Astral magnetic fields-as observed in starforming nurseries, in stars, and in the Solar system

Details Astral magnetic fields-as observed in starforming nurseries, in stars, and in the Solar system Astral magnetic fields-as observed in starforming nurseries, in stars, and in the Solar system

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003newar..47...85v&link_type=abstract

New Astronomy Reviews, Volume 47, Issue 3, p. 85-168.

Astronomy and Astrophysics

Astronomy

21

Scientific paper

``Cherchez le champ magnétique'' is trendy in astronomy. The magnetic field takes the hourglass shape in gravitationally contracting young stellar objects, helically wraps up the jets of protostars, guides particles in stellar coronae, explodes in stellar flares, causes unrest in pulsar quakes and creates planetary aurorae. In stars and pulsars, dipolar dynamo magnetic fields play a dominant rôle in the gas dynamics. In planetary disks, the field is toroidal or archimedean spiral. Remanent magnetism is found in meteorites and asteroids. The astral magnetic fields can reach 1018 G in magnetars, dwarfing anything we can do on Earth in stable conditions (107 G) or in pulsed conditions (1010 G).
Magnetism plays a physical rôle in starforming clouds and its concomittent structures, from stellar nurseries to protostars, down to planets and asteroids. Starting with star-forming clouds (~10 pc=32 light-years=31×1016 m), this reviews covers protostellar systems (~1 cpc), circumstellar space (~1 mpc), masers, interplanetary space (~1 μpc), pulsars, stars, planets (~1 npc), asteroids (~30 km; ~1 ppc), and meteorites (~0.3 m; ~10 apc).

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