论文标题
$ f（\ Mathcal {r}）中的奇怪星星$重力palatini形式主义和引力波回响
Strange stars in $f(\mathcal{R})$ gravity Palatini formalism and gravitational wave echoes from them
论文作者
论文摘要
紧凑型恒星是与引力波（GWS）产生相关的有希望的候选者。在这项工作中，我们研究了一种特殊类型的紧凑型星星，称为$ f（\ Mathcal {r}）$ Gravity Palatini形式主义。在这里，我们考虑了三个有希望的$ f（\ Mathcal {r}）$重力模型，即Starobinsky，Hu-Sawicki和Gogoi-Goswami模型，在MIT袋模型和状态线性方程（EOSS）的域中。我们通过数值计算恒星结构，并用一组可能的奇怪的星星候选者来限制$ f（\ Mathcal {r}）$模型参数。研究表明，在有利的$ f（\ Mathcal {r}）$重力模型参数中考虑更硬的MIT袋模型和线性EOSS可能会导致具有足够紧凑性的奇怪恒星，以产生GWS的回声。因此，我们计算了此类恒星的GWS回声频率和特征回波时间。已经发现，根据实验获得的可能的奇怪的星星候选者，所有型号的GW Echo频率均在65-85 $ kHz的范围内。
The compact stars are promising candidates associated with the generation of gravitational waves (GWs). In this work, we study a special type of compact stars known as strange stars in the $f(\mathcal{R})$ gravity Palatini formalism. Here we consider three promising $f(\mathcal{R})$ gravity models viz., Starobinsky, Hu-Sawicki and Gogoi-Goswami models in the domain of MIT Bag model and linear equations of state (EoSs). We compute the stellar structures numerically and constrained the $f(\mathcal{R})$ model parameters with a set of probable strange star candidates. The study shows that the consideration of stiffer MIT Bag model and linear EoSs within a favourable set of $f(\mathcal{R})$ gravity model parameters may result in strange stars with sufficient compactness to produce echoes of GWs. Thus, we have computed the GWs echo frequencies and characteristic echo times for such stars. It is found that in compliance with the experimentally obtained possible strange star candidates, the obtained GW echo frequencies for all the models are in the range of $65 - 85$ kHz.
