Evolutionary timescale of the pulsating white dwarf G117-B15A : the most stable optical clock known

dc.contributor.author	Kepler, Souza Oliveira	pt_BR
dc.contributor.author	Mukadam, Anjum Shagufta	pt_BR
dc.contributor.author	Winget, Donald Earl	pt_BR
dc.contributor.author	Nather, R. Edward	pt_BR
dc.contributor.author	Metcalfe, Travis S.	pt_BR
dc.contributor.author	Reed, M. D.	pt_BR
dc.contributor.author	Kawaler, Steven D.	pt_BR
dc.contributor.author	Bradley, Paul A.	pt_BR
dc.date.accessioned	2015-01-13T02:14:41Z	pt_BR
dc.date.issued	2000	pt_BR
dc.identifier.issn	0004-637X	pt_BR
dc.identifier.uri	http://hdl.handle.net/10183/108887	pt_BR
dc.description.abstract	We observe G117-B15A, the most precise optical clock known, to measure the rate of change of the main pulsation period of this blue-edge DAV white dwarf. Even though the obtained value is only within 1 σ, P = (2.3±1.4) x 10 -15 s s-ˡ, it is already constraining the evolutionary timescale of this cooling white dwarf star.	en
dc.format.mimetype	application/pdf
dc.language.iso	eng	pt_BR
dc.relation.ispartof	The astrophysical journal. Chicago. Vol. 534, no. 2 pt. 2 (May 2000), p. L185-L188	pt_BR
dc.rights	Open Access	en
dc.subject	Stars: evolution	en
dc.subject	Evolucao estelar	pt_BR
dc.subject	Pulsacoes estelares	pt_BR
dc.subject	Stars: individual (G117-B15A)	en
dc.subject	Stars: oscillations	en
dc.subject	Anãs brancas	pt_BR
dc.subject	Estrelas variaveis	pt_BR
dc.title	Evolutionary timescale of the pulsating white dwarf G117-B15A : the most stable optical clock known	pt_BR
dc.type	Artigo de periódico	pt_BR
dc.identifier.nrb	000274870	pt_BR
dc.type.origin	Estrangeiro	pt_BR

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