【日時】2月22日(水)　10:30～12:00
【場所】国立天文台・三鷹　中央棟（北）1階 講義室
【発表者（敬称略）】Sukom Amnart（総研大 D1・三鷹、指導教員 : 田村　元秀）
【タイトル】A Near-infrared Polarization Study of the BIP14 Bipolar Nebula
【アブストラクト】
We present new J(1.25um), H(1.63um) and Ks(2.15um) linear imaging polarimetric observations of bipolar nebula BIP14.
BIP 14 is excited by four stars of spectral types B0.5-A5 and has 3 lobes of nebulosity. The two bright lobes are bisected by a central dust lane (the dust disk) which is obviously identified in infrared observations. The polarization maps of two main lobes
show symmetric pattern about a single illuminating source in the main eastern lobe. The low polarization degrees of the main inner lobes (< 10 percent in J,H and Ks wavelengths) show this bipolar nebula is an combination of emission and reflection nebulosity . In addition, the position of trapezium stars in optical wavelengths, radio continuum observations and IRAS source are agreed with these infrared observations.