Hvězdy v jádře naší Galaxie a na konferenci MODEST 17 v Praze
Typ akce: Přednáška
Termín konání akce: 21.09.2017 od 19:30 do 21:00
Abstrakt přednášky v anglickém jazyce:
The Stellar Zoo at the center of our Milky Way Galaxy would be quite unfamiliar to a terrestrial visitor. Not only do the types of stars differ in many ways from what we can see in our serene nighttime sky from Earth, but the stars at the galactic center are also not behaving like the stars around us. They are densely packed in and are speeding around the central black hole at enormous speeds, sometimes colliding catastrophically with each other. Even the formation process of stars at the center tends to occur in spectacular cataclysmic events. This lecture will reveal how the world's largest telescopes and their powerful infrared instruments are being used to follow the lives of stars in this unique region. The story will include the short, but exciting lifetimes of the most massive stars, and what happens to their remnants after those stars explode as supernovae. Red giant stars are also an interesting part of the story, as they are big targets for stellar impacts, so their lives can be cut short by collisions. This lecture will also describe the remarkable things that can happen to binary star systems, as well as the fireworks that ensue when a star or a planet happens to meet the Galaxy's central black hole.