| Name: | Trupti Patil |
| Affiliation: | Indian Institute of Science Education and Research Bhopal |
| Conference ID : | ASI2024_27 |
| Title : | Coupled Quintessence scalar field model in light of observational datasets |
| Authors : | Trupti Patil 1, Ruchika 2, Sukanta Panda 1 |
| Authors Affiliation: | 1 Trupti Patil, Sukanta Panda Affiliation - Department of Physics, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal -462066, Madhya Pradesh, India
2 Ruchika Affiliation - Physics Department and INFN, Università di Roma “ La Sapienza”, Ple Aldo Moro 2, 00185, Rome, Italy |
| Mode of Presentation: | Poster |
| Abstract Category : | Galaxies and Cosmology |
| Abstract : | The recent observations from SH0ES 2022 results confirmed more than 5 sigma deviation in determining the value of the Hubble Constant from the local distance ladder (using HST) and inverse distance ladder (using Planck). Assuming both SH0ES and the Planck team are not making any errors, we went looking for new physics to alleviate the cosmological crisis along with other problems like fine-tuning problem and cosmic coincidence problem. In our work, we analyze a well-theoretically motivated interacting dark energy scalar field model with a time-varying interaction term. Using current cosmological datasets from CMB, BAO, Type-Ia Supernovae, H(z) measurements from cosmic chronometers, angular diameter distance measurements from Megamasers, growth measurements, and local SH0ES measurements, we found that dark energy component may act differently than a cosmological constant at early times. The observational data also favors a small interaction between dark energy and dark matter at late times. The effect of the coupling has been observed on the dynamics of the late universe and on the key cosmological parameters. This has been studied in detail. I will also present the AIC/BIC analysis done for the same. |
