Measure period 2 derive luminosity l 3 measure ux f

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Unformatted text preview: depends on ________ 3.  Type Ia supernovae – good rela8ve distances; ____ Standard rods: 1.  Dn- sigma - ellip8cals 2.  Maser disks in AGN – _____ ____ ; rare 3.  Cosmic microwave background fluctua8ons – only at ____ distance 4.  Baryon acous8c oscilla8ons – requires lots of data; __________ 4/23/2013 UW, ASTR 323, SP13, Eric Agol ©2013 6 Cepheid variables: Giant stars which pulsate with a _____ of a few days 4/23/2013 UW, ASTR 323, SP13, Eric Agol ©2013 7 The period of the pulsa8on gives the Cepheid luminosity 1.  Measure period 2.  Derive luminosity, L 3.  Measure flux, F 4.  Derive distance 4/23/2013 The luminosity of the observed star is ≈_____ L¤༊ UW, ASTR N23, SP13, Eric Agol ©2013 3 ov. 17, 2008 #8 Type Ia (white dwarf) Supernovae •  All have about the ____ lumino...
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This document was uploaded on 04/05/2014.

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