Mutually interacting tachyon dark energy with variable G and Lambda

作者：Sadeghi Jafar^*; Khurshudyan Martiros; Hakobyan Margarit; Farahani Hoda

来源：Research in Astronomy and Astrophysics, 2015, 15(2): 175-190.

DOI：10.1088/1674-4527/15/2/002

• cosmology
• early universe
• cosmological parameters
• dark energy

We consider a tachyonic scalar field as a model of dark energy with interaction between components in the case of variable G and Lambda. We assume a flat Universe with a specific form of scale factor and study cosmological parameters numerically and graphically. Statefinder analysis is also performed. For a particular choice of interaction parameters we succeed in obtaining an analytical expression of densities. We find that our model will be stable at the late stage but there is an instability in the early Universe, so we propose this model as a realistic model of our Universe.

• 出版日期2015-2