The Chandra Cygnus OB2 Survey

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Stars And Star Formation

Scientific paper

Understanding massive ``starburst'' clusters is crucial for the first stars, starburst galaxies, galactic nucleosynthesis, evolution and ISM mixing, and star and planet formation on universal and Galactic scales. But our few known Galactic superclusters are generally too distant for detailed study. Recent awareness that the 2Myr old Cygnus OB2 association, at only 1.5kpc, has supercluster characteristics, has prompted a large multiwavelength legacy effort exploiting its proximity to learn about starburst astrophysics. This Chandra legacy survey, approved for AO11, will provide an unprecendented vision of the anatomy of a massive, largely coherent mode of star formation, allowing detailed archeology of its history and content. 8000-10000 stars down to 0.5M_&sun; and beyond will be detected, providing large samples to test theories of giant molecular cloud collapse, massive starformation and protoplanetary disk evolution.

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