An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs

A secular variation of the gravitational constant modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code and an up-to-date pulsational code we compute the effects of a secularly varying G on the pulsational properties of variable whit...

Descripción completa

Detalles Bibliográficos
Autores principales: Córsico, Alejandro Hugo, Althaus, Leandro Gabriel, García Berro, Enrique, Romero, Alejandra Daniela
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Astronómicas
Gravity
White dwarfs
Brown dwarfs
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/93932
http://iopscience.iop.org/article/10.1088/1475-7516/2013/06/032
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-93932
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
Gravity
White dwarfs
Brown dwarfs
spellingShingle Ciencias Astronómicas
Gravity
White dwarfs
Brown dwarfs
Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
García Berro, Enrique
Romero, Alejandra Daniela
An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs
topic_facet Ciencias Astronómicas
Gravity
White dwarfs
Brown dwarfs
description A secular variation of the gravitational constant modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code and an up-to-date pulsational code we compute the effects of a secularly varying G on the pulsational properties of variable white dwarfs. Comparing the the theoretical results obtained taking into account the effects of a running G with the observed periods and measured rates of change of the periods of two well studied pulsating white dwarfs, G117-B15A and R548, we place constraints on the rate of variation of Newton's constant. We derive an upper bound Ġ/G ~ −1.8 × 10−10 yr−1 using the variable white dwarf G117-B15A, and Ġ/G ~ −1.3 × 10−10 yr−1 using R548. Although these upper limits are currently less restrictive than those obtained using other techniques, they can be improved in a future measuring the rate of change of the period of massive white dwarfs. Export citation and abstract
format Articulo
Preprint
author Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
García Berro, Enrique
Romero, Alejandra Daniela
author_facet Córsico, Alejandro Hugo
Althaus, Leandro Gabriel
García Berro, Enrique
Romero, Alejandra Daniela
author_sort Córsico, Alejandro Hugo
title An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs
title_short An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs
title_full An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs
title_fullStr An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs
title_full_unstemmed An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs
title_sort independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/93932
http://iopscience.iop.org/article/10.1088/1475-7516/2013/06/032
work_keys_str_mv AT corsicoalejandrohugo anindependentconstraintonthesecularrateofvariationofthegravitationalconstantfrompulsatingwhitedwarfs
AT althausleandrogabriel anindependentconstraintonthesecularrateofvariationofthegravitationalconstantfrompulsatingwhitedwarfs
AT garciaberroenrique anindependentconstraintonthesecularrateofvariationofthegravitationalconstantfrompulsatingwhitedwarfs
AT romeroalejandradaniela anindependentconstraintonthesecularrateofvariationofthegravitationalconstantfrompulsatingwhitedwarfs
AT corsicoalejandrohugo independentconstraintonthesecularrateofvariationofthegravitationalconstantfrompulsatingwhitedwarfs
AT althausleandrogabriel independentconstraintonthesecularrateofvariationofthegravitationalconstantfrompulsatingwhitedwarfs
AT garciaberroenrique independentconstraintonthesecularrateofvariationofthegravitationalconstantfrompulsatingwhitedwarfs
AT romeroalejandradaniela independentconstraintonthesecularrateofvariationofthegravitationalconstantfrompulsatingwhitedwarfs
bdutipo_str Repositorios
_version_ 1764820491991777282

Ejemplares similares