IRS Observations of the Double Helix Nebula

Details IRS Observations of the Double Helix Nebula IRS Observations of the Double Helix Nebula

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40983m&link_type=abstract

Spitzer Proposal ID #40983

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Scientific paper

We propose an IRS study of the Double Helix Nebula in the Galactic Center. This large-scale (30-pc) feature has been interpreted as a torsional Alfven wave driven by the rotation of the circumnuclear disk about the central black hole of the Galaxy. The cause of its infrared emission is likely to be thermal infrared emission by dust, but the mechanism by which the dust is organized into the observed helical structure is unknown. The proposed observations are aimed at learning as much as possible about the characteristics of the dust grains in this feature: their charge state, their size, and their temperature, in order to assess the hypothesis that the strong magnetic field at the Galactic center has played a role levitating the dust to its observed location, and ordering its morphology.

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