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Lecture 5: Observation, (for galaxies:, • stellar population • ISM /…
Lecture 5: Observation
Measure Properties of Astronomical Objects
Properties of Astronomical Objects
position & motion
Buildacatalogofreferencestars. a. observe, transform, log, repeat! b. evolvinglogintocurrettime
Locatestarsinframe.
Transformfromx-ytoRA-Dec.
Pingdownotherstars.
Motion – proper motion and RV
line width
mass
gravity and rotation
size/morphology
luminosity
temperature
age
environment
composition
atomic / metallicity o molecular
structure
magnetic field
components
Distances
Quantify Measurements
for galaxies:
• stellar population • ISM / gas+dust
• dark matter
• central blackhole