dc.creatorRomero, Alejandra Daniela
dc.creatorCórsico, Alejandro Hugo
dc.creatorAlthaus, Leandro Gabriel
dc.creatorGarcía Berro, Enrique
dc.date2009
dc.date2022-06-30T16:00:23Z
dc.date.accessioned2023-07-15T04:42:49Z
dc.date.available2023-07-15T04:42:49Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/138655
dc.identifierissn:1743-9213
dc.identifierissn:1743-9221
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7470601
dc.descriptionHot DQ white dwarfs constitute a new class of white dwarf stars, uncovered recently within the framework of SDSS project. There exist nine of them, out of a total of several thousands white dwarfs spectroscopically identified. Recently, three hot DQ white dwarfs have been reported to exhibit photometric variability with periods compatible with pulsation g -modes. In this contribution, we presented the results of a non-adiabatic pulsation analysis of the recently discovered carbon-rich hot DQ white dwarf stars. Our study relies on the full evolutionary models of hot DQ white dwarfs recently developed by Althaus et al . (2009), that consistently cover the whole evolution from the born-again stage to the white dwarf cooling track. Specifically, we performed a stability analysis on white dwarf models from stages before the blue edge of the DBV instability strip ( T eff ≈ 30000 K) until the domain of the hot DQ white dwarfs (18000-24000 K), including the transition DB→hot DQ white dwarf. We explore evolutionary models with M * = 0.585 M ⊙ and M * = 0.87 M ⊙ , and two values of thickness of the He-rich envelope ( M He = 2 × 10 −7 M * and M He = 10 −8 M * ).
dc.descriptionInstituto de Astrofísica de La Plata
dc.formatapplication/pdf
dc.format370-370
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by/4.0/
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)
dc.subjectAstronomía
dc.subjectFísica
dc.subjectwhite dwarfs
dc.subjectphotometric variability
dc.titleHot DQ white dwarfs: a pulsational test of the mixing scenario for their formation
dc.typeArticulo
dc.typeComunicacion


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