Direct detection of a magnetic field in the innermost regions of an accretion disk

Jean-François Donati (), Fréderic Paletou, Jérome Bouvier and Jonathan Ferreira
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Jean-François Donati: Observatoire Midi-Pyrénées
Fréderic Paletou: Observatoire Midi-Pyrénées
Jérome Bouvier: Université J. Fourier
Jonathan Ferreira: Université J. Fourier

Nature, 2005, vol. 438, issue 7067, 466-469

Abstract: Field patterns in Orion Accretion disks are important building blocks in astrophysics and are found in a wide range of contexts, around protostars in star-forming regions and around supermassive black holes at the centre of galaxies. Magnetic fields are supposedly a key ingredient of these disks, yet no direct observations of these fields have been available to constrain existing disk models near the critical central regions. A new spectrograph/spectropolarimeter called ESPaDOnS, fitted on a 3.6-metre telescope on Mauna Kea in Hawaii, has now filled this gap. It has been used to detect a magnetic field in the core of FU Orionis, a variable star near Orion's ‘shoulder’.

Date: 2005
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DOI: 10.1038/nature04253

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