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Unformatted text preview: UCSB Winter 2008 Astro 1 - Homework #8 Solutions 3/14/08 1 a) Why is Iron very special in stellar evolution? b) Which elements are RARE and expensive because they aren’t produced in stars in large quantities? a) Iron is the heaviest element that can be created inside of a fusing star. It is also the element that accumulates in a stars core before a supernova. b) The rare elements are the ones heavier than iron, which are only created during a supernova. 2 a) Why do high-mass stars evolve differently than low mass stars? b) What type of event produced neutrinos that were detected on Earth? a) High mass stars simply get hotter which means that they can achieve fusion of heavier elements. Even though they live shorter main sequence lives than low mass stars, they go through more stages. The cutoff for stars that eventually reach supernova is 8 solar masses. b) High energy neutrinos, the kind that we are able to detect here on Earth are created during part of a supernova reaction (specifically when protons and electrons combine to form...
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This homework help was uploaded on 04/07/2008 for the course ASTRO 1 taught by Professor Antonucci during the Winter '08 term at UCSB.
- Winter '08