Dark Matter

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CONTENTS OF UNIVERSE •“Ordinary” matter: ~ 4.4% •Ordinary matter inside stars: ~ 0.6% •Ordinary matter outside stars: ~ 3.8% •<strong>Dark</strong> matter: ~ 23% •<strong>Dark</strong> energy ~ 73% Tuesday, March 12, 13 32
WHAT IS THE EVIDENCE FOR DARK MATTER IN GALAXIES Tuesday, March 12, 13 33
Page 1 and 2: ASTR 115 03/12/13 “Why does a vol
Page 3 and 4: SCHEDULE CHANGES •The extra credi
Page 5 and 6: If the center of a galaxy is unusua
Page 7 and 8: The highly redshifted spectra of qu
Page 9 and 10: THOUGHT QUESTION What can you concl
Page 11 and 12: Quasars powerfully radiate energy o
Page 13 and 14: The lobes of radio galaxies can ext
Page 15 and 16: Radio galaxies don’t appear as qu
Page 17 and 18: WHAT IS THE POWER SOURCE FOR QUASAR
Page 19 and 20: ENERGY FROM A BLACK HOLE •Gravita
Page 21 and 22: DO SUPERMASSIVE BLACK HOLES REALLY
Page 23 and 24: The orbital speed and distance of g
Page 25 and 26: GALAXIES AND BLACK HOLES •The mas
Page 27 and 28: HOW DO QUASARS LET US STUDY GAS BET
Page 29 and 30: CHAPTER 22 DARK MATTER, DARK ENERGY
Page 31: UNSEEN INFLUENCES Dark Matter: An u
Page 35 and 36: Rotation curve A plot of orbital ve
Page 37 and 38: Who has the largest orbital velocit
Page 39 and 40: The rotation curve of the Milky Way
Page 41 and 42: Mass within the Sun’s orbit: 1.0
Page 43 and 44: We can measure the rotation curves
Page 45 and 46: Broadening of spectral lines in ell
Page 47 and 48: THOUGHT QUESTION What would you con
Page 49 and 50: We can measure the velocities of ga
Page 51 and 52: Clusters contain large amounts of X
Page 53 and 54: Tuesday, March 12, 13 53
Page 55 and 56: THOUGHT QUESTION What kind of measu
Page 57 and 58: DOES DARK MATTER REALLY EXIST Inser
Page 59 and 60: OUR OPTIONS 1. Dark matter really e
Page 61 and 62: WHAT MIGHT DARK MATTER BE MADE OF T
Page 63 and 64: TWO BASIC OPTIONS •Ordinary Dark
Page 65 and 66: MACHOs occasionally make other star
Page 67 and 68: WHAT IS THE ROLE OF DARK MATTER IN
Page 69 and 70: Insert TCP 6e Figure 22.2 WIMPs can
Page 71 and 72: WHAT ARE THE LARGEST STRUCTURES IN
Page 73 and 74: Time in billions of years 0.5 2.2 5
Page 75 and 76: Structures in galaxy maps look very
Page 77 and 78: http://apod.nasa.gov/apod/ap070827.
Page 79 and 80: Does the universe have enough kinet
Page 81 and 82: Since the amount of dark matter is
Page 83 and 84:
Estimated age depends on the amount
Page 85 and 86:
THOUGHT QUESTION Suppose that the u
Page 87 and 88:
Insert TCP 6e Figure 20.14 The brig
Page 89 and 90:
http://apod.nasa.gov/apod/ap071021.
Page 91 and 92:
IN NO PARTICULAR ORDER (IGNORING HU
Page 93 and 94:
SUPER VOLCANOS •A super volcano e
Page 95 and 96:
GAMMA-RAY BURST •To see a gamma-r
Page 97 and 98:
EARTH’S MAGNETIC FIELD FLIPPING
Page 99 and 100:
SUN HEATING UP •Regardless of all
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Dark Matter

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