{"id":103,"date":"2011-10-31T10:04:10","date_gmt":"2011-10-31T01:04:10","guid":{"rendered":"http:\/\/guas-astronomy.jp\/weblog2\/?p=103"},"modified":"2011-10-31T10:04:10","modified_gmt":"2011-10-31T01:04:10","slug":"linear_and_circular_imaging_po","status":"publish","type":"post","link":"https:\/\/guas-astronomy.jp\/weblog\/?p=103","title":{"rendered":"Linear and circular imaging polarimetry of the Chamaeleon infrared nebula"},"content":{"rendered":"<p>\u3010\u65e5\u6642\u301111\u67082\u65e5(\u6c34)\u300010:30\uff5e12:00<br \/>\n\u3010\u5834\u6240\u3011\u56fd\u7acb\u5929\u6587\u53f0\u30fb\u4e09\u9df9\u3000\u4e2d\u592e\u68df\uff08\u5317\uff091\u968e \u8b1b\u7fa9\u5ba4<br \/>\n\u3010\u767a\u8868\u8005\uff08\u656c\u79f0\u7565\uff09\u3011Kwon Jungmi\uff08\u7dcf\u7814\u5927 D2\u30fb\u4e09\u9df9\u3001\u6307\u5c0e\u6559\u54e1 : \u7530\u6751 \u5143\u79c0\uff09<br \/>\n\u3010\u30bf\u30a4\u30c8\u30eb\u3011Linear and circular imaging polarimetry of the Chamaeleon infrared nebula<br \/>\nABSTRACT ( Gledhill et al. 1996 )<br \/>\nWe present linear and circular imaging polarimetry observations of the Chamaeleon infrared nebula, a bipolar reflection nebula in the Chamaeleon I dark cloud, at near-infrared (JHKn) wavelengths.<br \/>\nThese are amongst the first imaging circular polarimetry results for a star-forming region. The detection of both high degrees of linear polarization and a significant degree of circular polarization in the extended nebulosity allows us to comment on the scattering geometry and the range of particle sizes present.<br \/>\nWe develop a model incorporating a polarized source which can successfully account for the observed linear and circular polarimetry and for the asymmetries in nebular brightness (the &#8216;bright rim&#8217; structures) seen in this and other objects (e.g., NGC 2261\/R Mon). In order to do so, the model requires a non-axisymmetric illumination of the nebula, and we discuss possible origins for this asymmetry, including disruption of a circumstellar disc by binary protostars.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3010\u65e5\u6642\u301111\u67082\u65e5(\u6c34)\u300010:30\uff5e12:00 \u3010\u5834\u6240\u3011\u56fd\u7acb\u5929\u6587\u53f0\u30fb\u4e09\u9df9\u3000\u4e2d\u592e\u68df\uff08\u5317\uff091\u968e \u8b1b\u7fa9\u5ba4 \u3010\u767a\u8868\u8005\uff08\u656c\u79f0\u7565\uff09\u3011Kwon Jungmi\uff08\u7dcf\u7814\u5927 D2\u30fb\u4e09\u9df9\u3001\u6307\u5c0e\u6559\u54e1 : \u7530\u6751 \u5143\u79c0\uff09 \u3010\u30bf\u30a4\u30c8\u30eb\u3011Linear  [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,5],"tags":[],"class_list":["post-103","post","type-post","status-publish","format-standard","hentry","category-6","category-5"],"_links":{"self":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/posts\/103","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=103"}],"version-history":[{"count":0,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/posts\/103\/revisions"}],"wp:attachment":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}