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dc.contributor.authorDemers, Sergept_BR
dc.contributor.authorWesemael, F.pt_BR
dc.contributor.authorIrwin, Michael Johnpt_BR
dc.contributor.authorFontaine, Gillespt_BR
dc.contributor.authorKepler, Souza Oliveirapt_BR
dc.contributor.authorLamontagne, R.pt_BR
dc.contributor.authorHolberg, J.B.pt_BR
dc.date.accessioned2014-12-31T02:10:47Zpt_BR
dc.date.issued1990pt_BR
dc.identifier.issn0004-637Xpt_BR
dc.identifier.urihttp://hdl.handle.net/10183/108714pt_BR
dc.description.abstractWe report the discovery, in the course of a survey for high-latitude, ultraviolet-excess objects in the southern hemisphere, of a new white dwarf star belonging to the PG 1159 spectroscopic class. A variety of spectroscopic observations show this object to be similar to the prototype PG 1159-035 in exhibiting He u, C IV, and O VI features in its optical spectrum, as well as a rich absorption spectrum in the ultraviolet. In addition, the slope of its energy distribution appears as steep as that of PG 1159-035 and is consistent with the Rayleigh-Jeans tail of a very hot ('I;, 100,000 K) star. White-light, high-speed photometry reveals that this object does not exhibit periodic variations in the range 10-2000 s with semiamplitudes larger than 0.002 mag. The importance of such objects for current models of the spectral evolution of white dwarfs is emphasized.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofThe astrophysical journal. Chicago. Vol. 351, no. 1, pt. 1 (Mar. 1990), p. 271-276pt_BR
dc.rightsOpen Accessen
dc.subjectAnãs brancaspt_BR
dc.subjectStars: individual (MCT 0130-1937)en
dc.subjectObservações astronômicas no visívelpt_BR
dc.subjectStars: white dwarfsen
dc.subjectUltraviolet : spectraen
dc.subjectEspectros estelarespt_BR
dc.subjectFotometria estelarpt_BR
dc.titleHot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 objectpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000015328pt_BR
dc.type.originEstrangeiropt_BR


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