Constraining the physics of carbon crystallization through pulsations of a massive DAV BPM37093

We are trying to reduce the largest uncertainties in using white dwarf stars as Galactic chronometers by understanding the details of carbon crystalliazation that currently result in a 1-2 Gyr uncertainty in the ages of the oldest white dwarf stars. We expect the coolest white dwarf stars to have cr...

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Detalles Bibliográficos
Autor principal: Corti, Mariela Alejandra
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
stars: evolution
stars: variables : other
stars: white dwarfs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86673
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86673
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
stars: evolution
stars: variables : other
stars: white dwarfs
spellingShingle Ciencias Astronómicas
stars: evolution
stars: variables : other
stars: white dwarfs
Corti, Mariela Alejandra
Constraining the physics of carbon crystallization through pulsations of a massive DAV BPM37093
topic_facet Ciencias Astronómicas
stars: evolution
stars: variables : other
stars: white dwarfs
description We are trying to reduce the largest uncertainties in using white dwarf stars as Galactic chronometers by understanding the details of carbon crystalliazation that currently result in a 1-2 Gyr uncertainty in the ages of the oldest white dwarf stars. We expect the coolest white dwarf stars to have crystallized interiors, but theory also predicts hotter white dwarf stars, if they are massive enough, will also have some core crystallization. BPM 37093 is the first discovered of only a handful of known massive white dwarf stars that are also pulsating DAV, or ZZ Ceti, variables. Our approach is to use the pulsations to constrain the core composition and amount of crystallization. Here we report our analysis of 4 hours of continuous time series spectroscopy of BPM 37093 with Gemini South combined with simultaneous time-series photometry from Mt. John (New Zealand), SAAO, PROMPT, and Complejo Astronomico El Leoncito (CASLEO, Argentina).
format Articulo
Articulo
author Corti, Mariela Alejandra
author_facet Corti, Mariela Alejandra
author_sort Corti, Mariela Alejandra
title Constraining the physics of carbon crystallization through pulsations of a massive DAV BPM37093
title_short Constraining the physics of carbon crystallization through pulsations of a massive DAV BPM37093
title_full Constraining the physics of carbon crystallization through pulsations of a massive DAV BPM37093
title_fullStr Constraining the physics of carbon crystallization through pulsations of a massive DAV BPM37093
title_full_unstemmed Constraining the physics of carbon crystallization through pulsations of a massive DAV BPM37093
title_sort constraining the physics of carbon crystallization through pulsations of a massive dav bpm37093
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/86673
work_keys_str_mv AT cortimarielaalejandra constrainingthephysicsofcarboncrystallizationthroughpulsationsofamassivedavbpm37093
bdutipo_str Repositorios
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