Strange stars in f(?) gravity palatini formalism and gravitational wave echoes from them

The compact stars are promising candidates associated with the generation of gravitational waves (GWs). In this work, we study a special type known as strange in $f(\mathcal{R})$ gravity Palatini formalism. Here consider three models viz., Starobinsky, Hu-Sawicki and Gogoi-Goswami domain MIT Bag model linear equations state (EoSs). We compute stellar structures numerically constrained parameters set probable star candidates. shows that consideration stiffer EoSs within favourable may result sufficient compactness to produce echoes GWs. Thus, have computed GWs echo frequencies characteristic times for such stars. It is found compliance experimentally obtained possible candidates, GW all range $65 - 85$ kHz.