Category Archives: News

25th February 2021 – London Cosmology Discussion Meeting

For this UCL-organized Meeting we asked two speakers, Prof. Alan Heavens (Imperial – slides) and Prof. John Ellis (King’s), to each give us a thought-provoking summary of perspectives on how to break the standard model of cosmology (from the Astrophysics and HEP viewpoints, respectively) in the next 10-20 years. Each talk was followed by 10 minutes of small-group discussion in randomly assigned breakout rooms, and the session drew to a close with a 10-minute full-group discussion. In this discussion, the group was asked two questions: “What is more likely to break LCDM (Astro or HEP)?” and “What’s your best bet on what will break it?”. The answers to these surveys can be found below, along with slides for the two talks.

Program

  • 15:30 – 15:35: Welcome + Formalities
  • 15:35 – 16:05: Prof. Alan Heavens
  • 16:05 – 16:15: Breakout room discussion
  • 16:15 – 16:20: Summary of breakout room discussions
  • 16:20 – 16:50: Prof. John Ellis
  • 16:50 – 17:00: Breakout room discussion
  • 17:00 – 17:05: Summary of breakout room discussions
  • 17:05 – 17:15: Final discussion and Summary

Slides

21st January 2021 – London Cosmology Discussion Meeting

At this discussion meeting, KCL conducted a poll of attendees asking for their opinion on ‘What is Dark Matter Really?’. The result of the poll is below!

in the browser14.00–14.30: James Alvey (KCL) – Degeneracy, Dwarfs, and (Fermionic) Dark Matter
14.30–15.00: Daniel Thomas (QMUL) – Coldness of dark matter: theoretical convenience or observational fact?

15.00–15.40: Discussion / coffee break

15.40–16.10: Corentin Cadiou (UCL) – Angular momentum evolution can be predicted from cosmological initial conditions
16.10–16.40: Nashwan Sabti (KCL) – What BBN can tell us about thermal dark sectors

10th December 2020 – London Cosmology Discussion Meeting

2:20pm – 2:30pm Joining meeting
2:30pm – 2:50pm Brainstorming on future challenges
2:50pm – 3:30pm Andrew Jaffe: “Anisotropies of the gravitational wave
background”

3:30pm – 3:50pm Coffee break
3:50pm – 4:30pm Alexander Jenkins: “Modelling and measuring the
astrophysical GW background”

4:30pm – 5:10pm Katarina Martinovic: “Separating SGWB Sources”
5:10pm – 5:30pm Further discussion

19th November 2020 – London Cosmology Discussion Meeting

2:30pm-2:40pm Joining meeting
2:40pm-3:05pm Ze Fonseca (QMUL), Line Intensity Mapping: A “Novel” window to the cosmic web
3:15pm-3:40pm Steve Cunnington (QMUL), Introducing 21cm Intensity Mapping and its potential to unlock the largest scales
3:40pm-3:50pmBreak
3:50pm-4:15pm Ian Hothi (ICL), Comparing Foreground Removal Techniques for Recovery of the LOFAR-EoR 21cm Power Spectrum
4:15pm-4:30pm Questions, and discussion re: format of following meetings

27th February 2020 – London Cosmology Discussion Meeting

14.00–14.35: Eugene Lim – “Numerical Relativity of Weird Stuff”
14.35–15.10: Constantina Nicolaou“The Impact of Peculiar Velocities on the Calculation of H_0 from Gravitational Waves”
15.10–15.50: Coffee break
15.50–16.25: Alex Jenkins“Probing the Early and Late Universe with the Gravitational-Wave Background”
16.25–17.00: Arianna Renzini“High Angular Resolution Gravitational-Wave Astronomy”

23rd January 2020 – London Cosmology Discussion Meeting

Theme: “Neutrinos in Cosmology”
 
14.00–14.35: Miguel Escudero – Neutrino Cosmology in 2020: Where do we stand?
14.35–15.10: Constance Mahony – Target Neutrino Mass Precision for Determining the Neutrino Hierarchy
15.10–15.50: Coffee break
15.50–16.25: James Alvey – Big Bang Nucleosynthesis with Light Thermal Dark Sectors
16.25–17.00: Sophie King – From T2K to Hyper-K: A new era of precision in neutrino physics

5th December 2019 – London Cosmology Discussion Meeting

Theme: "Forward modelling in cosmology".
14:00-14:25 (20+5') Stephen Feeney (UCL) - TBA
14:25-14:50 (20+5') Cora Uhlemann (U. Cambridge/Newcastle U.) - Going forward with counts-in-cells
14:50-15:15 (20+5') Krishna Naidoo (UCL) - Beyond two-point statistics: using the minimum spanning tree for cosmology on the next generation of galaxy surveys
15:15-15:50 Coffee break
15:50-16:15 (20+5') Natalia Porqueres (IC) - Inferring the dynamical growth of structures at high-redshift from the Lyman-alpha forest
16:15-16:40 (20+5') Phill Bull (QMUL) - Forward modelling in the context of high dynamic range 21cm experiments
16:40-17:00 Discussion session

7th June 2019 – London Cosmology Discussion Meeting

Theme: Baryons in Cosmology

14:00-14:30: Catherine Watkinson (Imperial) – Cosmology from 21cm maps
14:30-15:00: Nicolas Laporte (UCL P&A) – The onset of star formation 250 million years after the Big Bang
15:00-15:30: Coffee break
15:30-16:00: Bernard Carr (Queen Mary) – Primordial Black Holes and the role of MACHOs in as dark matter
16:00-17:00: Discussion

28th February 2019 – London Cosmology Discussion Meeting

Theme: Tensions in Cosmology

14:00 – 14:25 Andrew Jaffe (Imperial): Planck 2018 results and tensions with external data sets
14:25 – 14:50 Daniel Mortlock (Imperial): Local measurements of H_0
14:50 – 15:15 Pablo Lemos (UCL): Quantifying tension in cosmology 
15:15 – 15:45 Coffee break at the RAS
15:45 – 16:10 Benjamin Joachimi (UCL): Weak lensing measurements and the sigma_8 tension
16:10 – 16:35 Eugene Lim (King’s): Tensions in inflationary cosmology
16:35 – 17:00 Open discussion