Compact stars due to their enormous gravitational field can accumulate a sizable amount of dark matter in their interior. Depending on its nature, an accumulated dark matter may affect the properties of neutron stars in quite different ways. I will give an overview of the impact of dark matter on various observable properties of neutron stars, i.e.
I will present our recent work (arXiv:2204.13605[hep-ph]) based on a hybrid type-II seesaw/scotogenic model supplemented with a discrete flavour symmetry where Cp is dynamically generated by the vacuum.
The theory of General Relativity has successfully passed a large number of observational tests. The theory has been extensively tested in the weak-field regime with experiments in the Solar System and observations of binary pulsars.
In the 5th FCT individual contest for stimulous of research, Miguel Zilhão, Guilherme Raposo and Hector Olivares obtained 6 years research positions to join Gr@v.
In the paper "The fate of the light-ring instability" Gr@v members P. Cunha, C. Herdeiro and E. Radu, together with former member, currently at the U. Valencia, N. Sanchis-Gual, have unveiled the mystery of the fate of a large class of horizonless ultracompact objects, that could be potential black hole foils.
The project "Gravitational waves, black holes, and fundamental physics" led by M. Zilhão (co-PI C.Herdeiro), fully based at Aveiro U., was one of the six Scientific Research and Technological Development Projects selected for funding in the 2022 FCT Call for R&D projects in the Physics panel. All results can be seen here.
C. Herdeiro was the invited speaker for the Research Center of Gravitation at Lanzhou University, China, webinar on 27/7/2022.
Gr@v members J. Pino, V. Vatellis and A. Morais participated in the FLASY 2022 (Lisbon) and ICHEP 2022 (Bologna) international conferences with a total of 6 parallel and 1 plenary presentation.
Gr@v is one of the 126 groups/institutions that joined the European Consortium for Astroparticle Theory (EuCAPT). EuCAPT purpose is to bring together theoretical cosmologists and astroparticle physicists across Europe aiming at increasing the exchange of ideas, coordinate scientific activities, help in the attraction of adequate resources as well as promoting a stimulating, fair and open environment in which young scientists can thrive. Gr@v's participation is coordinated by A. Morais.