Tag: gravitational waves

• 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

• Standard sirens, Cobaya and Beethoven’s 9th: Madrid week two

  

  As of tomorrow, I’ll have been in Madrid for two weeks! Time really does fly. The weather is still freezing and there’s fresh snow on the hills behind campus (as you can hopefully see in the header image, which I took on my commute this morning). This week I made a proper start on the…

  Natalie Hogg

  January 20, 2020

  PhD, Travel

  beethoven, cosmology, gravitational waves, lta, madrid, music, PhD, physics, snow, study abroad, studying abroad