Challenging the standard cosmological model, London, 15-16 Apr 2024
Posted: November 17 2023
https://royalsociety.org/science-events-and-lectures/2024/04/cosmological-model/
Scientific discussion meeting organised by Prof James Binney FRS, Dr Roya Mohayaee, Prof John Peacock FRS & Prof Subir Sarkar
15-16 April 2024, 09:00-17:00, The Royal Society, London SW1Y 5AG
Enquiries: Scientific Programmes team <[Log in to view email]>
Is the universe simple enough to be adequately described by the standard ΛCDM cosmological model which assumes the isotropic and homogeneous Friedmann-Lemaître-Robertson-Walker metric? Tensions have emerged between the values of cosmological parameters estimated in different ways. Do these tensions signal that our model is too simple? Could a more sophisticated model account for the data without invoking a Cosmological Constant?
Free to attend - both in-person and on-line attendance available.
Advance registration is essential (an optional lunch is available to purchase during registration): https://rsproduction.powerappsportals.com/events/details/?id=a620b6c7-3a68-ee11-9ae7-6045bdf1e702
Meeting papers will be published in Philosophical Transactions of the Royal Society A.
![Image](https://royalsociety.org/-/media/events/2024/04/cosmological-model/Cosmological-model-web-alternative.jpg)
Credit: NASA's Goddard Space Flight Center
Monday 15 April
Session 1
Chair: Prof John Ellis FRS, King's College London, UK
09:00-09:05 Welcome by the Royal Society and organisers
09:05-09:30 The case that the standard model, dark matter and all, is a good approximation to reality, Prof Jim Peebles FRS, Princeton University, USA
09:30-09:45 Discussion
09:45-10:15 Challenges to the Lambda CDM Cosmology, Prof George Efstathiou FRS, University of Cambridge, UK
10:15-10:30 Discussion
10:30-11:00 Break
11:00-11:30 New JWST results: measuring the Hubble Constant, Prof Wendy Freedman FRS, University of Chicago, USA
11:30-11:45 Discussion
11:45-12:15 The S8 tension (TBC), Dr Alexandra Amon, University of Cambridge, UK
12:15-12:30 Discussion
12:30-13:30 Lunch
Session 2
Chair: Prof Ruth Durrer, University of Geneva, Switzerland
13:30-14:00 Do we understand the growth of structure over cosmic time? A CMB Lensing story, Prof Mathew Madhavacheril, University of Pennsylvania, USA
14:00-14:15 Discussion
14:15-14:45 The ISW puzzle, Prof István Szapudi, University of Hawai‘i, USA
14:45-15:00 Discussion
15:00-15:30 Break
15:30-16:00 The Ellis-Baldwin test, Dr Nathan Secrest, US Naval Observatory, Washington, USA
16:00-16:15 Discussion
16:15-16:45 Tests of the LCDM paradigm, Prof Chris Clarkson, Queen Mary University of London, UK
16:45-17:00 Discussion
17:00-18:15
Tuesday 16 April
Session 1
Chair: Prof Pedro Ferreira, University of Oxford, UK
09:00-09:30 Investigating ultra-large large-scale structures: potential implications for cosmology, Alexia Lopez, University of Central Lancashire, UK
09:30-09:45 Discussion
09:45-10:15 Probing the isotropy of the local Universe with galaxy clusters, Dr Konstantinos Migkas, Leiden University, The Netherlands
10:15-10:30 Discussion
10:30-11:00 Break
11:00-11:30 Challenges to the standard cosmological model from large-scale bulk flow estimates, Prof Richard Watkins, Willamette University, USA
11:30-11:45 Discussion
11:45-12:15 Do supernovae indicate an accelerating Universe?, Dr Mohamed Rameez, Tata Institute for Fundamental Research, Mumbai, India
12:15-12:30 Discussion
12:30-13:30 Lunch
Session 2
Chair: Prof Joseph Silk FRS, Institut Astrophysique de Paris, France & Johns Hopkins University, USA & University of Oxford, UK
13:30-14:00 Quantum gravity & Lambda, Prof Georgi Dvali, Ludwig-Maximilians-University, Germany
14:00-14:15 Discussion
14:15-14:45 Reflecting the Universe in a mirror, Dr Oliver HE Philcox, Columbia University and Simons Foundation, USA
14:45-15:00 Discussion
15:00-15:30 Break
15:30-16:00 The future, Prof Nathalie Palanque-Delabrouille, Lawrence Berkeley National Laboratory, USA
16:00-16:15 Discussion
16:15-17:00
Scientific discussion meeting organised by Prof James Binney FRS, Dr Roya Mohayaee, Prof John Peacock FRS & Prof Subir Sarkar
15-16 April 2024, 09:00-17:00, The Royal Society, London SW1Y 5AG
Enquiries: Scientific Programmes team <[Log in to view email]>
Is the universe simple enough to be adequately described by the standard ΛCDM cosmological model which assumes the isotropic and homogeneous Friedmann-Lemaître-Robertson-Walker metric? Tensions have emerged between the values of cosmological parameters estimated in different ways. Do these tensions signal that our model is too simple? Could a more sophisticated model account for the data without invoking a Cosmological Constant?
Free to attend - both in-person and on-line attendance available.
Advance registration is essential (an optional lunch is available to purchase during registration): https://rsproduction.powerappsportals.com/events/details/?id=a620b6c7-3a68-ee11-9ae7-6045bdf1e702
Meeting papers will be published in Philosophical Transactions of the Royal Society A.
![Image](https://royalsociety.org/-/media/events/2024/04/cosmological-model/Cosmological-model-web-alternative.jpg)
Credit: NASA's Goddard Space Flight Center
Monday 15 April
Session 1
Chair: Prof John Ellis FRS, King's College London, UK
09:00-09:05 Welcome by the Royal Society and organisers
09:05-09:30 The case that the standard model, dark matter and all, is a good approximation to reality, Prof Jim Peebles FRS, Princeton University, USA
09:30-09:45 Discussion
09:45-10:15 Challenges to the Lambda CDM Cosmology, Prof George Efstathiou FRS, University of Cambridge, UK
10:15-10:30 Discussion
10:30-11:00 Break
11:00-11:30 New JWST results: measuring the Hubble Constant, Prof Wendy Freedman FRS, University of Chicago, USA
11:30-11:45 Discussion
11:45-12:15 The S8 tension (TBC), Dr Alexandra Amon, University of Cambridge, UK
12:15-12:30 Discussion
12:30-13:30 Lunch
Session 2
Chair: Prof Ruth Durrer, University of Geneva, Switzerland
13:30-14:00 Do we understand the growth of structure over cosmic time? A CMB Lensing story, Prof Mathew Madhavacheril, University of Pennsylvania, USA
14:00-14:15 Discussion
14:15-14:45 The ISW puzzle, Prof István Szapudi, University of Hawai‘i, USA
14:45-15:00 Discussion
15:00-15:30 Break
15:30-16:00 The Ellis-Baldwin test, Dr Nathan Secrest, US Naval Observatory, Washington, USA
16:00-16:15 Discussion
16:15-16:45 Tests of the LCDM paradigm, Prof Chris Clarkson, Queen Mary University of London, UK
16:45-17:00 Discussion
17:00-18:15
If you would like to apply to present a poster please submit your proposed title, abstract (less than 200 words and in third person), author list, name of the proposed presenter & institution to <[Log in to view email]> no later than Monday 4 March. Please include ‘Poster abstract submission’ in the subject line. Note that places are limited and posters are selected at the scientific organisers’ discretion.Poster session
Tuesday 16 April
Session 1
Chair: Prof Pedro Ferreira, University of Oxford, UK
09:00-09:30 Investigating ultra-large large-scale structures: potential implications for cosmology, Alexia Lopez, University of Central Lancashire, UK
09:30-09:45 Discussion
09:45-10:15 Probing the isotropy of the local Universe with galaxy clusters, Dr Konstantinos Migkas, Leiden University, The Netherlands
10:15-10:30 Discussion
10:30-11:00 Break
11:00-11:30 Challenges to the standard cosmological model from large-scale bulk flow estimates, Prof Richard Watkins, Willamette University, USA
11:30-11:45 Discussion
11:45-12:15 Do supernovae indicate an accelerating Universe?, Dr Mohamed Rameez, Tata Institute for Fundamental Research, Mumbai, India
12:15-12:30 Discussion
12:30-13:30 Lunch
Session 2
Chair: Prof Joseph Silk FRS, Institut Astrophysique de Paris, France & Johns Hopkins University, USA & University of Oxford, UK
13:30-14:00 Quantum gravity & Lambda, Prof Georgi Dvali, Ludwig-Maximilians-University, Germany
14:00-14:15 Discussion
14:15-14:45 Reflecting the Universe in a mirror, Dr Oliver HE Philcox, Columbia University and Simons Foundation, USA
14:45-15:00 Discussion
15:00-15:30 Break
15:30-16:00 The future, Prof Nathalie Palanque-Delabrouille, Lawrence Berkeley National Laboratory, USA
16:00-16:15 Discussion
16:15-17:00
Prof Subir Sarkar, Prof James Binney FRS, Dr Roya Mohayaee, Prof John Peacock FRS, Prof John Ellis FRS, Prof Ruth Durrer, Prof Pedro Ferreira, Prof Joseph Silk FRSPanel Discussion