The ZZ Ceti red edge
dc.contributor.author | Kanaan Neto, Antonio Nemer | pt_BR |
dc.contributor.author | Kepler, Souza Oliveira | pt_BR |
dc.contributor.author | Winget, Donald Earl | pt_BR |
dc.date.accessioned | 2014-07-24T02:04:24Z | pt_BR |
dc.date.issued | 2002 | pt_BR |
dc.identifier.issn | 0004-6361 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/98517 | pt_BR |
dc.description.abstract | With a time-series CCD photometric survey, we have demonstrated clearly that the observed red edge for the ZZ Ceti stars instability strip at 11 000 K is real, with the pulsation amplitude decreasing at least by a factor of 50. Previous surveys for variability among hydrogen atmosphere white dwarfs around 11 000 K have been carried out using time-series photoelectric photometry, not di erential photometry, insensitive for small amplitude periodicities of 15 min and longer. In our survey we constantly monitor the sky brightness as well as one or more comparison stars through the same color lter, reducing the adverse e ects of di erential extinction and sky fluctuations, obtaining true di erential photometry. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Astronomy and astrophysics. Les Ulis. Vol. 389, no. 3 (July 2002), p. 896-903 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Stars: oscillations | en |
dc.subject | Fotometria estelar | pt_BR |
dc.subject | Estrelas variaveis | pt_BR |
dc.subject | Stars: white dwarfs | en |
dc.subject | Anãs brancas | pt_BR |
dc.title | The ZZ Ceti red edge | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000327197 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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