Cosmology from Home 2021 5 July 2021 – 16 July 2021 Upala Mukhopadhyay Astroparticle Physics and Cosmology Division Saha Institute of Nuclear Physics, Kolkata, India Collaborators: Debasish Majumdar, Kanan K Datta; Phys Rev D 103 (2021) 6, 063510 Probing Interacting Dark Energy and Scattering of Baryons with Dark Matter in
Cosmology from Home 2022 Based on "Quintessence or Phantom: Study of scalar field dark energy models through a general parametrization of the Hubble parameter " Physics of the Dark Universe 36, 101037 (2022) arXiv: 2201 09306
years there has been increasing demand for cosmology to be taught at university in an accessible manner Traditionally, cosmology was taught, as it was to me, as the tail end of a general relativity course, with a derivation ofthe metric for an expanding Universe and a few solutions Such a course fails to capture the flavour of modem cosmology
dark energy and dark matter, suggests a popular name for the modern standard cosmology: the ‘double dark’ theory, as Nancy Abrams and I proposed in our recent book about modern cosmology and its broader implications [3] Despite a long history [4] of observation and theory, the physical nature of dark matter
Cosmology from Home July 2022 Work Based on JCAP 01 (2022) 053 [arXiv:2107 04784] Motivation: Cosmology Overview: Slow down expansion Speed up expansion 6
Cosmology à la Newton • K ~ total energy of a comoving particle • K < 0, RHS > 0, since da/dt > 0 today, universe will expand forever • K = 0, RHS > 0, universe will expand forever but da/dt ? 0 as t ? ? • K > 0, RHS = 0 when a = 8?G? 0 /3Kc2, at this point expansion stops and universe starts to contract • Critical density
Exhibit Connections: Welcome Home, Mapping the Universe, Cosmic Calendar Goal ments fully and to write down arguments in support of their answers
point at which this extrapolation of classical physics breaks down This is fluctuations leave it a long way from home in the form of the potential minimum