ar X iv : 0 71 0 . 21 35 v 1 [ as tr o - ph ] 1 0 O ct 2 00 7 IC 4406 : a radio - infrared view
نویسنده
چکیده
IC 4406 is a large (about 100 × 30) southern bipolar planetary nebula, composed of two elongated lobes extending from a bright central region, where there is evidence for the presence of a large torus of gas and dust. We show new observations of this source performed with IRAC (Spitzer Space Telescope) and the Australia Telescope Compact Array. The radio maps show that the flux from the ionized gas is concentrated in the bright central region and originates in an intricate structure previously observed in Hα, while in the infrared images filaments and clumps can be seen in the extended nebular envelope, the central region showing toroidal emission. Modelling of the infrared emission leads to the conclusion that several dust components are present in the nebula. Subject headings: Radio continuum: stars, Infrared: stars, Planetary nebulae: individual (IC 4406)
منابع مشابه
ar X iv : 0 71 0 . 21 35 v 2 [ as tr o - ph ] 1 5 A pr 2 00 8 IC 4406 : a radio - infrared view
IC 4406 is a large (about 100 × 30) southern bipolar planetary nebula, composed of two elongated lobes extending from a bright central region, where there is evidence for the presence of a large torus of gas and dust. We show new observations of this source performed with IRAC (Spitzer Space Telescope) and the Australia Telescope Compact Array. The radio maps show that the flux from the ionized...
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