| Abstract |
Planetary nebulae (PNe) are a final stage of stellar evolution of low and intermediate mass stars. The number of these is so large in our galaxy thus PNe play an important role in interstellar dust formation. △△The observations of cold dust component in bipolar PNe enable us to understand the origin source of dust in our galaxy. Because it is seems to be evolved from stars with the initial masses of four to eight. The mass of dust in PNe is dominated by cold dust components. However these have not been studied well, especially at around 100K component. △△We observed the cold dust component of three famous bipolar PNe with MAX38 which is our own developed mid-infrared camera. Surprisingly we found that the large amount of cold dust around the central stars of three objects which is much larger than the expected value. And most of the ejecta from its central star are concentrated in the central region.△In this presentation, I focus on the detail of cold temperature dust in the bipolar PN Mz3. |
