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Measuring mass

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TypeOfResource
Text
TitleInfo (ID = T-1)
Title
Measuring mass
SubTitle
non-circular motions of gas in disk galaxies and radial velocities of stars in a global cluster
TitleInfo (ID = T-2); (type = alternative)
Title
Non-circular motions of gas in disk galaxies and radial velocities of stars in a global cluster
Identifier (displayLabel = ); (invalid = )
ETD_2115
Identifier (type = hdl)
http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051901
Language (objectPart = )
LanguageTerm (authority = ISO639-2); (type = code)
eng
Genre (authority = marcgt)
theses
Subject (ID = SBJ-1); (authority = RUETD)
Topic
Physics and Astronomy
Subject (ID = SBJ-2); (authority = ETD-LCSH)
Topic
Disks (Astrophysics)
Subject (ID = SBJ-3); (authority = ETD-LCSH)
Topic
Galaxies
Subject (ID = SBJ-4); (authority = ETD-LCSH)
Topic
Stars--Global clusters
Abstract
This thesis is concerned with the motions of gas in disk galaxies and with the motions of stars in a globular cluster to learn about their mass content.
First we study non-circular streaming motions of HI gas in five representative disk galaxies with a bisymmetric model. We show that this physically motivated method can represent a wide range of bar-like distortions and that its model parameters can be related to useful physical parameters of galaxies like the amplitude of the forced non-circular speed, the bar angle, and the halo ellipticity.
We also model the non-circular gas flow in the strongly barred galaxy NGC~1365. The gravitational potential is based on new observations that include photometric imaging, Fabry-Perot emission line imaging spectroscopy and a detailed re-analysis of archival HI data from the VLA. We use our 2-dimensional velocity map to constrain the strength and positions of the shocks in hydrodynamical simulations and find that better agreement is found with a massive, but not fully maximal disk $(m{M/L}simeq 2.0pm 1.0)$ and a fast bar (corotation at 1.2$m{R_{bar}}$). The analysis was complicated by the discovery of an asymmetric distribution of dust and kinematics in the bar region despite the remarkably bisymmetric distribution of the I-band light.
We have measured 543 radial velocities of stars in the direction of the Galactic globular cluster M80 with Fabry-Perot absorption-line imaging spectroscopy. The data is used to derive the total mean velocity of $7.39 pm 0.54$ kms, the total velocity dispersion of $10.1 pm 0.4$ kms, a declining dispersion profile, and the rotation of the cluster. M80 is rotating with an amplitude of $2.42 pm 0.81$ kms along an axis with a position angle of $246.1degr pm 17.1$ (measured from North through East), which is perpendicular to the major axis of the cluster flattening. We have fitted single- and multi-mass Michie-King models to our velocity data and to surface-brightness profiles taken from the literature.
Only when we increase the expected present-day number of white dwarfs are we able to match the expected $M/L_V$ of the stellar population with the
dynamically-derived value of $3.0pm0.3$. We tentatively interpret this as evidence of tidal stripping given that M80 is on an orbit that keeps it in the inner regions of the Galaxy and therefore has probably experienced significant tidal mass loss.
PhysicalDescription
Form (authority = gmd)
electronic resource
Extent
xv, 127 p. : ill.
InternetMediaType
application/pdf
InternetMediaType
text/xml
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Ricardo Zánmar Sánchez
Name (ID = NAME-1); (type = personal)
NamePart (type = family)
Sánchez
NamePart (type = given)
Ricardo Zánmar
NamePart (type = date)
1978-
Role
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author
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Ricardo Zánmar Sánchez
Name (ID = NAME-2); (type = personal)
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Sellwood
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Jerry
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chair
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Advisory Committee
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Jerry Sellwood
Name (ID = NAME-3); (type = personal)
NamePart (type = family)
Zamick
NamePart (type = given)
Larry
Role
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internal member
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Advisory Committee
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Larry Zamick
Name (ID = NAME-4); (type = personal)
NamePart (type = family)
Keeton
NamePart (type = given)
Charles
Role
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internal member
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Advisory Committee
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Charles R Keeton
Name (ID = NAME-5); (type = personal)
NamePart (type = family)
Hughes
NamePart (type = given)
John
Role
RoleTerm (authority = RULIB); (type = )
internal member
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Advisory Committee
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John P Hughes
Name (ID = NAME-6); (type = personal)
NamePart (type = family)
Spekkens
NamePart (type = given)
Kristine
Role
RoleTerm (authority = RULIB); (type = )
outside member
Affiliation
Advisory Committee
DisplayForm
Kristine Spekkens
Name (ID = NAME-1); (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB); (type = )
degree grantor
Name (ID = NAME-2); (type = corporate)
NamePart
Graduate School - New Brunswick
Role
RoleTerm (authority = RULIB); (type = )
school
OriginInfo
DateCreated (point = ); (qualifier = exact)
2009
DateOther (qualifier = exact); (type = degree)
2009-10
Place
PlaceTerm (type = code)
xx
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T300028H
Genre (authority = ExL-Esploro)
ETD doctoral
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Rights

RightsDeclaration (AUTHORITY = GS); (ID = rulibRdec0006)
The author owns the copyright to this work
Copyright
Status
Copyright protected
Notice
Note
Availability
Status
Open
Reason
Permission or license
Note
RightsHolder (ID = PRH-1); (type = personal)
Name
FamilyName
Sánchez
GivenName
Ricardo
Role
Copyright holder
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Type
Permission or license
Label
Place
DateTime
Detail
AssociatedEntity (ID = AE-1); (AUTHORITY = rulib)
Role
Copyright holder
Name
Ricardo Sánchez
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject (ID = AO-1); (AUTHORITY = rulib)
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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Technical

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ETD
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application/pdf
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application/x-tar
FileSize (UNIT = bytes)
3645440
Checksum (METHOD = SHA1)
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