dark matter and dark energy (1)
TRANSCRIPT
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By: Alejandro Cano, Dani Martínez, Sergio Núñez &
Carmen Barbero
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• Gravity has an important role in this theme
• As you all know, gravity is the force of attraction that we feel when we are near of an astronomical object
• This was described by Sir. Isaac Newton in the Laws of Universal Gravitation
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• It does not interact with electromagnetic spectrum.
• It is not visible but the amount of it in the universe is much bigger than the amount of matter that is visible
• Matter visible are planets, stars, galaxies..• The only explanation for its existance is the
gravitational pull.
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• Appreciated in spiral galaxies
• Stars at the center should rotate at a higher speed than the ones outside
• The speed is mostly the same
• As a conclusion the ones outside are feeling a gravitational pull.
Gravitational Pull
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• If we look to one of this we can see that there is 10 times more mass than the one we can account for
• Coma Galaxy Cluster is one example
• In this clusters we can see that it always remains the same but galaxies move at high speed
Galaxy Clusters
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• Mass• Orbital speed
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• Coma Cluster
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• GALAXY-GALAXY CLUSTER-OBSERVER
• Einstein´s ring
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• Opposite effect:Negative pressure; repulsion of matter.
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Expectation: slowing down, GRAVITY WINS!
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Expectation: slowing down, GRAVITY WINS!
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Space´s expansion is accelerating
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Galaxies!
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• Euclid space mission:Euclid space mission: measure the expanding universe’s acceleration.
• Fermi Gamma-ray Space Telescope:Fermi Gamma-ray Space Telescope: gamma-ray observations from low Earth orbit.
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• Large Hadron Collider (LHC):Large Hadron Collider (LHC): it might produce dark matter particles. It’s only evidence would be its missing energy.
• CDMS (Cryogenic Dark Matter Search): CDMS (Cryogenic Dark Matter Search): detect particle dark matter in the form of WIMPs (weakly interactive massive particles).
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