lec23_23nov2009

lec23_23nov2009 - outer solar system can also tell us about...

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Ge/Ay133 In what sort of region did our own solar system form?
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In what sort of environment did our own solar system form? In relative isolation (Taurus, Bok globules,…)?
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Or as part of a rich cluster (more likely)?
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terrestrial terrestrial One important set of clues:  Short-lived nuclides in meteorites Murchison Thin section (chondrules) CAIs
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Also need to worry about  spallation  (e.g.  14 C):
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Not just the minor elements/isotopes: Oxygen Supernova imprint? Would need ~1% “contamination”. E.D. Young et al.
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The dynamics of  small bodies  in the 
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Unformatted text preview: outer solar system can also tell us about the early environment in which planets were built. http://cfa-www.harvard.edu/cfa/ps/lists/OuterPlot.html The radiation environment can be quite harsh in clusters: Orion Proplyds For stars still accreting gas/dust, photoevaporation can dramatically shorten the disk lifetime: External photoevaporation scenario: 1.5 pc 1000AU green = H-alpha blue = [OIII] red = [SII] 3 pc 1000AU Must therefore consider environment in clusters!...
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This note was uploaded on 01/03/2012 for the course GEL 133 taught by Professor List during the Fall '10 term at Caltech.

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lec23_23nov2009 - outer solar system can also tell us about...

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