Editor's choice in "Universe"
The paper "EHT Constraint on the Ultralight Scalar Hair of the M87 Supermassive Black Hole" by P. Cunha, C. Herdeiro and E. Radu, was selected as one of the 2019 Editor's Choice of the journal Universe.
Astrophysics News & Events
UA Research Summit
The U. Aveiro Research Summit took place on 24-26 June 2020. Our group contribute with four student pitches (by A. Pombo, J. Delgado, L. Ventura and J. Oliveira). This year's edition of the Reseach@UA magazine included one Gr@v article as a 2019 reseach highlight and two Gr@v papers in the top 10 cited papers (2014-2019).
The gravitational spin Hall effect of light
Speaker
Marius Oancea, Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Potsdam, Germany
Event date
Venue
online
Event type
The propagation of electromagnetic waves in vacuum is often described within the geometrical optics approximation, which predicts that wave rays follow null geodesics. However, this model is valid only in the limit of infinitely high frequencies.
Gr@v webinars
Pandemia doesn't stop us! Gr@v webinars are the group's virtual meeting place, taking place every week. Interested collegues that wish to join may do so by contacting the group's scientific coordinator.
Light ring theorem covered by Phys.Org
The paper "Stationary black holes and light rings" recently published in PRL as editor's suggestion was covered by Phys.Org. Read here the story.
Two postdoctoral positions at CIDMA
CIDMA, the research unit Gr@v integrates, has annouced two one year postdoctoral positions starting in September 2020. Candidates should hold a Ph.D. in Mathematics or related areas (the scientific areas of Gr@v are elegible). The application period is May 14th-31st. More details can be found here and here.
Black holes with Proca hair/Spinning Proca stars
Here, the numerical data described in the paper "Black holes with synchronised Proca hair: linear clouds and fundamental non-linear solutions", arXiv:2004.09536 [gr-qc] [1], is made available for public use.
This data pertains the fundamental states (n=0) of these hairy black holes and spinning Proca stars. Some data for the excited states (n=1) was previously made available here.
Observational signatures from supermassive black hole mimickers
Speaker
Hector Olivares (Radboud University Nijmegen, Netherlands)
Event date
Venue
online
Event type
Advanced interferometric techniques as those employed in the Event Horizon Telescope (EHT) and GRAVITY recently allowed to study the environment of the two nearest supermassive black hole candidates at horizon-scale resoluton.
Visit of Nico Sanchis-Gual and seminar of Rodrigo Vicente
Nico Sanchis-Gual and Rodrigo Vicente, both based at IST-Lisbon, visited this week. Rodrigo delivered a seminar on "Moving black holes: Energy extraction, absorption cross section, and the ring of fire".
Seminar of Rodrigo Vicente
Rodrigo Vicente, based at IST-Lisbon, visited and delivered a seminar on "Moving black holes: Energy extraction, absorption cross section, and the ring of fire".