The Technique Called Photometry in Stellar Astronomy Is the Measurement

question 36

Multiple Choice

The technique called photometry in stellar astronomy is the measurement of the

• A) arrival times of photons from variable and pulsating stars to determine accurately the pulsation or rotation periods of these stars.
• B) intensity of light from stars through several limited-bandpass filters from which surface temperature, variability, luminosity, and so on of stars can be determined.
• C) relative absorption of light by different atoms and molecules in high-resolution spectra of starlight, from which stellar temperatures can be estimated.
• D) precise positions and relative motions of stars in the Galaxy, from which galactic structure and overall rotation can be determined.