标题： 可行的非各向同性暴胀和再加热在瞬子模型中 显示英文标题

标题： Viable Anisotropic Inflation and Reheating in the Tachyon Model

摘要： 我们研究在各向异性背景下的中间快子膨胀。 通过使用在各向异性几何中得到的弗里德曼方程，我们得到了快子模型中的慢滚参数。 慢滚参数中各向异性效应的存在改变了我们设置中的扰动参数，这可能改变其观测可行性。 为了检验这一点，我们进行了数值分析，并用Planck2018 TT, TE, EE +lowE+lensing+BK14(18)+BAO数据测试结果。 我们表明，在各向异性和中间参数的一些范围内，中间各向异性膨胀在观测上是可行的。 我们还表明，我们模型中的等边非高斯性幅度的数量级为$10^{-2}-10^{-1}$。 通过研究我们设置中的再加热过程，我们发现在这个模型中有可能出现瞬时再加热。 我们还发现，在我们设置中的再加热温度与大爆炸核合成是一致的。 显示英文摘要

摘要： We study the intermediate tachyon inflation in an anisotropic background. By using the Friedmann equations obtained in the anisotropic geometry, we obtain the slow-roll parameters in the tachyon model. The presence of the anisotropic effects in the slow-roll parameters changes the perturbation parameters in our setup which may change its observational viability. To check this, we perform a numerical analysis and test the results with Planck2018 TT, TE, EE +lowE+lensing+BK14(18)+BAO data. We show that the intermediate anisotropic inflation in some ranges of the anisotropic and intermediate parameters is observationally viable. We also show that the equilateral amplitude of the non-gaussianity in our model is of the order of $10^{-2}-10^{-1}$. By studying the reheating process in our setup, we find that it is possible to have instantaneous reheating in this model. We also find that the temperature during the reheating in our setup is consistent with Big-Bang nucleosynthesis.