Antonio Riotto (Geneva University)
Primordial Black Holes in the era of Gravitational Wave Astronomy
Friday, December 3rd, 2021, 11am – Giambiagi lecture hall (ICTP Adriatico GH) & streaming

Abstract The  discovery of a gravitational wave  signal coming from the merger of two black holes by the LIGO/Virgo collaboration  has initiated the new era of gravitational wave astronomy.  Primordialblack holes ( were immediately suggested to be responsible for such a signal  thus initiating aflourish research activity on the subject on which we will report the state of the art.

Contact: Matteo Biagetti
VideoSlidesAntonio Riotto’s webpage

Fiorenza Donato (Università di Torino)
Challenges in cosmic ray physics: galactic sources, antimatter, dark matter
Friday, November 19th, 2021, 4pm – Aula D (Old SISSA building) & streaming

Abstract The unprecedented precision of data cosmic rays and gamma rays challenges our understanding of the origin and of the behavior of cosmic rays in the Galaxy. We will discuss possible interpretations of the nuclear component, in terms of sources and propagation in the Galaxy. Special emphasis will be payed to the antimatter channels, where a possible contribution from dark matter annihilation has been argued. Finally, the leptonic component – both positrons and electrons – will be critically assessed in connection with the most recent gamma-ray observations from single Galactic sources.

Contact: Piero Ullio
VideoSlidesFiorenza Donato’s webpage

Marica Branchesi (Gran Sasso Science Institute)
Multi-messenger astronomy including gravitational-waves
Friday, October 29th, 2021, 11am – streaming

Abstract A new exploration of the Universe has recently started through multi-messenger observations including gravitational-waves. The detection of gravitational-waves and multi-wavelength electromagnetic emissions from a binary neutron star merger has demonstrated the enormous potential of multi-messenger astronomy to investigate the most energetic transients in the sky, probing relativistic astrophysics, nuclear physics, nucleosynthesis, and cosmology. The talk will give an overview of the astrophysical implications of gravitational-wave and multi-messenger observations, the prospects and challenges of the current and future gravitational-wave detectors, such as Einstein Telescope which is expected to undergo a revolution for transient (astro)physics.

Contact: Enrico Barausse
VideoSlidesMarica Branchesi’s webpage

John Miller (University of Oxford & SISSA)
Binary neutron star coalescence – after the merger
Friday, October 1st, 2021, 11am – Giambiagi lecture hall (ICTP Adriatico GH) & streaming

Abstract This talk will give an overview of current understanding of what happens after the coalescence of neutron star binaries, focussing on the particular case of the gravitational wave source GW170817.

Contact: Enrico Barausse
VideoSlidesJohn Miller‘s webpage

Pasquale Serpico (LAPTH, Annecy)
Massive sterile neutrinos in supernovae and the early Universe
Friday, September 17th, 2021, 11am – Kastler lecture hall (ICTP Adriatico GH) & streaming

Abstract After reviewing some motivation and the relevant parameter space, I will illustrate the impact of massive sterile neutrinos (tens or hundreds of MeV) on core collapse supernovae. An introduction to the topic of neutrinos in supernovae will be included for those unfamiliar with the relevant astrophysics. In particular, I will discuss constraints in the mass-mixing plane and interesting phenomenological signatures measurable at existing or forthcoming neutrino detectors. Cosmological probes (primordial nucleosynthesis, CMB) are also sensitive to some allowed parameter space. I will present recent calculations of the thermal decoupling of these states and the impact on the observables Neff  and Y. Current constraints and forecasts for the reach of the Stage-IV CMB observations will be discussed.

Contact: Piero Ullio, Emiliano Sefusatti
VideoSlidesPasquale Serpico‘s webpage