Astronomy 12 - Spring 1999 (S.T. Myers)

Equations and Constants for Final Exam


Last update: 26 April 1999


Constants:








Orbital Mechanics:




Electromagnetism, Light, and Atoms:




Intensity, Flux & Radiative Transfer:




Stellar Distances, Magnitudes, and Properties:




Binary Stars:



Note: you will need to know what an ellipse is, and what its semi-major axis and eccentricity are, and where its foci are.




Stellar Structure:




Atmospheres, Photospheres, & Thermodynamics:




Dust, Interstellar Medium & Star Formation:




Sound Waves and Pulsating Stars:




Relativity & Quantum Mechanics:




Galaxies, Quasars, and Clusters of Galaxies:




Cosmology:




Important Energy Thresholds:

Ionized Hydrogen 13.6 eV
mass of electron 511 KeV/c2
mass of proton 938 MeV/c2
mass of W,Z 90 GeV/c2



Solar Magnitudes:

  Mbol MV U - B B - V
Sun +4.76 +4.83 +0.16 +0.64



Characteristic Absolute Visual Magnitudes:

O and B stars +0 - -6
Classical Cepheid                  -0.5 - -6
Type II Cepheid +0 - -3
RR Lyrae Variable +0.5 - +1
Globular Cluster -5 - -9
Spiral Galaxy -15 - -21
Elliptical Galaxy -9 - -23
Irregular Galaxy -13 - -18
Type Ia Supernova   ~ -20
Type II Supernova   ~ -18



Common Elements and Isotopes:

(Key:   massnumX) 11H 42He 126C 147N
  168O 2010Ne 3216S 5626Fe



Solar Composition:

   X   =   H /     0.75       Y   =   He /     0.23       Z   =   met /     0.02   



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