2008
DOI: 10.1088/0004-6256/136/2/621
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Near-Infrared Imaging Polarimetry of M42: Aperture Polarimetry of Point-Like Sources

Abstract: We have conducted aperture polarimetry of ∼500 stars of the Orion Nebula Cluster in M42 based on our widefield (∼8 ×8 ) JHKs-band polarimetry. Most of the near-infrared (NIR) polarizations are dichroic, with position angles of polarization agreeing, both globally and locally, with previous far-infrared (FIR) and submillimeter observations, having taken into account the 90• difference in angles between dichroic absorption and emission. This is consistent with the idea that both NIR dichroic polarizations and FI… Show more

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Cited by 21 publications
(28 citation statements)
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“…The line‐of‐sight field component can be determined from the Faraday rotation measure (Heiles et al 1981) for ionized gas or from Zeeman spectroscopy (Brogan & Troland 2001) for neutral/molecular gas. The plane‐of‐sky field components can be determined from the observations of polarized emission or absorption (Kusakabe et al 2008) from aligned spinning dust grains. In all of these techniques, the determination of B is not straightforward and relies on many auxiliary assumptions.…”
Section: Discussionmentioning
confidence: 99%
“…The line‐of‐sight field component can be determined from the Faraday rotation measure (Heiles et al 1981) for ionized gas or from Zeeman spectroscopy (Brogan & Troland 2001) for neutral/molecular gas. The plane‐of‐sky field components can be determined from the observations of polarized emission or absorption (Kusakabe et al 2008) from aligned spinning dust grains. In all of these techniques, the determination of B is not straightforward and relies on many auxiliary assumptions.…”
Section: Discussionmentioning
confidence: 99%
“…As Kusakabe et al (2008) mentioned, all of the observed near-IR polarizations are not originated by interstellar polarization, i.e., there are highly polarized sources that cannot be explained by interstellar origin, but by their circumstellar structures such as disks and envelopes. In order to exclude the point sources with large polarization degrees that are not considered to be of dichroic origin, we set an upper limit for the interstellar polarization.…”
Section: Photometry and Source Selectionmentioning
confidence: 95%
“…Therefore, there may exist an embedded bipolar cavity along the northwest to southeast (Minchin et al 1991). Interestingly, the central axis of the quadrupolar pattern or bipolar cavity appears to be aligned with the supposed direction of the magnetic field lines (Schleuning 1998;Kusakabe et al 2008).…”
Section: Observations and Data Reductionmentioning
confidence: 98%