Tag: gravity

• The howling Universe

  

  Before I moved from IFT to IPhT, I filmed a video all about what standard sirens are and why they’re useful for cosmology. The video is now on Youtube, in English with Spanish subtitles. Take a look!

  Natalie Hogg

  February 24, 2022

  Academia, Postdoc, Science

  astronomy, astrophysics, cosmology, einstein, general relativity, gravitational waves, gravity, madrid, neutron stars, outreach, physics, spain, standard sirens, youtube

• The distance duality relation

  

  The distance duality relation tells us how, assuming that photons propagate on null geodesics in a pseudo-Riemannian spacetime and that their number is conserved, luminosity and angular diameter distances are related, via where dL is the luminosity distance, dA the angular diameter distance and z the redshift. This relation was introduced by Etherington in 1933,…

  Natalie Hogg

  October 9, 2020

  PhD, Science

  astrophysics, cosmology, distance duality, forecasting, gravitational waves, gravity, mock data, paper, PhD, physics, supernovae

• Thesis off-cuts: the ancient history of general relativity

  

  I have recently been thinking a lot about what introductory and background material I want to include in my PhD thesis, as my self-imposed December deadline continues to hurtle towards me at an alarming speed. Concurrent with this thinking, I’ve also recently been enjoying a fantastic book called The Poincaré Conjecture by Donal O’Shea, all…

  Natalie Hogg

  June 27, 2020

  PhD, Science

  cosmology, general relativity, gravity, perelman, PhD, physics, poincare, thesis, thesis off-cuts, topology