Oxygen isotope anomalies of the Sun and the original environment of the Solar system

Details Oxygen isotope anomalies of the Sun and the original environment of the Solar system Oxygen isotope anomalies of the Sun and the original environment of the Solar system

2008-03-05

arxiv.org/abs/0803.0692v3

Astronomy and Astrophysics

Astrophysics

27 pages, 10 figures. Accepted for publication in M&PS, typos corrected

Scientific paper

We present results from a model of oxygen isotopic anomaly production through selective photodissociation of CO within the collapsing proto-Solar cloud. Our model produces a proto-Sun with a wide range of Delta_17O values depending on the intensity of the ultraviolet radiation field. Dramatically different results from two recent Solar wind oxygen isotope measurements indicate that a variety of compositions remain possible for the solar oxygen isotope composition. However, constrained by other measurements from comets and meteorites, our models imply the birth of the Sun in a stellar cluster with an enhanced radiation field and are therefore consistent with a supernova source for 60Fe in meteorites.

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