Investigation 23 - Dark Matter APODs

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Feb 20, 2024

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Investigation 23 – APODs Picture 1 – Gamma Rays 1. What does this picture show? A space telescope imaging the center of our galaxy as gamma-rays. 2. What are the relevant physics displayed in this picture? Relevant physics being displayed is that this piece of matter is emitting waves of energy, which the space telescope could only process as gamma-rays. The interesting concept presented is that due to analysis, the matter is simply too bright to be matched with a known source of gamma rays. 3. How is this picture related to what we discussed today? What was discussed was that dark matter does not interact with electromagnetic radiation, meaning that it cannot be visibly bright to humans. There was also a mention of other exotic particles, which the article explains what this matter being described could be. It says it could a type of dark matter called WIMP. Video 2 – Bolshoi Simulation 1. What does this video show? This video shows a simulation that visualizes an accurate depiction of the dark matter distribution in the universe. 2. What are the relevant physics displayed in this video? The relevant physics displayed in this video is how 24% of all matter is dark matter and that there are unseen evolutions with dark matter just as there were with normal matter which created our seeable universe and ourselves. 3. How is this video related to what we discussed today? This video relates to the discussion of how there are things in the universe that we can’t see, and as this demo lines up with the observed magnetic attraction of dark matter within the universe, it shows how there is an entire whole part of the universe that we simply cannot see. Picture 3 – CL0024+17 1. What does this picture show? The picture shows an image from the Hubble space telescope that shows many galaxies with unusual repeated galaxies distant. 2. What are the relevant physics displayed in this picture? The relevant physics concept displayed in this picture is the idea that dark matter exists because of its gravitational effects on galaxies. Due to the plentiful faint blue galaxies in the

image depicted, scientists argued that these galaxies are organized in this way due to an unseeable ring of dark matter. 3. How is this picture related to what we discussed today? This picture is related to what was discussed because scientists took an unordinary depiction of galaxies and attempted to make a dark matter ring (which is known to be unseeable) visible to better understand how the galaxies are dispersed. Picture 4 – Finding Dark Matter 1. What does this picture show? The picture shown is 2d field survey of galaxies and apparent dark matter in our universe. The green square is more of a galaxy dispersed like ours and the red square is a densely packed cluster of galaxies 2. What are the relevant physics displayed in this picture? The relevant physics displayed is primarily in the red box. This is because it is showing a big cluster of galaxies with a dense amount of dark matter. This can be used to scientifically indicate that light and dark matter cluster together due to the gravitational pull of dark matter. 3. How is this picture related to what we discussed today? This picture relates because it shows some support to the idea of how dark matter is a gravitational force and actually influences the distribution of normal matter along the universe.

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