We compute the equation of state (EoS) of strange quark stars (SQSs) with the MIT Bag model using density dependent bag pressure, characterized by a Gaussian distribution function. The bag pressure's density dependence is controlled by three key parameters namely the asymptotic value ($B_{as}$), $\mathrm{\Delta }B(=B_0-B_{as})$, and β. We explore various parameter combinations ($B_{as}$, ΔB, β) that adhere to the Bodmer-Witten conjecture, a criterion for the stability of SQSs. Our primary aim is to analyze the effects of these parameter variations on the structural properties of SQSs. However we find that none of the combinations can satisfy the NICER data for PSR J0030+0451 and the constraint on tidal deformability from GW170817. So it can be emphasized that this model cannot describe reasonable SQS configurations. We also extend our work to calculate structural properties of hybrid stars (HSs). With the density dependent bag model (DDBM), these astrophysical constraints are fulfilled by the HSs configurations within a very restricted range of the three parameters. The present work is the first to constrain the parameters of DDBM for both SQS and HSs using the recent astrophysical constraints on tidal deformability from GW170817 and that on mass-radius relationship from NICER data.

我们使用密度相关的袋压力（以高斯分布函数为特征）通过 MIT Bag 模型计算奇夸克星 (SQS) 的状态方程 (EoS)。袋压力的密度依赖性由三个关键参数控制，即渐近值（${乙}_{As}$),$\mathrm{\Delta }乙（={乙}_0-{乙}_{As}）$、 和β。我们探索各种参数组合（${乙}_{As}$, Δ B , β ) 符合 Bodmer-Witten 猜想，这是 SQS 稳定性的标准。我们的主要目的是分析这些参数变化对 SQS 结构特性的影响。然而我们发现没有一个组合能够满足 PSR J0030+0451 的 NICER 数据和 GW170817 对潮汐变形能力的约束。因此需要强调的是，该模型无法描述合理的SQS配置。我们还扩展了我们的工作来计算混合星（HS）的结构特性。通过密度相关袋模型 (DDBM)，这些天体物理约束由 HS 配置在三个参数的非常有限的范围内满足。目前的工作是第一个使用来自 GW170817 的潮汐可变形性的最新天体物理约束和来自 NICER 数据的质量半径关系的天体物理约束来约束 SQS 和 HS 的 DDBM 参数。