Constraining the Surface Inhomogeneity and Settling Times of Metals on Accreting White Dwarfs

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dc.contributor.utaustinauthorMontgomery, M. H.en_US
dc.contributor.utaustinauthorvon Hippel, T.en_US
dc.creatorMontgomery, M. H.en_US
dc.creatorThompson, S. E.en_US
dc.creatorvon Hippel, Teden_US
dc.date.accessioned2016-10-28T19:37:19Z
dc.date.available2016-10-28T19:37:19Z
dc.date.issued2008-10en_US
dc.description.abstractDue to the short settling times of metals in DA white dwarf atmospheres, any white dwarfs with photospheric metals must be actively accreting. It is therefore natural to expect that the metals may not be deposited uniformly on the surface of the star. We present calculations showing how the temperature variations associated with white dwarf pulsations lead to an observable diagnostic of the surface metal distribution, and we show what constraints current data sets are able to provide. We also investigate the effect that time-variable accretion has on the metal abundances of different species, and we show how this can lead to constraints on the gravitational settling times.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNational Science Foundation AST-0507639, AST-0607480en_US
dc.description.sponsorshipDelaware Asteroseismic Research Centeren_US
dc.identifierdoi:10.15781/T24M91D2P
dc.identifier.citationMontgomery, M. H., S. E. Thompson, and T. von Hippel. "Constraining the Surface Inhomogeneity and Settling Times of Metals on Accreting White Dwarfs." The Astrophysical Journal Letters, Vol. 685, No. 2 (Oct., 2008): L133.en_US
dc.identifier.doi10.1086/592731en_US
dc.identifier.issnen_US
dc.identifier.urihttp://hdl.handle.net/2152/43059
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journal Lettersen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectaccretion, accretion disksen_US
dc.subjectconvectionen_US
dc.subjectdiffusionen_US
dc.subjectstars: oscillationsen_US
dc.subjectstars: variables: otheren_US
dc.subjectwhite dwarfsen_US
dc.subjectresolved spectroscopyen_US
dc.subjectdusty disken_US
dc.subjectg29-38en_US
dc.subjectstarsen_US
dc.subjectgd-362en_US
dc.subjectasteroseismologyen_US
dc.subjectdiscoveryen_US
dc.subjectlinesen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleConstraining the Surface Inhomogeneity and Settling Times of Metals on Accreting White Dwarfsen_US
dc.typeArticleen_US

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