BritGrav 23

Hi everyone! We are very excited to announce the schedule for BritGrav23. Find the details of all the talks on the website. Looking forward to seeing a lot of you in Southampton. sites.google.com/view/britgrav2…

Hi everyone! This is an announcement to say that BritGrav23 is taking over the BritGrav22 account. Remember to sign up for this years conference in Southampton here sites.google.com/view/britgrav23. Abstract deadline is 10th March. Hope to see many of you here :)

#BritGrav23 will be held 13 and 14 April 2023 at the University of Southampton @stag_centre @MathsSoton Registration is free. Abstract deadline is 10 March sites.google.com/view/britgrav23

@matt_pitkin @Fabian_Gittins @GravityIop Recording of @Fabian_Gittins (@stag_centre) delivering the @GravityIop Thesis Prize talk on Gravitational Waves from Deformed Neutron Stars youtu.be/aGr8dpa0ie0 #BritGrav22

"A highly comprehensive thesis that represents a large body of published work" @matt_pitkin on awarding @Fabian_Gittins the @GravityIop thesis prize. #BritGrav22

My first paper, "Hyperboloidal method for frequency-domain self-force calculations", has been published this week in @APSphysics @PhysRevD, Phys. Rev. D 105, 104033 You can find it here: journals.aps.org/prd/abstract/1… or here: arxiv.org/abs/2202.01794

@LancUniPhysics Recording of Samuel Sanchez Lopez (@LancUniPhysics) on Quintessential Inflation in Palatini F(phi,R) Gravity youtu.be/hYrr-IZgb7o Adding the extra terms to the Lagrangian produces the desired inflation and form of dark energy #BritGrav22

Samuel Sanchez Lopez (@LancUniPhysics) is studying quintessence inflation in modified Palatini gravity. So far in agreement with observations, waiting on future experiements like EUCLID arxiv.org/abs/2203.05424 #BritGrav22

@UoPCosmology Recording of Laura Iacconi (@UoPCosmology) on Multi-field Alpha-attractor Inflation: Turning Trajectories and Geometry youtu.be/myjF6h5axAA The power spectrum would be enhanced on small scales #BritGrav22

Laura Iacconi (@UoPCosmology) explains multifield inflation. the model with compatible with observations, and all primordial black holes would have evapourated by today arxiv.org/abs/2112.05092 #BritGrav22

@mathsatshefuni Recording of Richard Daniel (@mathsatshefuni) on Scale Invariant, R^2 Inflation youtu.be/TWK4Qiyv8DA They sould be a rapid drop in the observed power spectrum at small and large scales #BritGrav22

Richad Daniel (@mathsatshefuni) extends Starobinsky inflation and finds a theory where the vacuum expectation value introduces a mass scale that he introduces as the Planck mass arxiv.org/abs/2102.11719 #BritGrav22

@mathsatshefuni Recording of Elsa Teixeira (@mathsatshefuni) on Coupled Quintessence in a Curved Universe youtu.be/ldx5XUa04fc Cosmological tensions are exacerbated in this model #BritGrav22

Elsa Teixeira (@mathsatshefuni) considers an interaction between dark energy and dark matte to resolve the Hubble tension. However, it only makes the tension worse #BritGrav22

@UoPCosmology Recording of Rafaela Gsponer (@UoPCosmology) on Tachyonic Instability Priors for Dark Energy youtu.be/Ah2iHzcYrgg Be cautious in applying these priors as they might not offer benefits #BritGRav22

Rafaela Gsponer is a PhD student at @UoPCosmology. She wants to find prior constraints on Horndeski theories to make it easier to compare to observations. Tachyonic priors are too tricky to use. arxiv.org/abs/2107.01044 #BritGrav22

@NCLMathsStats Recording of @acwgough (@NCLMathsStats) on One Wavefunction to Rule the Multi-stream Regime youtu.be/hpjR-8o-aGM Wave dark matter allows insights into cold dark matter via the correspondence principle #BritGrav22

Alex Gough (@NCLMathsStats) is looking at wave dark matter (like axions). These offer rich phenomenology and insights into cold dark matter #BritGrav22

@mathsatshefuni Recording of Visakan Balakumar (@mathsatshefuni) on Quantum Superradiance on Static Black Hole Space-times youtu.be/VD4Vi2KbKiw Superradiance prevents us from defining empty states at both Scriplus and Scriminus #BritGrav22

Visakan Balakumar talks about superadiance from Reissner–Nordström black holes. An empty quantum state can change to a particle flux leaving Reissner Nordström.@mathsatshefuni #BritGrav22

@UoNMaths Recording of Georgios Antoniou (@UoNMaths) on Stable Scalarized Black Holes in Generalized Scalar-Tensor Theories youtu.be/dOG7UXjHqjk Stable solutions are found, a hyperbolicity is improved #BritGrav22

Georgios Antoniou is looking for stable scalarizaed black holes. @UoNMaths arxiv.org/abs/2204.01684 #BritGrav22

@mathsatshefuni Recording of George Montagnon (@mathsatshefuni) on Hartle-Hawking States on Extremal Black Hole Spacetimes youtu.be/4PGfUB9xtQQ The Boulware and Hartle-Hawking states do not coincide #BritGrav22

George Montagnon is a PhD student at @mathsatshefuni . He explains why it is interesting to study extremal black holes for quantum field theories. #BritGrav22

@QMcosmology Recording of David Peinador Veiga (@QMcosmology) on Double Copy Structures in Classical Spacetimes youtu.be/4RaMXoReuScType Type D and Type N spacetimes exhibit exhibit exact double copy relations #BritGrav22

David Peinador Veiga is a PhD student at @QMcosmology. He expains the double copy: Gravity = Gauge theory * Gauge theory. #BritGrav22

@QMULMaths Recording of @MarMinucci (@QMULMaths) on The Maxwell-scalar Field System Near Spatial Infinity youtu.be/RmHQim3qjm0 Nonlinear interaction makes fields more singular #BritGrav22

Marica Minucci is a PhD student at @QMULMaths. She is studying a Maxwell-scalar field at spatial infinity. #BritGrav22

@QMULMaths Recording of Mariem Magdy (@QMULMaths) on Asymptotic Charges for Spin-1 and Spin-2 Fields at the Critical Sets of Null Infinity youtu.be/4Yp-Za5otMc Asymptotic charges are well defined iff certain conditions are met for the initial hypersurface #BritGrav22

Mariem Magdy Ali Mohamed is a PhD student at @QMULMaths . She is studying asymptotic symmetries at null infinity. arxiv.org/abs/2112.03890 #BritGrav22

@QMULMaths Recording of Llibert Aresté Saló (@QMULMaths) on 3+1 Formulation of Einstein-scalar-Gauss-Bonnet Gravity youtu.be/nZpgSFzFnCo Black holes have been formed starting from Kerr initial data! #BritGrav22

Llibert Aresté Saló is a PhD student at @QMULMaths. He wants to solve Einstein–scalar–Gauss–Bonnet field equations numerically. #BritGrav22

@QMcosmology Recording of Ashim Sen Gupta (@QMcosmology) on Nonlinear Horndeski Analysis with HiCOLA youtu.be/4McU4if3PHE HiCOLA produces fast, approximate nonlinear matter power spectra #BritGrav22

Ashim Sen Gupta is analysing Horndeski gravity in comoving Lagrangian acceleration. This code enables tests with sureys like LSST @QMcosmology #BitGrav22

@UoN_Physics Recording of Chad Braddon (@UoN_Physics) on Using SELCIE to Investigate Screened Scalar Field Models Sourced by Complex Systems youtu.be/s5ODC0D25p8 The SELCIE code can be used to study gravity with chameleon effects #BritGrav22

Chad Braddon is a PhD student at @UoN_Physics. He is studying modified theories of gravity with a chamelon mechanism. The code SELCIE can solve gravitational fields in these nonlinear theories ascl.net/2110.019 #BritGrav22