RICAP-22 Roma International Conference on AstroParticle Physics

Session

Extra-Galactic sources

8 Sept 2022, 13:30

Aula Amaldi (Physics Department, University "La Sapienza", Roma, Italy)

Conveners

Extra-Galactic sources: - 1

• Elisa Prandini (University of Padova and INFN)
• Dario Gasparrini (Istituto Nazionale di Fisica Nucleare)

Extra-Galactic sources: - 2

• Elisa Prandini (University of Padova and INFN)
• Dario Gasparrini (Istituto Nazionale di Fisica Nucleare)

108. Extragalactic sources: phenomenology and open questions

Francesca Panessa (IAPS/INAF)

08/09/2022, 13:30

Active Galactic Nuclei have been historically divided into Radio-Loud and Radio-Quiet. I will discuss the most recent results on the main physical mechanisms acting in these two classes of sources and their contribution to the high energy emission.

69. The gamma-ray emission of Galaxy Outflows

Ajello Marco (Clemson University)

08/09/2022, 13:50

Galaxies display a variety of outflows, which are detected from near the central super-massive black hole to the entire host. These outflows are often powerful enough to unbind, if sustained over time, the gas of these galaxies. Propagating through the galaxy, the outflows should interact with the interstellar medium creating a strong shock, similar to those observed in supernovae explosions,...

58. VHE extragalactic results and perspectives from ground based instruments

Josefa Becerra González (Instituto de Astrofísica de Canarias)

08/09/2022, 14:10

The very high energy (VHE, E>100 GeV) extragalactic sky is being slowly populated, nowadays it is composed of around 90 targets. Blazars are clearly the dominant population, while some radio galaxies and gamma-ray bursts are spicing the study of the extreme Universe. The study of the intrinsic characteristics of their relativistic jets allow us to test extreme physical process, as well as can...

16. Gamma-ray and neutrino emissions from star-forming and starburst galaxies

Antonio Ambrosone (Istituto Nazionale di Fisica Nucleare)

08/09/2022, 14:30

Experimental observations have demonstrated a strong correlation between star-forming processes and gamma-ray luminosities. However, the very nature of these emissions is still under debate. Certainly, Star-forming and Starburst Galaxies (SFGs and SBGs) are well-motivated astrophysical candidates to emit gamma-rays and neutrinos, through hadronic collisions. In this talk, I will present...

96. KM3NeT/ARCA expectations for starburst galaxies observation

Walid Idrissi Ibnsalih (Istituto Nazionale di Fisica Nucleare)

08/09/2022, 14:50

On behalf of the KM3NeT Collaboration

In this contribution, we present the expectations of the full detector KM3NeT/ARCA for particular Starburst Galaxies signals, both as a diffuse signal and as point-like excess. To describe the diffuse flux, we use a recent theoretical model, also developed by some of the authors of this contribution, which implements a “blending” of spectral indexes to...

27. IXPE results for the extragalactic sky

Ioannis Liodakis (KIPAC, Stanford University)

08/09/2022, 16:00

X-ray polarization is a crucial probe of the magnetic field structure and emission processes in astrophysical systems. This is particularly true for active galactic nuclei (AGN). In radio-loud AGN, X-ray polarimetry allows us to investigate particle acceleration and composition in jets, while in radio-quiet AGN it allows us to look at matter under extreme conditions at the heart of the...

113. Unravelling the complex behaviour of our closest very-high-energy gamma-ray blazars, Mrk421 and Mrk501, through decades-long multi-instrument observations

David Paneque (Max Planck Institute for Physics)

08/09/2022, 16:20

Owing to their proximity and their intense broadband emission from radio to very-high-energy gamma rays, Mrk421 and Mrk501 are among the blazars that can be studied with the greatest level of detail; and hence one can use them as a sort of astrophysical laboratories to study the blazar's phenomena. Because of that, these two objects have been the focus of multiple extensive multi-instrument...

116. ET and the perspectives of GW detection

Antonino Chiummo (European Gravitational Observatory)

08/09/2022, 16:40

After the groundbreaking first detection of Gravitational Waves by the LIGO/Virgo Collaborations, the design of the third generation of gravitation wave interferometric antennas has gained a substantial interest and momentum. The Cosmic Explorer in the US and the European Einstein Telescope are the instruments which will take the legacy of the current generation and further advance the reach...