An upper limit to the secular variation of the gravitational constant from white dwarf stars

dc.creatorGarcía Berro, Enrique
dc.creatorLorén Aguilar, Pablo
dc.creatorTorres, Santiago
dc.creatorAlthaus, Leandro Gabriel
dc.creatorIsern, Jordi
dc.date2011-05
dc.date2020-04-21T19:27:34Z
dc.date.accessioned2023-07-14T19:20:28Z
dc.date.available2023-07-14T19:20:28Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/93935
dc.identifierhttp://iopscience.iop.org/article/10.1088/1475-7516/2011/05/021/meta
dc.identifierissn:1475-7516
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7434924
dc.descriptionA variation of the gravitational constant over cosmological ages modifies the main sequence lifetimes and white dwarf cooling ages. Using an state-of-the-art stellar evolutionary code we compute the effects of a secularly varying G on the main sequence ages and, employing white dwarf cooling ages computed taking into account the effects of a running G, we place constraints on the rate of variation of Newton's constant. This is done using the white dwarf luminosity function and the distance of the well studied open Galactic cluster NGC 6791. We derive an upper bound Ġ/G ~ −1.8 × 10−12 yr−1. This upper limit for the secular variation of the gravitational constant compares favorably with those obtained using other stellar evolutionary properties, and can be easily improved if deep images of the cluster allow to obtain an improved white dwarf luminosity function.
dc.descriptionInstituto de Astrofísica de La Plata
dc.formatapplication/pdf
dc.format21-36
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Astronómicas
dc.subjectGravity
dc.subjectWhite dwarfs
dc.titleAn upper limit to the secular variation of the gravitational constant from white dwarf stars
dc.typeArticulo
dc.typePreprint


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