ON THE DIFFICULTY OF DETERMINING THE COLOR-TERM IN THE CEPHEID PLC RELATION

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dc.contributor.authorFOUQUE, P
dc.contributor.authorGIEREN, WP
dc.date.accessioned2025-01-23T19:21:42Z
dc.date.available2025-01-23T19:21:42Z
dc.date.issued1993
dc.description.abstractWe present here a new tentative to determine the color-term of the Cepheid period - luminosity - color relation, using a large sample of 100 galactic Cepheids, whose distances are known from the visual surface brightness method (approximately 10% accuracy). The derived coefficient seems lower (between 0 and 1) than both its observed value in the Magellanic Clouds (about 2.1) and the semi-theoretical value of about 3.4. Systematic effects due to metallicity are investigated, and discarded as a possible explanation of the discrepancy. Statistical effects are reviewed, and a formalism useful to other topics is presented. Statistical corrections remove only part of the discrepancy we find. We therefore still recommend not to use the PLC relation to determine extragalactic distances, but to prefer a simple PL relation, as long as the question of the PLC color-term is not clearly resolved.
dc.fuente.origenWOS
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/98846
dc.identifier.wosidWOS:A1993LR48800024
dc.issue.numero1
dc.language.isoen
dc.pagina.final218
dc.pagina.inicio213
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectCEPHEIDS
dc.titleON THE DIFFICULTY OF DETERMINING THE COLOR-TERM IN THE CEPHEID PLC RELATION
dc.typeartículo
dc.volumen275
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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