The Cosmic Web
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Transcript of The Cosmic Web
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The Cosmic WebBy Zoe Zontos
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Road Map•What is the cosmic web?• The importance of dark halos/matter• A visual glance of the cosmic web•What’s in our ‘neighborhood’?• Importance for future discoveries• Questions?• References
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The ‘cosmic web’ connects galaxies in the
cosmos.•What is the cosmic web?
• Distribution of galaxies is not random
• Background radiation reveals the ‘seeds’ for galaxy formation
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Dark halos contain the dark matter that
influences the cosmic web.
• Dark matter is the most dominant mass
• Develop the filaments that form cosmic connections
• Shapes of dark matter depends on gravity – turn out to be halos
• Scaling of clusters similar to scaling of galaxies
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The position of each element in the cosmic web are shown in the schematic diagrams below.
Source: http://www.astro.caltech.edu/~george/ay21/readings/local_cosmic_web.pdf
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Studying the cosmic web has led to discoveries in
our own ‘backyard’.• High-velocity clouds surround the Milky Way and Andromeda
• The Milky Way hosts a larger population of dwarf galaxies
• The Milky Way and Local Group are continuously accreting gas and evolving
• Galactic archaeology is being used to search for groups with a common origin
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Continuous new discoveries about the cosmic web will reveal more important information.
• GAIA experiment will map and measure the motions of over a billion stars to reunite dispersed stars from ancient accretion events
• Influx of information will reveal new data on the kinematics and detailed chemistry of billions of stars
• We get closer to understanding the origins of the Milky Way and Local Group galaxies and their connection to the cosmic web
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Questions?
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References• Ibata, Rodrigo A., and Geraint F. Lewis. "The Cosmic Web in Our
Own Backyard." Science 319 (n.d.): 50-52. 4 Jan. 2008. Web. 25 Feb. 2016.