Galaxies are collections of gas, stars, and dark matter held together by gravity. But how do galaxies, like our own Milky Way, change over their lives? Join us for a 30-minute lecture about galaxy evolution, followed by a panel Q&A consisting of several astrophysicists to answer your questions about astronomy and space science.
This public astronomy event will be hosted both in-person as well as live-streamed over YouTube Live. The lecture will be 30 minutes, followed by a 90-minute session of telescope-aided stargazing and a Q&A Panel consisting of experts in the department on a variety of astronomy and astrophysical topics. You can attend in person or interact with us through the YouTube interface. Event is free and open to all, no reservations necessary.
For more information including a link to the YouTube Livestream and directions to Caltech, click on the poster image or visit our webpage:
http://outreach.astro.caltech.edu
Title: Inside and Out: The Full Picture of Galaxy Evolution
Lecturer: Evan Nuñez
Abstract:
Galaxies are collections of gas, stars, and dark matter held together by gravity. Much like humans, galaxies grow and change over their lives, which span billions of years. One major way that galaxies can change is by forming new generations of stars from collapsed clouds of gas. Thus, to understand the life and evolution of a galaxy, we must fully account for all of its gas. This includes both gas (1) inside the galaxy where stars form and live, and (2) outside of the galaxy, in a sort of atmosphere surrounding the galaxy. But like the Earth's atmosphere, galactic atmospheres are nearly invisible and difficult to detect. In this talk, I will summarize our understanding of how galaxies evolve over their lives, and new observations that indicate the presence and importance of a galaxy's atmosphere.
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