Lecture 5 Review: Observations
Direct Measurement
Indirect Measurement
Position(RA and DEC)
Distance
Temperature
Mass
Size
Age
Known stars
Transform from x-y in palte to RA-DEC
Motion
Radial velocity/Rotation: red/bule shift
Trangential velocity: angle change
Gravity
Keppler's third law
Virial theorem
Effective termperature
Ionization temperature
Infer from flux and blackbody radiation
Use planet transits
Color temperature
Composition
Elements
Spectrum analysis
Magnetic filed
Dark matter
Central blackhole
Trigonometry
Anchors
Measured brightness and infered lunimosity from periods
Distance ladder
Statistics
Mesurement
Poisson process
Errors
SNR
Maximum likelihood estimation