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Constraints on Quasar Geometry from ...

Moraczewski, Leo.

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Constraints on Quasar Geometry from Sloan Digital Sky Survey.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Constraints on Quasar Geometry from Sloan Digital Sky Survey./
作者:	Moraczewski, Leo.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	54 p.
附註:	Source: Masters Abstracts International, Volume: 82-05.
Contained By:	Masters Abstracts International82-05.
標題:	Physics. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28151253
ISBN:	9798684602610

Constraints on Quasar Geometry from Sloan Digital Sky Survey.
Moraczewski, Leo.

Constraints on Quasar Geometry from Sloan Digital Sky Survey. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 54 p.

Source: Masters Abstracts International, Volume: 82-05.

Thesis (M.S.)--Creighton University, 2020.

This item must not be sold to any third party vendors.

Current quasar models assume a super massive black hole in the center of the quasar, with an accretion disk surrounding it. The accretion disk is believed to be a rapidly rotating, geometrically thin but optically thick disk. The orientation of the accretion disk is predicted to have a significant effect on the observed spectral emission features of quasars. Results are presented which test that model based on a study of the rest frame UV and optical spectra using the data in the Sloan Digital Sky Survey quasar spectral database, Data Release 12. Using the [OIII]λ5007 emission line equivalent width as a measure of the disk inclination angle, various emission line and continuum features in different parts of the spectrum are tested. This could provide insight into out flowing winds and the overall geometry of the broad line region. The results suggest a correlation between the orientation of the accretion disk and the orientation of the broadline region.

ISBN: 9798684602610Subjects--Topical Terms:

516296
Physics.
Subjects--Index Terms:

Accretion disk

Constraints on Quasar Geometry from Sloan Digital Sky Survey.
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500 $a Source: Masters Abstracts International, Volume: 82-05.
500 $a Advisor: Baruth, Andrew.
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506 $a This item must not be sold to any third party vendors.
520 $a Current quasar models assume a super massive black hole in the center of the quasar, with an accretion disk surrounding it. The accretion disk is believed to be a rapidly rotating, geometrically thin but optically thick disk. The orientation of the accretion disk is predicted to have a significant effect on the observed spectral emission features of quasars. Results are presented which test that model based on a study of the rest frame UV and optical spectra using the data in the Sloan Digital Sky Survey quasar spectral database, Data Release 12. Using the [OIII]λ5007 emission line equivalent width as a measure of the disk inclination angle, various emission line and continuum features in different parts of the spectrum are tested. This could provide insight into out flowing winds and the overall geometry of the broad line region. The results suggest a correlation between the orientation of the accretion disk and the orientation of the broadline region.
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653 $a Optical spectra
653 $a Quasar
653 $a Spectral emission
653 $a Supermassive black hole
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