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High altitude star formation and the superbubble connection

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thesis
posted on 28.03.2022, 11:43 authored by Gurvarinder
The thesis is a case study of “Carina Flare” (GSH 287+04–17) – a supershell with significant quantities of associated molecular gas. Since prior studies of the supershell provide substantial evidence of the Galactic Plane blowout, with the highest associated molecular cloud detected ~ 400 pc above the Galactic midplane, it serves as a perfect candidate to investigate the extent of star formation in a small sample of high-altitude clouds. We probe the selected molecular clouds lining the walls of this superstructure using the carbon monosulfide (J = 1 > 0) rotational transition as a tracer of dense gas clumps. Virial analysis of the detected dense clumps tentatively suggests that most of them maybe gravitationally bound and possess a significant potential to collapse to stellar cores. We use the classification scheme for young stellar objects (YSOs) devised by Koenig et al. (2014) combining WISE and 2MASS near and mid-infrared colors and magnitudes to locate YSOs associated with the molecular clouds and investigate their distribution with respect to CS clumps. The close association between the dense gas and YSOs provides substantial evidence in support of on-going star formation activity in the Carina Flare molecular clouds.

History

Table of Contents

1. Introduction -- 2. Data -- 3. Identification of young stellar objects -- 4. Analysis of CS data -- 5. Discussion and interpretation -- 6. Conclusions and future work -- References.

Notes

Bibliography: pages 48-54 Empirical thesis.

Awarding Institution

Macquarie University

Degree Type

Thesis MRes

Degree

MRes, Macquarie University, Faculty of Science and Engineering, Department of Physics and Astronomy

Department, Centre or School

Department of Physics and Astronomy

Year of Award

2018

Principal Supervisor

Joanne Dawson

Additional Supervisor 1

Cormac Purcell

Rights

Copyright Gurvarinder 2018. Copyright disclaimer: http://mq.edu.au/library/copyright

Language

English

Extent

1 online resource (ix, 54 pages) colour illustrations

Former Identifiers

mq:70908 http://hdl.handle.net/1959.14/1268914