Abstract Details

Name: Kiren OV
Affiliation: Christ University
Conference ID: ASI2021_144
Title : Dark matter primordial planets: Effects of baryonic admixture
Authors and Co-Authors : OV Kiren, Arun Kenath, C Sivaram, KT Paul
Abstract Type : Poster
Abstract Category : General Relativity and Cosmology
Abstract : Dark matter (DM) is theorized as one of the basic constituents of the Universe, five times more abundant than ordinary matter. Several astronomical measurements have confirmed the existence of DM, leading to experiments worldwide to observe them directly. The interaction of these particles with the ordinary matter has proven so weak that they have escaped direct detection. In our earlier work we had discussed the possibility of primordial planets composed entirely of DM to be the main reason for not detecting DM particles. These DM particles are heavier compared to ambient hydrogen and helium atoms and are accreted much earlier since they are not coupled to background radiation. It has been suggested that primordial planets could have formed in the early Universe and the missing baryons in the Universe could be explained by primordial free-floating planets of solid hydrogen. The number of such planets in the Milky Way is enormous (~10^14). Many such planets were recently discovered around the old and metal poor stars and such planets could have formed at early epochs. Another possibility of missing baryons in the Universe could be that these baryons are admixed with DM particles inside the primordial planets. Here we discuss the possibility of admixture of baryons to the DM primordial planets discusses earlier. We consider gravitationally bound DM objects with the DM particles constituting them varying in mass from 20-100GeV. Different compositions of DM particles mixed with baryonic matter in forming the primordial planets are discussed. For the different mass range of DM particles forming DM planets, we have estimated the radius and density of these planets with different compositions of DM and baryonic particles. It is found that for heavier mass DM particles with the admixture of baryonic particles, the mass of the planet increases and can reach Jupiter mass.