Tübingen Einstein Seminar
C. Herdeiro was the invited speaker of the Tübingen Einstein seminar on April 16 2021.
Strong Gravity News & Events
Probing light axion-like particles with neutron star inspirals
Speaker
Jun Zhang (Imperial College, London)
Event date
Venue
online (only)
Event type
Despite of the weak couplings to normal matter, light axion fields can be significantly sourced by neutron stars, leaving potentially detectable signals in gravitational waves from binary neutron star inspirals. In this talk, I am going to talk about how the axions affect the inspiral waveform, and to report a recent search for such axions with GW170817.
Gravitational-wave imprints of non-integrable extreme-mass-ratio inspirals
Speaker
Kyriakos Destounis (University of Tübingen)
Event date
Venue
online (only)
Event type
Abstract: The detection of gravitational waves from extreme-mass-ratio inspirals (EMRIs) with upcoming space-borne detectors will allow for unprecedented tests of general relativity in the strong-field regime. Aside from assessing whether black holes are unequivocally described by the Kerr metric, they may place constraints on the degree of spacetime symmetry.
Black hole (de)scalarization in compact binaries
Speaker
Hector Silva (Max Planck Institute for Gravitational Physics)
Event date
Venue
online (only)
Event type
It was recently shown that a broad class of gravity theories allows for spontaneous scalarization of black holes, letting these objects grow “scalar hair” once certain conditions are met and to remain “bald” otherwise.
Discussion of the paper "An analytic representation for the quasi-normal modes of Kerr black holes" by E. W. Leaver
Speaker
Marco Brito (U. Minho)
Event date
Venue
online (only)
Ends on
Event type
An analytic representation for the quasi-normal modes of Kerr black holes
E. W. Leaver
Proc. Roy. Soc. Lond. A 402 (1985) 285-298
Discussion of the paper "Thermodynamics of Black Holes in Anti-de Sitter Space" by S. W. Hawking and D. N. Page
Speaker
João Novo (UA)
Event date
Venue
online (only)
Ends on
Event type
Thermodynamics of Black Holes in Anti-de Sitter Space
S. W. Hawking and D. N. Page
Commun. Math. Phys. 87 (1983) 577-588
One year Post-Doctoral Grant in High Energy Physics
A call for a 1 year postdoctoral grant in High Energy Physics, within the research grant “From Higgs phenomenology to the unification of fundamental interactions", PTDC / FIS-PAR / 31000/2017, is open from the 19th of April to the 14th of May 2021. See the eracareers announcement (in Portuguese and English) here.
A Nobel Prize for Black Holes
Celebrating the 2020 Physics Nobel Prize for Black Holes, here is an outreach article published in Gazeta de Física (published by the Portuguese Physics Society) by C. Herdeiro. The article pdf can be found in attachment.
Quasinormal modes and their connection to black hole shadow
Speaker
Huan Yang (Perimeter Institute for Theoretical Physics)
Event date
Venue
online (only)
Event type
In this talk I will first review a few intriguing properties of black hole quasinormal modes in the eikonal limit or in the near extremal limit (for the black hole). After that I will show how to relate quasinormal modes to the black hole shadows, and how to formulate a test for such relation.
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Introduction to computer vision with pyTorch
Gr@v member Felipe Freitas will lecture a free course on "Introduction to computer vision with pyTorch". Classes will take place on Fridays (the next class will be April 9th 2021) every two weeks, from 2:30 pm to 4:30 pm. More info below (in Portuguese).