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dc.contributor.authorKurtz, Donald W.pt_BR
dc.contributor.authorKawaler, Steven D.pt_BR
dc.contributor.authorRiddle, Reed L.pt_BR
dc.contributor.authorReed, M. D.pt_BR
dc.contributor.authorCunha, Margarida S.pt_BR
dc.contributor.authorWood, Matthew A.pt_BR
dc.contributor.authorSilvestri, Nicole M.pt_BR
dc.contributor.authorWatson, Todd K.pt_BR
dc.contributor.authorDolez, Noëlpt_BR
dc.contributor.authorMoskalik, Pawelpt_BR
dc.contributor.authorZola, Staszekpt_BR
dc.contributor.authorPallier, E.pt_BR
dc.contributor.authorGuzik, Joyce Annpt_BR
dc.contributor.authorMetcalfe, Travis S.pt_BR
dc.contributor.authorMukadam, Anjum Shaguftapt_BR
dc.contributor.authorNather, R. Edwardpt_BR
dc.contributor.authorWinget, Donald Earlpt_BR
dc.contributor.authorSullivan, Denis J.pt_BR
dc.contributor.authorSullivan, Terrypt_BR
dc.contributor.authorSekiguchi, Kazuhiropt_BR
dc.contributor.authorJiang, Xiaojunpt_BR
dc.contributor.authorShobbrook, Robert R.pt_BR
dc.contributor.authorAshoka, B.N.pt_BR
dc.contributor.authorSeetha, S.pt_BR
dc.contributor.authorJoshi, Santoshpt_BR
dc.contributor.authorO'Donoghue, Darraghpt_BR
dc.contributor.authorHandler, Geraldpt_BR
dc.contributor.authorMueller, M.pt_BR
dc.contributor.authorGonzalez Perez, Jose Miguelpt_BR
dc.contributor.authorSolheim, Jan-Ericpt_BR
dc.contributor.authorJohannessen, F.pt_BR
dc.contributor.authorUlla, Anapt_BR
dc.contributor.authorKepler, Souza Oliveirapt_BR
dc.contributor.authorKanaan Neto, Antonio Nemerpt_BR
dc.contributor.authorCosta, Alex Fabiano Murillo dapt_BR
dc.contributor.authorFraga, Lucianopt_BR
dc.contributor.authorGiovannini Junior, Odilonpt_BR
dc.contributor.authorMatthews, Jaymie M.pt_BR
dc.contributor.authorWET collaborationpt_BR
dc.date.accessioned2014-03-29T01:51:50Zpt_BR
dc.date.issued2002pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/89995pt_BR
dc.description.abstractHR1217 is a prototypical rapidly oscillating Ap star that has presented a test to the theory of non-radial stellar pulsation. Prior observations showed a clear pattern of five modes with alternating frequency spacings of 33.3 and 34.6 μmHz, with a sixth mode at a problematic spacing of 50.0 μHz (which equals 1.5 x 33.3 μHz†) to the high-frequency side. Asymptotic pulsation theory allowed for a frequency spacing of 34 μHz, but Hipparcos observations rule out such a spacing. Theoretical calculations of magnetoacoustic modes in Ap stars by Cunha predicted that there should be a previously undetected mode 34 μHz higher than the main group, with a smaller spacing between it and the highest one. In this Letter, we present preliminary results from a multisite photometric campaign on the rapidly oscillating Ap star HR1217 using the ‘Whole Earth Telescope’. While a complete analysis of the data will appear in a later paper, one outstanding result from this run is the discovery of a newly detected frequency in the pulsation spectrum of this star, at the frequency predicted by Cunha.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Society. Oxford. Vol. 330, no. 3 (Mar. 2002), p. L57-L61pt_BR
dc.rightsOpen Accessen
dc.subjectStars: individual: HR1217en
dc.subjectEstrelas magneticaspt_BR
dc.subjectFotometria estelarpt_BR
dc.subjectStars: magnetic fieldsen
dc.subjectPulsacoes estelarespt_BR
dc.subjectStars: oscillationsen
dc.subjectStars: variables: otheren
dc.subjectEstrelas variaveispt_BR
dc.titleDiscovery of the 'missing' mode in HR 1217 by the Whole Earth Telescopept_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000312245pt_BR
dc.type.originEstrangeiropt_BR


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