Near-infrared circular polarimetry and correlation diagrams in the orion becklin-neugebauer/kleinman-low region

contribution of dichroic extinction

T. Fukue*, M. Tamura, R. Kandori, N. Kusakabe, J. H. Hough, P. W. Lucas, J. Bailey, D. C B Whittet, Y. Nakajima, J. Hashimoto, T. Nagata

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We present a deep circular polarization (CP) image of the Orion Becklin-Neugebauer (BN)/Kleinman-Low (KL) nebula in the Ks band and correlations of CP, linear polarization (LP), and H - Ks color representing extinction. The CP image clearly reveals the quadrupolar structure around the massive star IRc2, rather than BN. H - Ks color is well correlated with CP. A simple relation between dichroic extinction, color excess, CP, and LP is derived. The observed correlation between the Stokes parameters and the color excess agrees with the derived relation, and suggests a major contribution of dichroic extinction to the production of CP in this region, indicating the wide existence of aligned grains.

Original languageEnglish
JournalAstrophysical Journal
Volume692
Issue number2
DOIs
Publication statusPublished - 2009

Keywords

  • circumstellar matter
  • dust, extinction
  • infrared: stars
  • ISM: individual (Orion Kleinman-Low)
  • polarization
  • stars: formation

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