Did LIGO and Virgo observe dark matter?
Gr@v members co-author a paper in Physical Review Letters suggesting GW190521 may be a hint of a new dark matter particle.
High Energy Physics News & Events
Accretion of scalar hair onto black holes
Speaker
Jamie Bamber (University of Oxford)
Event date
Venue
online (only)
Event type
The behaviour of low mass scalar fields around black holes is of great interest in the context of dark matter models consisting of a massive scalar field (such as the axion) an
CIDMA Meeting 2021
The 2021 CIDMA meeting was held on January 21st 2021, online. Our group was represented by Felipe Freitas who discussed the applicability of machine learning techniques from particle physics and gravitational waves to medical applications. Watch here the talks of the 2021 CIDMA meeting.
The first results from Fermilab’s Muon g-2 experiment as a pathway for new physics
Speaker
António P. Morais (UA)
Event date
Venue
online (only)
Ends on
Event type
Discussion of the paper "Space-Time Approach to Quantum Electrodynamics" by R. P. Feynman
Speaker
Vasileios Vatellis (UA)
Event date
Venue
online (only)
Ends on
Event type
Space-Time Approach to Quantum Electrodynamics
R. P. Feynman
Phys. Rev. 76 (1949) 769
Neutron stars in screened modified gravity
Speaker
Alexandru Dima (SISSA, Trieste)
Event date
Venue
online (only)
Event type
Screened modified gravity is inherently elusive: screening mechanisms suppress the propagation of additional gravitational degrees of freedom in typical astrophysical scenarios, allowing these theories to avoid constraints coming from weak field observations.
Searching for ultralight bosons with black holes and gravitational waves: a status update
Speaker
Richard Brito (Sapienza University of Rome)
Event date
Venue
online (only)
Event type
Ultralight bosonic fields are compelling dark-matter candidates and arise in a variety of beyond-Standard-Model scenarios. These fields can tap energy and angular momentum from spinning black holes through superradiant instabilities, during which a macroscopic bosonic condensate develops around the black hole.
João Oliveira's Ph.D. defense
João Oliveira successfully defended his Ph.D. thesis on Friday 20th November 2020. The committee, presided by Prof. A. Botelho and composed by Profs. D. Astefanesi, M. Zilhão, M. Piedade Ramos, E. Radu and C. Herdeiro (advisor) unanimously approved the thesis entitled "Aspects of Einstein-Maxwell-scalar models: Solitons, Duality and Scalarisation". Congratulations João!
2020 SR&TD FCT Projects
The 2020 FCT call for Scientific Research & Technological Development projects had 5847 applications, of which 3317 were considered eligible and 312 recommended for funding. In the Physical Sciences panel there were 139 applications; Gr@v's project, led by C.Herdeiro, a synergy between the different expertise of the group (strong gravity, astrophysics and high energy physics) was ranked first.
New Gr@v research students
Four new research students have joined Gr@v this fall: Jenzhi Yang, Ivo Sengo, Vasileios Vatellis and João Pino. Welcome!