Display options
Cite
Gregori G, Ravasio A, Murphy CD, et al. Generation of scaled protogalactic seed magnetic fields in laser-produced shock waves. Nature. 2012;481(7382):480-3doi: 10.1038/nature10747.
Gregori, G., Ravasio, A., Murphy, C. D., Schaar, K., Baird, A., Bell, A. R., Benuzzi-Mounaix, A., Bingham, R., Constantin, C., Drake, R. P., Edwards, M., Everson, E. T., Gregory, C. D., Kuramitsu, Y., Lau, W., Mithen, J., Niemann, C., Park, H. S., Remington, B. A., Reville, B., Robinson, A. P., Ryutov, D. D., Sakawa, Y., Yang, S., Woolsey, N. C., Koenig, M., & Miniati, F. (2012). Generation of scaled protogalactic seed magnetic fields in laser-produced shock waves. Nature, 481(7382), 480-3. https://doi.org/10.1038/nature10747
Gregori, G, et al. "Generation of scaled protogalactic seed magnetic fields in laser-produced shock waves." Nature vol. 481,7382 (2012): 480-3. doi: https://doi.org/10.1038/nature10747
Gregori G, Ravasio A, Murphy CD, Schaar K, Baird A, Bell AR, Benuzzi-Mounaix A, Bingham R, Constantin C, Drake RP, Edwards M, Everson ET, Gregory CD, Kuramitsu Y, Lau W, Mithen J, Niemann C, Park HS, Remington BA, Reville B, Robinson AP, Ryutov DD, Sakawa Y, Yang S, Woolsey NC, Koenig M, Miniati F. Generation of scaled protogalactic seed magnetic fields in laser-produced shock waves. Nature. 2012 Jan 25;481(7382):480-3. doi: 10.1038/nature10747. PMID: 22281596.
Copy Download .nbib Format: NLM
Share it on

Nature. 2012 Jan 25;481(7382):480-3. doi: 10.1038/nature10747.

Generation of scaled protogalactic seed magnetic fields in laser-produced shock waves.

Nature

G Gregori, A Ravasio, C D Murphy, K Schaar, A Baird, A R Bell, A Benuzzi-Mounaix, R Bingham, C Constantin, R P Drake, M Edwards, E T Everson, C D Gregory, Y Kuramitsu, W Lau, J Mithen, C Niemann, H-S Park, B A Remington, B Reville, A P L Robinson, D D Ryutov, Y Sakawa, S Yang, N C Woolsey, M Koenig, F Miniati

Affiliations

  1. Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK. [email protected]

PMID: 22281596 DOI: 10.1038/nature10747

Abstract

The standard model for the origin of galactic magnetic fields is through the amplification of seed fields via dynamo or turbulent processes to the level consistent with present observations. Although other mechanisms may also operate, currents from misaligned pressure and temperature gradients (the Biermann battery process) inevitably accompany the formation of galaxies in the absence of a primordial field. Driven by geometrical asymmetries in shocks associated with the collapse of protogalactic structures, the Biermann battery is believed to generate tiny seed fields to a level of about 10(-21) gauss (refs 7, 8). With the advent of high-power laser systems in the past two decades, a new area of research has opened in which, using simple scaling relations, astrophysical environments can effectively be reproduced in the laboratory. Here we report the results of an experiment that produced seed magnetic fields by the Biermann battery effect. We show that these results can be scaled to the intergalactic medium, where turbulence, acting on timescales of around 700 million years, can amplify the seed fields sufficiently to affect galaxy evolution.

References

  1. Phys Rev Lett. 2003 Jul 18;91(3):035003 - PubMed
  2. Rev Sci Instrum. 2009 Nov;80(11):113505 - PubMed
  3. Science. 2008 May 16;320(5878):909-12 - PubMed
  4. Phys Rev Lett. 2000 May 22;84(21):4846-9 - PubMed
  5. Nature. 2008 Jul 17;454(7202):302-4 - PubMed

Publication Types