Doctoral Dissertations

Abstract

"The dynamical state of the young star-forming cluster Rho Ophiuchi is considered, with emphasis on the L1688 cloud. Radial velocities are derived for 32 YSOs, with some being multi-epoch, using Markov-Chain Monte Carlo routines based upon the package emcee. Sources are chosen based upon their spectral index to focus on the earlier stages of star formation, in this case, Class I and Flat spectrum objects, and compared with a sample of Class II and III objects from the same embedded cluster. It is found that the radial velocity dispersion for these younger objects is Δv = 2.8 ± 0:6 km s-1 which is about 2σ higher than the dispersion for Class II and III objects. The implication is that there are either small number statistics at play, or the cluster's dispersion is being increased as an inverse function of the distance from the center of the cluster due to a collapse-and-rebound phase that has been proposed in recent simulations"--Abstract, page iii.

Advisor(s)

Wilking, Bruce A.
Parris, Paul Ernest, 1954-

Committee Member(s)

Greene, Tom P.
Gibb, Erika L.
Yamilov, Alexey

Department(s)

Physics

Degree Name

Ph. D. in Physics

Comments

A dissertation presented to the Graduate Faculty of the Missouri University of Science and Technology and University of Missouri--St. Louis in partial fulfillment of the requirements for the degree Doctor of Philosophy in Physics

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2019

Pagination

x, 222 pages

Note about bibliography

Includes bibliographic references (pages 212-221).

Rights

© 2019 Timothy Sullivan, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 11553

Electronic OCLC #

1105154786

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