Dynamics and Observational Appearance of Circumstellar Disks
| dc.creator | Nelson, Andrew F. | |
| dc.date | 1999-08-15 | |
| dc.date.accessioned | 2026-07-07T02:32:50Z | |
| dc.date.available | 2026-07-07T02:32:50Z | |
| dc.description | In my thesis I present a study of the dynamics and observational characteristics of massive circumstellar disks in two dimensions ($r$, $ϕ$) using two complimentary hydrodynamic codes: a `Smoothed Particle Hydrodynamic' (SPH) code and a `Piecewise Parabolic Method' (PPM) code. I also study the detection limits available to radial velocity searches for low mass companions to main sequence stars. The thesis is organized as a series of published or submitted papers, connected by introductory and concluding material and is archived `for posterity'. I recommend that readers of this abstract obtain the published versions of each of these papers. I first outline the progress which has been made in the modeling of the structure and origins of the solar system, then in chapter 2 (ApJ 502,p342) I proceed with numerical simulations of circumstellar disks using both hydrodynamic codes assuming a `locally isothermal' equation of state. In chapter 4 (ApJ submitted) I relax the locally isothermal evolution assumption and instead include simple heating and cooling prescriptions for the system. In chapter 6 (ApJ 500,p940) I examine the limits which may be placed upon the detection of planets, brown dwarfs and low mass stellar companions using radial velocity measurements. In chapter 7, I outline several problems which may be profitably addressed by building on this work. | |
| dc.description | PhD thesis. 172pg (single space 10pt) incl 56 numbered figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9908158 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9908158 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14602 | |
| dc.subject | Astrophysics | |
| dc.title | Dynamics and Observational Appearance of Circumstellar Disks | |
| dc.type | text |