day_18 - Reading Chapter 7 Chapter 8 Sections 8.1 8.2 8.5...

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Unformatted text preview: October 15, 2010 Reading Chapter 7, Chapter 8 - Sections 8.1, 8.2, 8.5, 8.6, 8.10, Chapter 9: all except 9.6.3, 9.6.4, (9.1 – 9.5.1 on third exam) Exam 3 Friday, October 22. Review Sheet Monday, review Thursday Astronomy in the News? Pic of the Day – star-forming region in Monoceros in the infrared Goal: To understand the nature of neutron stars with exceptionally large magnetic Felds. Soft Gamma Ray Repeaters- 6 known One Fared in the Large Magellanic Cloud galaxy, energy arrived in March 5, 1979. Another Fared in our Galaxy, energy arrived August 27, 1998, caused aurorae from 1000’s of light years away. Yet another Fared in our Galaxy with energy arriving December 27, 2004, from the far side of the Galactic center, perhaps 10’s of 1000’s of light years away, brightest release of energy ever seen in the Galaxy, 100 times more powerful than August 1998 burst. Magnetic eruption in neutron star [not necessarily in binary system.] Theory - break patch of iron-like “crust” of neutron star, convert magnetic energy to heat (1998 burst) or completely rearrange magnetic Feld conFguration (2004 burst)....
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day_18 - Reading Chapter 7 Chapter 8 Sections 8.1 8.2 8.5...

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