# Solar nebula magnetic fields recorded in the Semarkona meteorite

 Title: Solar nebula magnetic fields recorded in the Semarkona meteorite Author: Fu, R. R.; Weiss, B. P.; Lima, E. A.; Harrison, R. J.; Bai, X.-N.; Desch, S. J.; Ebel, D. S.; Suavet, C.; Wang, H.; Glenn, D.; Le Sage, D.; Kasama, T.; Walsworth, Ronald Lee; Kuan, A. T. Note: Order does not necessarily reflect citation order of authors. Citation: Fu, R. R., B. P. Weiss, E. A. Lima, R. J. Harrison, X.-N. Bai, S. J. Desch, D. S. Ebel, et al. 2014. “Solar Nebula Magnetic Fields Recorded in the Semarkona Meteorite.” Science 346 (6213) (November 13): 1089–1092. doi:10.1126/science.1258022. http://dx.doi.org/10.1126/science.1258022. Access Status: Full text of the requested work is not available in DASH at this time (“dark deposit”). For more information on dark deposits, see our FAQ. Full Text & Related Files: 34203424.pdf (956.9Kb; PDF) Abstract: Magnetic fields are proposed to have played a critical role in some of the most enigmatic processes of planetary formation by mediating the rapid accretion of disk material onto the central star and the formation of the first solids. However, there have been no experimental constraints on the intensity of these fields. Here we show that dusty olivine-bearing chondrules from the Semarkona meteorite were magnetized in a nebular field of 54 ± 21 microteslas. This intensity supports chondrule formation by nebular shocks or planetesimal collisions rather than by electric currents, the x-wind, or other mechanisms near the Sun. This implies that background magnetic fields in the terrestrial planet-forming region were likely 5 to 54 microteslas, which is sufficient to account for measured rates of mass and angular momentum transport in protoplanetary disks. Published Version: doi:10.1126/science.1258022 Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:32097106 Downloads of this work: