How Has the Maximum Intrinsic Brightness (Minimum Absolute Magnitude)of Type

question 303

Multiple Choice

How has the maximum intrinsic brightness (minimum absolute magnitude) of Type Ia supernovae been measured?

• A) The distances to nearby Type Ia supernovae have been measured using trigonometric parallax.
• B) Type Ia supernovae have been observed in distant galaxies in which Cepheid variables have also been observed.
• C) The brightnesses of Type Ia supernovae have been measured at several different wavelengths, from which their temperature and hence their intrinsic brightnesses can be calculated.
• D) The brightnesses of several Type Ia supernovae have been accurately measured relative to the brightnesses of the original stars before they exploded.

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