Boson stars are a remarkable type of self-gravitating soliton, which admits multipolar configurations. The simplest non-spherical stars, but still static, are the dipoles, but are they dynamically stable? In the paper "Self-interacting dipolar boson stars and their dynamics", it is shown self-interactions help make these dipoles dynamically robust.
Position: PhD Student
E-mail: jpmferreira@ua.pt
The 11th School on Astrophysics and Gravitation will take place at Instituto Superior Técnico in Lisbon, from 1-6 September 2023. C. Herdeiro and M. Zilhão are two of the lecturers. More info here.
At the end of June 2023 we have enjoyed the visits of Juan Carlos Degollado (UNAM - Mexico), Nico Sanchis Gual (Valencia - Spain) and Mikaela Carrasco (USFQ - Ecuador). Nine nationalities in this group photo taken on June 28 - science brings people together!
Our group organised the European Einstein Toolkit Meeting 2023, at the University of Aveiro, 19-23 June 2023. We had excellent speakers throughout the week, and everybody had a great time. Next year's meeting should be held in Amsterdam; hope to see everyone there!
A call for a 10 month researcher position within the project Testing the Kerr hypothesis with gravitational waves and lensing, PTDC/FIS-AST/3041/2020, is open until July 3rd 2023. The call in Portuguese and English is attached. The Euraxess link is here.
Within the NewFunFiCO network, coordinated by our group, we are co-organizing a workshop on fundamental fields and compact objects: new opportunities, at ICF - UNAM - Campus de Morelos, Mexico, from October 4-6 2023.
The Journées Relativistes de Tours, France, took place from 31 May - 2 June 2023 discussing the latest developments in the field. C. Herdeiro and E. Radu were two of the invited speakers.
A call for a 5-months research grant in Strong Gravity for M.Sc.
In this talk, I will give an overview of how to do field-level likelihood-free inference with galaxy catalogs.
More specifically, only using phase-space information, I will show how to convert galaxy catalogs into graphs.
I will explain how to use graph neural networks, associated with moment neural networks, to constrain Omega matter.