Wśród prelegentów 40. Zjazdu Polskiego Towarzystwa Astronomicznego wystąpienia będzie miało kilku laureatów Nagrody Nobla.
prof. Reinhard Genzel
(Max Planck Institute for Extraterrestrial Physics)
Laureat Nagrody Nobla w dziedzinie fizyki w 2020 roku za odkrycie supermasywnego zwartego obiektu w centrum naszej galaktyki
Prelekcja: 14 września 2021 r., 9.00-9.40, A 40-year journey
More than one hundred years ago, Albert Einstein published his Theory of General Relativity (GR). One year later, Karl Schwarzschild solved the GR equations for a non-rotating, spherical mass distribution; if this mass is sufficiently compact, even light cannot escape from within the so called event horizon, and there is a mass singularity at the center. The theoretical concept of a 'black hole' was born, and was refined in the next decades by work of Penrose, Wheeler, Kerr, Hawking and many others. First indirect evidence for the existence of such black holes in our Universe came from observations of compact X-ray binaries and distant luminous quasars. I will discuss the forty year journey, which my colleagues and I have been undertaking to study the mass distribution in the Center of our Milky Way from ever more precise, long term studies of the motions of gas and stars as test particles of the space time. These studies show the existence of a four million solar mass object, which must be a single massive black hole, beyond any reasonable doubt.
prof. Barry C. Barish
(Caltech and UC Riverside)
Laureat Nagrody Nobla w dziedzinie fizyki w 2017 roku za decydujący wkład w detektor LIGO i obserwacje fal grawitacyjnych
Prelekcja: 16 września 2021 r., 17.20 – 18.00, Understanding our Universe with Gravitational Waves
The discovery of gravitational waves, predicted by Einstein in 1916, is enabling both important tests of the theory of general relativity, and the birth of a new astronomy. Modern astronomy, using all types of electromagnetic radiation, is giving us an amazing understanding of the complexities of the universe, and how it has evolved. Now, gravitational waves and neutrinos are beginning to give us the opportunity to pursue some of the same astrophysical phenomena in very different ways, as well as to observe phenomena that cannot be studied with electromagnetic radiation. The detection of gravitational waves and the emergence and prospects for this exciting new science will be explored.
prof. Didier Queloz
(Cavendish Laboratory, University of Cambridge)
Laureat Nagrody Nobla w dziedzinie fizyki w 2019 roku za odkrycie egzoplanety krążącej wokół gwiazdy typu słonecznego
Prelekcja: 17 września 2021 r., 10.30 – 11.10, The Exoplanet revolution
The wealth and diversity of planetary systems that have now been detected modified our perspective on planet formation as a whole and more specifically our place in the Univers. It also present an opportunity of historical perspectives and an irresistible call to look for signs of life on these new worlds as a way to explore our own origins. I will introduce the audience with the challenges and recent progresses in this new field of research and will touch upon the emergence of a new paradigm for the origins of life on Earth.