Oxygen isotope anomalies of the Sun and the original environment of the solar system |
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| Authors: | Jeong‐Eun LEE Edwin A BERGIN James R LYONS |
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| Institution: | 1. Department of Astronomy and Space Science, Astrophysical Research Center for the Structure and Evolution of the Cosmos, Sejong University, Seoul 143‐747, Korea;2. Physics and Astronomy Department, The University of California at Los Angeles, PAB, Box 951547, Los Angeles, California 90095‐1547, USA;3. Department of Astronomy, The University of Michigan, 500 Church Street, Ann Arbor, Michigan 48109‐10424;4. Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90095, USA;5. Department of Earth and Space Sciences, University of California, Los Angeles, California 90095, USA |
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| Abstract: | Abstract— 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 Δ17O 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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