Radial stellar pulsation and three-dimensional convection. I. Numerical methods and adiabatic test cases

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dc.creator Deupree, Robert G. (Robert Gaston), 1946-
dc.creator Geroux, Chris M.
dc.date.accessioned 2015-02-13T18:15:16Z
dc.date.available 2015-02-13T18:15:16Z
dc.date.issued 2011-04
dc.identifier.issn 0004-637X
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/25959
dc.description Publisher's version/PDF en_CA
dc.description.abstract We are developing a three-dimensional radiation hydrodynamics code to simulate the interaction of convection and pulsation in classical variable stars. One key goal is the ability to carry these simulations to full amplitude in order to compare them with observed light and velocity curves. Previous two-dimensional calculations were prevented from doing this because of drift in the radial coordinate system, due to the algorithm defining radial movement of the coordinate system during the pulsation cycle. We remove this difficulty by defining our coordinate system flow algorithm to require that the mass in a spherical shell remains constant throughout the pulsation cycle. We perform adiabatic test calculations to show that large amplitude solutions repeat over more than 150 pulsation periods. We also verify that the computational method conserves the peak kinetic energy per period, as must be true for adiabatic pulsation models. en_CA
dc.language.iso en en_CA
dc.publisher American Astronomical Society en_CA
dc.relation.uri http://dx.doi.org/10.1088/0004-637X/731/1/18
dc.rights Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
dc.subject.lcsh RR Lyrae stars
dc.subject.lcsh Variable stars -- Light curves
dc.subject.lcsh Convection (Astrophysics)
dc.subject.lcsh Hydrodynamics -- Mathematical models
dc.title Radial stellar pulsation and three-dimensional convection. I. Numerical methods and adiabatic test cases en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Astrophysical Journal 731(1), 18. (2011) en_CA


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Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
 
Published Version: http://dx.doi.org/10.1088/0004-637X/731/1/18
 
 

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