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  4. Galaxy evolution with hybrid methods
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Galaxy evolution with hybrid methods

Full metadata

Description

I combine, compare, and contrast the results from two different numerical techniques (grid vs. particle methods) studying multi-scale processes in galaxy and structure formation. I produce a method for recreating identical initial conditions for one method from those of the other, and explore methodologies necessary for making these two methods as consistent as possible. With this, I first study the impact of streaming velocities of baryons with respect to dark matter, present at the epoch of reionization, on the ability for small halos to accrete gas at high redshift. With the inclusion of this stream velocity, I find the central density profile of halos is reduced, overall gas condensation is delayed, and infer a delay in the inevitable creation of stars.

I then combine the two numerical methods to study starburst outflows as they interact with satellite halos. This process leads to shocks catalyzing the formation of molecular coolants that lead to bursts in star formation, a process that is better captured in grid methods. The resultant clumps of stars are removed from their initial dark matter halo, resemble precursors to modern-day globular clusters, and their formation may be observable with upcoming telescopes.

Finally, I perform two simulation suites, comparing each numerical method's ability to model the impact of energetic feedback from accreting black holes at the core of giant clusters. With these comparisons I show that black hole feedback can maintain a hot diffuse medium while limiting the amount of gas that can condense into the interstellar medium, reducing the central star formation by up to an order of magnitude.

Date Created
2014
Contributors
  • Richardson, Mark Lawrence Albert (Author)
  • Scannapieco, Evan (Thesis advisor)
  • Rhoads, James (Committee member)
  • Scowen, Paul (Committee member)
  • Timmes, Frank (Committee member)
  • Young, Patrick (Committee member)
  • Arizona State University (Publisher)
Topical Subject
  • Astrophysics
  • Astrophysics
  • Cosmology
  • Evolution
  • galaxy
  • Hydrodynamics
  • Numerical
  • Galaxies--Evolution--Mathematical models.
  • Galaxies
Resource Type
Text
Genre
Doctoral Dissertation
Academic theses
Extent
xxii, 162 p. : ill. (some col.)
Language
eng
Copyright Statement
In Copyright
Reuse Permissions
All Rights Reserved
Primary Member of
ASU Electronic Theses and Dissertations
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.25929
Statement of Responsibility
by Mark Lawrence Albert Richardson
Description Source
Retrieved on Dec. 16, 2014
Level of coding
full
Note
Partial requirement for: Ph.D., Arizona State University, 2014
Note type
thesis
Includes bibliographical references (p. 153-162)
Note type
bibliography
Field of study: Astrophysics
System Created
  • 2014-10-01 05:07:52
System Modified
  • 2021-08-30 01:32:47
  •     
  • 1 year 6 months ago
Additional Formats
  • OAI Dublin Core
  • MODS XML

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