Constraints on fourth order gravity from binary pulsar and gravitational waves
Abstract
We have earlier proposed a fourth order gravity model as a possible explanation for late time cosmic acceleration, and for flattened galaxy rotation curves. The model has a free length parameter whose value depends on the scale of the system under study (e.g. the whole Universe, a galaxy, or a compact binary pulsar). In the present work, we investigate the constraints imposed on the free model parameter by Hulse-Taylor binary pulsar data: periastron advance; and emission of gravitational waves and consequent period decay. It is shown that the model is consistent with these observations, provided the length parameter is bounded from above.
Cite
@article{arxiv.1601.02357,
title = {Constraints on fourth order gravity from binary pulsar and gravitational waves},
author = {Shreya Banerjee and Sayantani Bera and Srimanta Banerjee and Tejinder P. Singh},
journal= {arXiv preprint arXiv:1601.02357},
year = {2017}
}
Comments
11 pages plus appendices (total 18 pages), 1 figure, 1 table, text modified, new calculations and references added, conclusions unchanged