Summary: ASTR 3830: Problem Set 6
(due in class Friday April 30th)
1. For a source with a luminosity L, and measured flux (in some waveband) f, the
luminosity distance dL is defined as:

dL
L
4pf
Ê
Ë
Á
^
¯
~
1 2
.
(a) Type Ia supernovae are good standard candles, with an intrinsic luminosity that
corresponds to an absolute magnitude (in the blue) M = -19.6 mag. By using the above
definition of the luminosity distance, together with the definitions of the apparent
magnitude m [

Source: Armitage, Phil - Department of Astrophysical and Planetary Sciences, University of Colorado at Boulder

Collections: Physics