| dc.creator | Córsico, Alejandro Hugo | |
| dc.creator | Althaus, Leandro Gabriel | |
| dc.creator | García Berro, Enrique | |
| dc.creator | Romero, Alejandra Daniela | |
| dc.date | 2013-06 | |
| dc.date | 2020-04-21T19:19:40Z | |
| dc.date.accessioned | 2023-07-14T19:20:12Z | |
| dc.date.available | 2023-07-14T19:20:12Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/93932 | |
| dc.identifier | http://iopscience.iop.org/article/10.1088/1475-7516/2013/06/032 | |
| dc.identifier | issn:1475-7516 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7434907 | |
| dc.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 | |
| dc.description | Instituto de Astrofísica de La Plata | |
| dc.format | application/pdf | |
| dc.format | 32-44 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Ciencias Astronómicas | |
| dc.subject | Gravity | |
| dc.subject | White dwarfs | |
| dc.subject | Brown dwarfs | |
| dc.title | An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs | |
| dc.type | Articulo | |
| dc.type | Preprint | |
