Near-Infrared Polarimetry of the Eagle Nebula (M 16)

[摘要] Wecarriedoutdeepandwide($$sim$$8$$^{prime}imes^{prime}$$8)$$JHK_{ms}$$imagingpolarimetryinthesouthernregionoftheEagleNebula(M16).ThepolarizationintensitymaprevealsthattwoYSOswithnear-IRreflectionnebulaearelocatedatthetipsoftwofamousmolecularpillars(Pillars1and2)facingtowardtheexcitingstarsofM16.ThecentrosymmetricpolarizationpatternareconsistentwiththosearoundClassIobjectshavingcircumstellarenvelopes,confirmingthatstarformationisnowtakingplaceatthetwotipsofthepillarsundertheinfluenceofUVradiationfromtheexcitingstars.Polarizationmeasurementsofpointsourcesshowthatmagneticfieldsarealignedalongsomeofthepillars,butinadirectionthatisquitedifferenttotheglobalstructureinM16.

[学科分类] 天文学(综合)

[关键词] "infrared: stars";"ISM: individual objects (M 16)";polarization;"circumstellar matter";"stars: formation"