Pulsational Mapping Of Calcium Across The Surface Of A White Dwarf

dc.contributor.utaustinauthorMontgomery, Michael H.en_US
dc.creatorThompson, Susan E.en_US
dc.creatorMontgomery, Michael H.en_US
dc.creatorvon Hippel, Teden_US
dc.creatorNitta, Atsukoen_US
dc.creatorDalessio, J.en_US
dc.creatorProvencal, J.en_US
dc.creatorStrickland, W.en_US
dc.creatorHoltzman, Jon A.en_US
dc.creatorMukadam, Anjumen_US
dc.creatorSullivan, D.en_US
dc.creatorNagel, T.en_US
dc.creatorKoziel-Wierzbowska, D.en_US
dc.creatorKundera, T.en_US
dc.creatorZola, S.en_US
dc.creatorWiniarski, M.en_US
dc.creatorDrozdz, M.en_US
dc.creatorKuligowska, E.en_US
dc.creatorOgloza, W.en_US
dc.creatorBognar, Z.en_US
dc.creatorHandler, G.en_US
dc.creatorKanaan, A.en_US
dc.creatorRibeira, T.en_US
dc.creatorRosen, R.en_US
dc.creatorReichart, D.en_US
dc.creatorHaislip, J.en_US
dc.creatorBarlow, B. N.en_US
dc.creatorDunlap, B. H.en_US
dc.creatorIvarsen, K.en_US
dc.creatorLaCluyze, A.en_US
dc.creatorMullally, Fergalen_US
dc.date.accessioned2016-04-28T19:33:13Z
dc.date.available2016-04-28T19:33:13Z
dc.date.issued2010-05en
dc.description.abstractWe constrain the distribution of calcium across the surface of the white dwarf star G29-38 by combining time-series spectroscopy from Gemini-North with global time-series photometry from the Whole Earth Telescope. G29-38 is actively accreting metals from a known debris disk. Since the metals sink significantly faster than they mix across the surface, any inhomogeneity in the accretion process will appear as an inhomogeneity of the metals on the surface of the star. We measure the flux amplitudes and the calcium equivalent width amplitudes for two large pulsations excited on G29-38 in 2008. The ratio of these amplitudes best fits a model for polar accretion of calcium and rules out equatorial accretion.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipCrystal Trusten_US
dc.description.sponsorshipNational Science Foundation AST 06-07480, AST-0909107en_US
dc.identifierdoi:10.15781/T2RN6Q
dc.identifier.Filename2010_05_pulsationalmapping.pdfen_US
dc.identifier.citationThompson, Susan E., M. H. Montgomery, T. von Hippel, A. Nitta, J. Dalessio, J. Provencal, W. Strickland et al. "Pulsational Mapping of Calcium Across the Surface of a White Dwarf." The Astrophysical Journal, Vol. 714, No. 1 (May., 2010): 296.en_US
dc.identifier.doi10.1088/0004-637x/714/1/296en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34720
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_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.subjectstars: individual (g29-38)en_US
dc.subjectstars:en_US
dc.subjectoscillationsen_US
dc.subjectwhite dwarfsen_US
dc.subjectzz ceti starsen_US
dc.subjectwhole earth telescopeen_US
dc.subjectoscillating ap starsen_US
dc.subjectmode-identificationen_US
dc.subjectgravity modesen_US
dc.subjectg29-38en_US
dc.subjectspectroscopyen_US
dc.subjectaccretionen_US
dc.subjectmetalsen_US
dc.subjectasteroseismologyen_US
dc.subjectastronomy & astrophysicsen_US
dc.titlePulsational Mapping Of Calcium Across The Surface Of A White Dwarfen_US
dc.typeArticleen_US

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