Research Article

X-rays and Fluctuating X-Winds from Protostars

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Science  05 Sep 1997:
Vol. 277, Issue 5331, pp. 1475-1479
DOI: 10.1126/science.277.5331.1475

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Protostars emit more x-rays, hard and soft, than young sunlike stars in more advanced stages of formation. The x-ray emission becomes harder and stronger during flares. The excess x-rays may arise as a result of the time-dependent interaction of an accretion disk with the magnetosphere of the central star. Flares produced by such fluctuations have important implications for the x-wind model of protostellar jets, for the flash-heating of the chondrules found in chondritic meteorites, and for the production of short-lived radioactivities through the bombardment of primitive rocks by solar cosmic rays.

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