Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Near-Infrared Polarimetry of the Eagle Nebula (M16)   We carried out deep and wide (about 8' x 8') JHKs imaging polarimetry in the
southern region of the Eagle Nebula (M16). The polarization intensity map
reveals that two YSOs with near-IR reflection nebulae are located at the tips
of two famous molecular pillars (Pillars 1 and 2) facing toward the exciting
stars of M16. The centrosymmetric polarization pattern are consistent with
those around class I objects having circumstellar envelopes, confirming that
star formation is now taking place at the two tips of the pillars under the
influence of UV radiation from the exciting stars. Polarization measurements of
point sources show that magnetic fields are aligned along some of the pillars
but in a direction that is quite different to the global structure in M16.

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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: math-ph