Ph 442: High Energy Astrophysics Fall 2011 Problem Set 2 1. Rosswog & Brggen problem 2.3 u
September 9, 2011 Due September 16, 2011
2. Thomson scattering is the elastic scattering between photons and
Consider a charge q which has always been at rest at the origin until time t = 0. The electric eld lines clearly point away from the origin in all directions. At t = 0 we brie y apply a uniform accele
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 3
September 17, 2011 Due September 23, 2011
1. Over the 0.110 keV band the total photoelectric cross-section for the interstellar medium (ISM), a
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 4
September 24, 2011 Due September 30, 2011
1. The energy loss rate for a minimum ionizing particle with charge z passing through many different
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 5 1. The Poisson distribution is given by this formula
October 1, 2011 Due October 7, 2011
n - e n! where P is the probability of exactly n occu
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 6 1. Rosswog & Brggen problem 3.3. u
October 8, 2011 Due October 15, 2011
2. Show that the number flux of photons per unit time per unit area per
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 7
October 14, 2011 Due October 21, 2011
1. Consider an electron traveling at speed v, Lorentz factor , past a nucleus with charge Z at an impact
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 8 1. Rosswog & Brggen problem 4.1 u
October 28, 2011 Due November 4, 2011
2. In this problem and the next one you will be exploring the way diffe
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 9
November 11, 2011 Due November 18, 2011
1. (a) The coupled rate equations that describe the time evolution of the ionization fractions Fi of an
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 10
November 26, 2011 Due December 2, 2011
1. (a) Rosswog & Brggen problem 2.4 u (b) Evaluate eqns. 2.134, 2.135, and 2.136 in the textbook for th
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 11
December 6, 2011 Due December 13, 2011
1. Determine the initial spin period of the Crab pulsar assuming a constant braking index n = 2.509 and
Ph 442: High Energy Astrophysics Fall 2011 Problem Set 1 1. Rosswog & Brggen problem 1.2 u 2. Rosswog & Brggen problem 1.10 u 3. Rosswog & Brggen problem 1.13 u
September 2, 2011 Due September 9, 2011
Potuisse impellit aliisque hae una. Referenda de facultate ha praestare inspiciam. Igni more uno
novi sine dum actu. Cau solum firma eos adhuc jam ipsum iii. Nec existimem perfectis hae
referebam agi