ASTR 102 Lecture Notes - Lecture 4: Coma Supercluster, Parsec, Observable Universe
Document Summary
37755000 z = dlambda/lamda av. v = (3cz1+3cz2)/2. Resting lambda 2 = 3968 lamda 1 lamda 2 delta delta. Within the map of the universe, matter is arranged in clumps. These dots of matter represent galaxies, galaxies that are close enough to each other are affected by eachother"s gravity. Therefore forming local groups of galaxies, for example our milky. Way galaxy and andromeda galaxy are in a local group. Andromeda galaxy is actually moving towards our galaxy as it is in the local group. Q2: red circles on map show the galaxy clusters, the galaxy clusters only seem elongated due to the red shift of speci c galaxies in the cluster. For the redshift to occur, the galaxy must be moving down our line of sight. Q3: at right ascension of 13 hours and radial velocity of around 7000km/s, the coma supercluster exists. 7000/75 = distance (megaparsecs) = 93. 3 mpc distance(million light years) = 93. 3*(3. 26) = 304 million light years.
