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Circumstellar disk structure and evo...

Hughes, Alanna Meredith.

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Circumstellar disk structure and evolution through resolved submillimeter observations.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Circumstellar disk structure and evolution through resolved submillimeter observations./
Author:	Hughes, Alanna Meredith.
Description:	294 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4294.
Contained By:	Dissertation Abstracts International71-07B.
Subject:	Physics, Astrophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3414764
ISBN:	9781124079639

Circumstellar disk structure and evolution through resolved submillimeter observations.
Hughes, Alanna Meredith.

Circumstellar disk structure and evolution through resolved submillimeter observations. - 294 p.

Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4294.

Thesis (Ph.D.)--Harvard University, 2010.

Circumstellar disks provide the reservoirs of raw material and determine conditions for the formation of nascent planetary systems. This thesis presents observations from millimeter-wavelength interferometers, particularly the Submillimeter Array, that address the following outstanding problems in the study of protoplanetary disks: (1) constraining the physical mechanisms driving the viscous transport of material through the disk, and (2) carrying out detailed studies of "transitional" objects between the gas-rich protoplanetary and tenuous, dusty debris disk phases to better understand how gas and dust are cleared from the system. We study accretion processes in three complementary ways: using spatially resolved observations of molecular gas lines at high spectral resolution to determine the magnitude and spatial distribution of turbulence in the disk; using polarimetry to constrain the magnetic properties of the outer disk in order to evaluate whether the MRI is a plausible origin for this turbulence and investigating the gas and dust distribution at the outer disk edge in the context of self-similar models of accretion disk structure and evolution. The studies of transition disks use spatially resolved observations to study the detailed structure of the gas and dust in systems that are currently in the process of clearing material. We obtain snapshots of the inside-out clearing of gas and dust in several systems, and compare our observations with the theoretical predictions generated for different disk clearing mechanisms. Our observations are generally consistent with the characteristics predicted for viscous transport driven by the magnetorotational instability and disk clearing accomplished through the dual action of giant planet formation and photoevaporation by energetic radiation from the star.

ISBN: 9781124079639Subjects--Topical Terms:

1671120
Physics, Astrophysics.

Circumstellar disk structure and evolution through resolved submillimeter observations.
LDR:02729nam 2200277 4500 001 1404556
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020 $a 9781124079639
035 $a (UMI)AAI3414764
035 $a AAI3414764
040 $a UMI $c UMI
100 1 $a Hughes, Alanna Meredith. $3 1683887
245 1 0 $a Circumstellar disk structure and evolution through resolved submillimeter observations.
300 $a 294 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4294.
500 $a Adviser: David J. Wilner.
502 $a Thesis (Ph.D.)--Harvard University, 2010.
520 $a Circumstellar disks provide the reservoirs of raw material and determine conditions for the formation of nascent planetary systems. This thesis presents observations from millimeter-wavelength interferometers, particularly the Submillimeter Array, that address the following outstanding problems in the study of protoplanetary disks: (1) constraining the physical mechanisms driving the viscous transport of material through the disk, and (2) carrying out detailed studies of "transitional" objects between the gas-rich protoplanetary and tenuous, dusty debris disk phases to better understand how gas and dust are cleared from the system. We study accretion processes in three complementary ways: using spatially resolved observations of molecular gas lines at high spectral resolution to determine the magnitude and spatial distribution of turbulence in the disk; using polarimetry to constrain the magnetic properties of the outer disk in order to evaluate whether the MRI is a plausible origin for this turbulence and investigating the gas and dust distribution at the outer disk edge in the context of self-similar models of accretion disk structure and evolution. The studies of transition disks use spatially resolved observations to study the detailed structure of the gas and dust in systems that are currently in the process of clearing material. We obtain snapshots of the inside-out clearing of gas and dust in several systems, and compare our observations with the theoretical predictions generated for different disk clearing mechanisms. Our observations are generally consistent with the characteristics predicted for viscous transport driven by the magnetorotational instability and disk clearing accomplished through the dual action of giant planet formation and photoevaporation by energetic radiation from the star.
590 $a School code: 0084.
650 4 $a Physics, Astrophysics. $3 1671120
650 4 $a Physics, Astronomy and Astrophysics. $3 1019521
690 $a 0596
690 $a 0606
710 2 $a Harvard University. $3 528741
773 0 $t Dissertation Abstracts International $g 71-07B.
790 1 0 $a Wilner, David J., $e advisor
790 $a 0084
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3414764