Семінар відділу астрофізики та елементарних частинок
Семінар відділу астрофізики та елементарних частинок
відбудеться 14 січня 2019 р. о 1400 к. 221

Volodymyr Savchenko
Département d’Astronomie, Université de Genève

Elusive short and energetic multi-messenger transients
Recent years were marked by accelerated development of time domain astronomy, owing to the evolution of observational techniques in wide-field rapid optical and radio surveys, as well as development of the computing resources and methods necessary to promptly interpret overwhelmingly rich observational data. In addition, gravitational waves and neutrino observatories finally reached a degree of maturity that has enabled breakthrough multi-messenger observations of previously undetected fundamental physical processes in space.
The properties or even the very nature of many of the new classes of transient sources remain obscure: they are typically associated with peculiar supernovae, mergers of compact objects, or tidal disruption events. In order to decipher the complex physical processes at play in these exceptional systems, it is vital to combine exhaustive and diverse observations. Among the most interesting, and yet the most challenging is the observation of the hard X-ray and gamma-ray emission: it often reveals a distinct emission component that points to the most dense and energetic regions at the heart of the source.
In this talk, I will discuss how recent contributions of INTEGRAL observatory to pioneering multi-messenger observations help to reveal mechanisms at the core of the merging compact objects, collapsing massive stars, and tidal disruption events. I will review some of the implications of these observations for production of heavy elements, cosmology, and fundamental physics.
Finally, I will review how the recent discoveries in the domain of multi-messenger transients were made possible by a global effort to achieve a new degree of automation and interoperability. In particular, I will present the Online Data Analysis (ODA) platform, developed at Common Data Center Infrasture of UniGE facilities to facilitate reduction and analytics of astronomical data, and review some of the ongoing projects and future plans for consolidating and designing scientific data analysis workflows in the distributed environment.