Understanding the composition and distribution of baryonic matter in the Universe is a crucial step toward unraveling the mysteries of its formation and evolution. Early estimates and numerical simulations show that most baryons are “missing,” whereas the baryons that are already made into stars and galaxies constitute a small portion of the total baryon budget. Therefore accurate constraints on the missing baryons are valuable to improve our understanding of the fundamental parameters that govern the Universe. In my talk, I will summarize different methods that have been deployed to search for baryons and discuss our recent work to constrain gas on very large scale using the 3.6σ cross-correlation signal detection between the Integrated Sachs-Wolfe effect (ISW) with the Sunyaev-Zeldovich (tSZ) effect. I will also show the associated cosmological and astrophysical constraints obtained from our analyses that shows that the ISW–tSZ cross-correlation is capable of probing the properties of the large-scale diffuse gas.
BIO
I am currently an ANSO fellow (postdoctoral scholar) at the National Astronomical Observatories, Chinese Academy of Sciences, Beijing. Prior to this, I earned a PhD in Cosmology from the University of KwaZulu Natal, South Africa in May, 2021. I earned an MSc in Theoretical Physics from University of Ibadan, Nigeria, and a BSc (First Class) in Physics from Obafemi Awolowo University, Nigeria.
My research interest focuses on the cosmological exploitation of different large-scale structure observables and also on 21cm cosmology.
