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Ge/Ay133

In what sort of region did our own solar system form?. Ge/Ay133. In relative isolation (Taurus, Bok globules,…)?. In what sort of environment did our own solar system form?. Or as part of a rich cluster (more likely)?. One important set of clues: Short-lived nuclides in meteorites.

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Ge/Ay133

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  1. In what sort of region did our own solar system form? Ge/Ay133

  2. In relative isolation (Taurus, Bok globules,…)? In what sort of environment did our own solar system form?

  3. Or as part of a rich cluster (more likely)?

  4. One important set of clues: Short-lived nuclides in meteorites Murchison CAIs terrestrial terrestrial Thin section (chondrules)

  5. Also need to worry about spallation (e.g. 14C):

  6. Not just the minor elements/isotopes: Oxygen Supernova imprint? Would need ~1% “contamination”. E.D. Young et al.

  7. The dynamics of small bodies in the 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

  8. The radiation environment can be quite harsh in clusters: Orion Proplyds

  9. For stars still accreting gas/dust, photoevaporation can dramatically shorten the disk lifetime:

  10. External photoevaporation scenario:

  11. green = H-alpha blue = [OIII] red = [SII] 1000AU 1.5 pc

  12. 1000AU 3 pc

  13. Must therefore consider environment in clusters!

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