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- W2904689917 abstract "We present Far-Infrared polarimetry observations of M82 at 53 and $154~mu rm{m}$ and NGC 253 at $89~mu rm{m}$, which were taken with HAWC+ in polarimetry mode on the Stratospheric Observatory for Infrared Astronomy (SOFIA). The polarization of M82 at $53~mu rm{m}$ clearly shows a magnetic field geometry perpendicular to the disk in the hot dust emission. For M82 the polarization at $154~mu rm{m}$ shows a combination of field geometry perpendicular to the disk in the nuclear region, but closer to parallel to the disk away from the nucleus. The fractional polarization at $53~mu rm{m}$ $(154~mu rm{m})$ ranges from 7% (3%) off nucleus to 0.5% (0.3%) near the nucleus. A simple interpretation of the observations of M82 invokes a massive polar outflow, dragging the field along, from a region $sim 700$~pc in diameter that has entrained some of the gas and dust, creating a vertical field geometry seen mostly in the hotter $(53~mu rm{m})$ dust emission. This outflow sits within a larger disk with a more typical planar geometry that more strongly contributes to the cooler $(154~mu rm{m})$ dust emission. For NGC 253, the polarization at $89~mu rm{m}$ is dominated by a planar geometry in the tilted disk, with weak indication of a vertical geometry above and below the plane from the nucleus. The polarization observations of NGC 253 at $53~mu rm{m}$ were of insufficient S/N for detailed analysis." @default.
- W2904689917 created "2018-12-22" @default.
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- W2904689917 date "2019-01-04" @default.
- W2904689917 modified "2023-10-02" @default.
- W2904689917 title "SOFIA Far-infrared Imaging Polarimetry of M82 and NGC 253: Exploring the Supergalactic Wind" @default.
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