliographicCitationLawton, B., Churchill, C., York, B. A., Ellison, S. L., Snow, T. P., Johnson, R. A., Ryan, S. G., & Benn, C. R. (2008). AJ, 136, 94-112en_US
dc.identifier.urihttp://hdl.handle.net/1828/1074
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectISM: Lines and bandsen_US
dc.subjectISM: Moleculesen_US
dc.subjectQuasars: Absorption Linesen_US
dc.subjectQuasars: Absorption Lines: DLAsen_US
dc.subjectQuasars: Absorption Lines: Ca II Systemsen_US
dc.subjectQuasars: Individual (J0013–0024)en_US
dc.subjectQuasars: Individual (AO 0235+164)en_US
dc.subject.lcshUVic Subject Index::Sciences and Engineering::Physics::Astronomyen_US
dc.titleThe search for diffuse interstellar bands in quasar absorption line systemsen_US
dc.typeThesisen_US

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