Next meeting:
Location: 2.10/ Organizer(s): Bill Wright , Michael KennaAllison
Total votes:
2
(last vote was 1 month ago)
Title:
Author:
Jeremy Sakstein, Harry Desmond, Bhuvnesh Jain
Discussion leader:
Nobody volunteered yet


Total votes:
2
(last vote was 1 month ago)
Author:
Emanuela Dimastrogiovanni, Matteo Fasiello, Gianmassimo Tasinato
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 2 weeks ago)
Author:
R. Calderon, D. Felbacq, R. Gannouji, D. Polarski, A. A. Starobinsky
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 2 weeks ago)
Author:
Stéphane Ilić, Ziad Sakr, Alain Blanchard
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 3 weeks ago)
Author:
Nils Schöneberg, Julien Lesgourgues, Deanna C. Hooper
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Author:
Alex Zucca, Levon Pogosian, Alessandra Silvestri, Yuting Wang, GongBo Zhao
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Author:
Fotios K. Anagnostopoulos, Spyros Basilakos, Emmanuel N. Saridakis
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Author:
Iason Baldes, Debtosh Chowdhury, Michel H. G. Tytgat
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Author:
Christopher T. Davies, Marius Cautun, Baojiu Li
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Title:
Author:
Benjamin D. Wibking, David H. Weinberg, Andrés N. Salcedo, HaoYi Wu, Sukhdeep Singh, Sergio RodríguezTorres, Lehman H. Garrison, Daniel J. Eisenstein
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Author:
Savvas Nesseris, Domenico Sapone, Spyros Sypsas
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Title:
Author:
Matteo Leo, Christian Arnold, Baojiu Li
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Author:
Christian Arnold, Matteo Leo, Baojiu Li
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Title:
Author:
Ozgur Akarsu, Alexey Chopovsky, Valerii Shulga, Ezgi Yalcinkaya, Alexander Zhuk
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Title:
Author:
Harry Desmond, Bhuvnesh Jain, Jeremy Sakstein
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Author:
Charles Dalang, Lucas Lombriser
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Author:
F. F. Santos, R. M. P. Neves, F. A. Brito
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Author:
Ekim Taylan Hanımeli, Isaac Tutusaus, Brahim Lamine, Alain Blanchard
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Title:
Author:
Xing Zhang, Rui Niu, Wen Zhao
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 1 month ago)
Title:
Author:
M. Rossi, M. Ballardini, M. Braglia, F. Finelli, D. Paoletti, A. A. Starobinsky, C. Umiltà
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 2 months ago)
Author:
Paolo Creminelli, Giovanni Tambalo, Filippo Vernizzi, Vicharit Yingcharoenrat
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 2 months ago)
Author:
Thomas Helpin, Mikhail S. Volkov
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 2 months ago)
Title:
Author:
Dhrubo Jyoti, Julian B. Munoz, Robert R. Caldwell, Marc Kamionkowski
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 2 months ago)
Author:
MengXiang Lin, Giampaolo Benevento, Wayne Hu, Marco Raveri
Discussion leader:
Nobody volunteered yet


Total votes:
1
(last vote was 2 months ago)
Title:
Author:
Aneesh P. Naik, Ewald Puchwein, AnneChristine Davis, Debora Sijacki, Harry Desmond
Discussion leader:
Nobody volunteered yet



2 years ago
Title: Norihiro Tanahashi "Causal structure and shock formation in the most general scalartensor theories"
Description: Wave propagation speed in scalartensor theories may vary depending on
environment, and it can cause many peculiar phenomena such as
superluminal propagation and wave form distortion. In this work, we
focus on Horndeski theory and its generalization to two scalar fields,
and examine causal structure and shock formation in those theories.
About the causal structure, we focus on a stationary black hole, and
check if scalar or gravitational wave could come out from black hole
interior to exterior by propagating superluminally. We find that the
scalar field must satisfy certain conditions to prohibit such a
propagation across the horizon. About the shock formation, we examine
conditions for that to occur in Horndeski theory. When the background
solution is symmetric enough, we find that the gravitational wave is
protected from the shock formation while the scalar field suffers from
it.


2 years ago
Title: Jorgos Papadomanolakis "The Effective Field Theory of Dark Energy and Modified Gravity"
Description: In recent years the discovery of the latetime cosmic acceleration triggered the creation of a multitude of theories, which modify General Relativity, in order to give a satisfactory explanation to this phenomenon. Now, with the wealth of current and upcoming observational data, it becomes imperative to create efficient ways to put these theories to the test, both in a model dependent and independent way. This led to the creation of the Effective Field Theory of Dark Energy and Modified Gravity which provides a framework to accomplish this.
In this talk I will introduce the EFT of DE/MG and comment on how it can be used in a model dependent and independent way. Moreover I will exhibit its potential to constrain the landscape of theories by extensively studying the theoretical stability conditions (ghost, gradient and tachyonic/Jeans) of modified gravity theories in the presence of matter fluids.


2 years ago
Title: "Effects of a toymodel of modified gravity on supernova cosmology results" by Bill
Description: Results from supernova cosmology data rely heavily on the ability of Type Ia supernovae to act as standard candles. How does modified gravity affect this 'standardness' and how would it affect the interpretation of the supernova cosmology data?.
