Cosmic Explosions 2019

Session

Students' presentations

28 mai 2019, 18:00

Amphitheatre (Cargèse)

Présidents de session

Students' presentations: Senniappan, Smirnova, Scott, Verna, Weerasekara

• Volker Beckmann (CNRS / IN2P3)

62. N. Smirnova: 3D Simulations of Pair Instability Supernovae Explosions

Nina Smirnova (LAPTh)

28/05/2019 18:10

PISN is the explosions of supermassive, up to 1000 solar masses, stars of the III generation with low metallicity, which are on the cosmological distances from the Earth in the young universe. In present time there are not many publications exist on this topic what is explained by observational difficulties. These kinds of stars are unavailable for direct observations now, but the advanced...

61. M. Senniappan: Signal over Background discrimination for the ALTO observatory

Mohanraj Senniappan (Linnaeus University)

28/05/2019 18:20

ALTO is a future ground-based very high energy gamma-ray observatory based on water Cherenkov technique, which samples the secondary particles produced in the extensive air showers. This technique also provides long-term, continuous and wide field of view gamma-ray observations. Despite many advantages, the detection technique alone cannot determine the type of primary particle which gives...

63. S. Scott: The Follow-up of Cosmic Explosions with VERITAS

Skyler Scott (UCSC)

28/05/2019 18:30

Much can be learned about the particle acceleration and emission processes involved in cosmic explosions through the study of gamma rays in the very-high-energy (VHE; E > 100GeV) regime. Ground-based imaging atmospheric Cherenkov telescopes (IACTs), which are sensitive to VHE gamma-ray photons, therefore have much to contribute in the effort to characterize these transients. VERITAS, an IACT...

64. G. Verna: Searching for galactic PeVatrons with CTA

Gaia Verna

28/05/2019 18:40

One of the major scientific objectives of the future Cherenkov Telescope Array (CTA) Observatory is the search of PeVatrons. PeVatrons are the cosmic-ray factories able to accelerate nuclei at least up to the knee feature seen in the spectrum of Cosmic-Rays measured from Earth. CTA will perform a survey of the full Galactic plane at TeV energies and beyond with unprecedented sensitivity. The...

65. G. Weerasekara: The effect of peculiar motion of galaxies when calculating the gravitational lensing time delay

M. Gihan Weerasekara (University of Colombo)

28/05/2019 18:50

An intervening galaxy acts like a gravitational lens and produces multiple images of a single source such as a more remote galaxy. In such a scenario the source, the lens and the observer all have peculiar motions in any random direction in addition to the overall expansion of the universe due to the dark energy. There is a difference in light arriving times from images of a single source,...