ASTRO 104 Quiz: Destination 5– Anti-Alpha Centauri
Document Summary
Destination 5: anti-alpha centauri: properties of the warm interstellar medium (ism) Temperature (t): 200 k (can vary from 100k-6000k) Other facts: dominated by neutral atoms, most common phase of ism by mass, detectable from radio 21 cm radiation emissions and absorptions: very hot, coronal ism. Hottest component of the ism: temperatures reach 1 million k: notation for ions. Neutral atoms: element i hi, oi, fei. Ionized atoms (lose 1 electrons): element ii hii, oii, feii. Twice-ionized atoms (lose 2 electrons): elements iii hiii, oiii, feiii etc: temperature and kinetic energy. Temperature: measure of kinetic energy (energy of motion) Kinetic energy=ergs; m=mass; v=velocity; k=boltzmann"s constant; t=temperature (k) k=1. 38x10^-16 ergs/k: feature of electromagnetic radiation. Particle-like properties: energy is carried away via radiation: e= h = ch/ . = e= (and vice versa: characteristics of a photon: Photon: particle of em radiation with no mass but a well-defined quantum of energy. Wave-particle duality: ties together e, , and of a photon.
