July 9, 2020 to December 31, 2024
Europe/Zurich timezone

Dear colleagues,

To promote scientific discussions during this pandemic, we are organizing a multi-institutional online monthly colloquium series, i.e. Copernicus Colloquium Series (CCS), seeking the most outstanding speakers to introduce innovative ideas and frontier research in various fields. The CCS is a sister series associated with the Copernicus Webinar Series (CWS), both are named after the famous Polish Astronomer, Nicolaus Copernicus, whose discovery eventually marked the dawn of modern science.

We would like to invite you to take part in the upcoming 22nd Colloquium talk,

Speaker:   David Langlois (Universite Paris Cite, CNRS, AstroParticule et Cosmologie)

Time:        23rd March, Thursday, 3pm CET (10 pm Beijing, 11 pm JST, 10am EDT)

Title: Scalar-tensor theories of modified gravity in cosmology and in strong-gravity objects.

This talk will present theories of modified gravity that contain a single scalar degree of freedom, in particular the very general framework of Degenerate Higher-Order Scalar-Tensor (DHOST) theories, which includes and extends Horndeski and Beyond Horndeski theories. I will then discuss cosmological aspects of these theories, notably the dynamics of cosmological perturbations. I will also present some results on non-rotating black holes and their perturbations in the context of DHOST theories.

Zoom link:
meeting id: 9423380685
Password: gravity


This series is co-organised by the cosmology groups in the following institutions (in alphabetical order): 

Harvard University, Hong Kong University of Science and Technology, Institut d'Astrophysique de Paris, Institute of Physics of the Czech Academy of Science, Jagiellonian University, Kyoto University, Leiden University, Ludwig Maximilians University, McGill University, Perimeter Institute, Polish Society on Relativity, The Pennsylvania State University, The University of Tokyo, Tsinghua University, University of Geneva, University of Groningen, University of Science and Technology of China, University of Waterloo.

Science Organising Committee members (in alphabetical order):

Niayesh Afshordi, Robert Brandenberger, Yifu Cai, Xingang Chen, Ema Dimastrogiovanni, Ruth Durrer, Ghazal Geshnizjani, Chunshan Lin, Jerome Martin, Jakub Mielczarek, Viatcheslav Mukhanov, Shinji Mukohyama, Subodh Patil, Misao Sasaki, Sarah Shandera, Wei Song, Alexander Vikman, Yi Wang, Zhong-Zhi Xianyu