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Paper: Wide-Field Near-Infrared Polarimetry of the Rho Ophiuchi Core: Magnetic Field Structures
Volume: 449, Astronomical Polarimetry 2008: Science from Small to Large Telescopes
Page: 207
Authors: Tamura, M.; Hashimoto, J.; Kandori, R.; Kusakabe, N.; Nakajima, Y.; Saito, H.; Nishiyama, S.; Hatano, H.; Sato, Y.; Fukue, T.; Nagata, T.; Sato, S.; Hough, J.; IRSF/SIRIUS Team
Abstract: We conducted wide and deep {JHKs}-band simultaneous imaging polarimetry toward the ρ Oph cloud core. Aperture polarimetry in the H-band was made toward about 600 sources, which successfully revealed the magnetic field structures in the core region up to at least AV ∼ 60 mag. There is a positive correlation between P(H) and H–Ks up to H–Ks ≈ 4.5. The field structures are unambiguously defined in each subregion of Cores A, B, and E/F. Comparing with the large-scale field structures obtained with the optical polarimetry, we suggest that the magnetic field structures in the core were distorted by the cluster formation in this region, which might have been induced by a shock compression by wind/radiation from the Sco OB2 association.
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