Program
Day 1, Monday, July 1st
Chair: Enrico Cannizzaro
08:00-09:00 Registration and coffee
09:00-09:10 Welcome from organization committee
09:10-10:10 Geraldine Servant: Gravitational waves from the primordial universe: scalar field cosmology, axions & dark matter
10:10-10:30 Coffee break
10:30-11:30 Katy Clough: Studying fundamental fields with numerical relativity
11:30-12:30 Sam Dolan: Superradiance
12:30 -14:00 Lunch
Chair: Yifan Chen
14:00-15:00 Geraldine Servant: Gravitational waves from the primordial universe: scalar field cosmology, axions & dark matter
15:00-16:00 Sam Dolan: Superradiance
16:00-16:30 Coffee break
16:30-17:30 Katy Clough: Studying fundamental fields with numerical relativity
17:30-18:00 Discussion with all speakers
18:00 reception on Monday
Day 2, Tuesday, July 2nd
Chair: Valentin Boyanov
09:00-10:00 Carlos Herdeiro: Black hole uniqueness and dirty black holes
10:00-10:30 Coffee break
10:30-11:30 Maria Alessandra Papa: Gravitational waves from monochromatic sources: data analysis
11:30-12:30 Francisco Duque: EMRIs or evolution of binaries in fundamental fields
12:30 -14:00 Lunch
Chair: Paolo Pani
14:00-15:00 Francisco Duque: EMRIs or evolution of binaries in fundamental fields
15:00-16:00 Maria Alessandra Papa: Gravitational waves from monochromatic sources: data analysis
16:00-16:30 Coffee break
16:30-17:30 Carlos Herdeiro: Black hole uniqueness and dirty black holes
17:30-18:00 Discussion with all speakers
Day 3, Wednesday, July 3rd
Chair: Xiao Xue
08:00-08:45 Registration and coffee
08:45-09:00 Welcome from organization committee
09:00-09:30 William East: Uncovering the signatures of black hole superradiance
09:30-10:00 Hidetoshi Omiya
10:00-10:30 Coffee break
10:30-11:00 Jamie McDonald
11:00-11:30 Diego Blas
11:30-12:30 Lightning talks + Poster session + voting (until end of day 4)
12:30 -14:30 Lunch
Chair: Vitor Cardoso
14:30-15:00 Ornella Piccinni
15:00-15:30 Hyungjin Kim
15:30-16:00 Coffee break (+ poster session)
16:00-16:30 Yue Zhao
16:30-17:00 Lam Hui
17:00-18:00 Discussion
Day 4, Thursday, July 4th
Chair: Richard Brito
09:00-09:30 Nicolas Sanchis-Gual: Dynamical bosonic stars and gravitational waves
09:30-10:00 Joshua Eby
10:00-10:30 Coffee break (+ poster session)
10:30-11:00 Pedro Cunha
11:00-11:30 Caio Macedo: Compact binaries in astrophysical environments
11:30-12:30 Discussion
12:30-14:30 Lunch
14:30-17:00 Specialized Topic Session
Miniworkshop on Gravitational Molecule
Day 5, Friday, July 5th
Chair: Thomas Spieksma
09:00-09:30 Arianna Foschi: Constraint the mass of boson clouds at the Galactic Center
09:30-10:00 Rodrigo Vicente
10:00-10:30 Coffee break
10:30-11:00 Andrea Maselli
11:00-11:30 Dina Traykova
11:30-12:30 Discussion+Poster winner + Farewell
Lectures:
- Katy Clough: Studying fundamental fields with numerical relativity
In this hands-on class we will try out the code engrenage (https://github.com/GRTLCollaboration/engrenage) which is a python based, spherically symmetric numerical relativity code with a dynamical gauge that is helpful for understanding the principles employed in larger 3+1D codes, but without many of the additional complexities of highly optimised code and without needing a supercomputer. Full background material for the code can be found in the wiki (https://github.com/GRTLCollaboration/engrenage/wiki) - I will not expect familiarity with this but it will certainly be useful if you take a look in advance.
Please do make sure you have an installation of python3 (I recommend Anaconda https://www.anaconda.com/download for new python users) and download and run the black hole example following the instructions in the wiki before the lecture. This process should take around half an hour if all goes smoothly, and the example should run in a minute or so. If you have any problems you can email me at k.clough@qmul.ac.uk to ask for advice.
In the class the goal will be to add a real scalar field to the black hole example, and see how it dynamically forms a distinctive profile (given analytically by the Heun functions) around the BH. If we have sufficient time, we can also try to add self interactions in the field and view their effects.
Workshop talks:
- William East: Uncovering the signatures of black hole superradiance
Black hole superradiance can be a powerful tool to look for new ultralight bosonic fields that may be weakly coupled to ordinary matter. In this talk, I will discuss the gravitational wave and--in some cases--electromagnetic signals that may arise when oscillating ultralight boson clouds develop through superradiance. I'll highlight some recent work to more accurately model the gravitational waveform from such sources, and to design new search methods targeting the black holes that form as remnants of compact object mergers.
- Arianna Foschi: Constraint the mass of boson clouds at the Galactic Center
The motion of S2, one of the stars closest to the Galactic Center (GC), has been measured accurately and used to study the compact object at the centre of the Milky Way. It is commonly accepted that this object is a supermassive black hole but the nature of its environment is open to discussion. In this talk I’m going to show how the motion of S2 can be used to investigate the possibility that dark matter in the form of an ultralight scalar field "cloud'' clusters around SgrA*. I will present some previous results on mass distribution at the GC, explain the theoretical setup, the tools used to fit the available data and finally the results and the constrains we can get from the Galactic Center on the mass of both scalar and vector clouds.
- Nicolas Sanchis-Gual: Dynamical bosonic stars and gravitational waves
Bosonic stars are theoretical exotic compact objects made of ultralight bosonic particles that could account for part of dark matter. In this talk, I will review some recent results on the stability and dynamical formation of these objects. Then I will talk about bosonic star mergers, the emission of gravitational waves, and what we could learn about them from a real gravitational wave event, if these objects exist in the Universe.
- Caio Macedo: Compact binaries in astrophysical environments
Compact binaries represent the primary focus of contemporary gravitational wave detectors. However, their evolution can significantly deviate from the conventional vacuum scenario when situated within various environments, such as dark matter or accretion disks. In this presentation, we explore the impacts of binaries immersed in a medium. Specifically, we examine the effects of dynamical friction and accretion on eccentricity and center of mass velocity. Additionally, we delve into potential relativistic consequences arising from binaries interacting with bosonic field environments.