Dust Size Effect On IR Colors Of AGB Stars

摘要：

With the Mie theory and the radiative transfer model,we studied the effect of dust size on the infrared color indexes concerning special filters used in the space infrared missions and typical filters in the near-infrared,of AGB stars with typical oxygen-rich and carbon-rich dust shells. It is found the most affected bands are the near-infrared bands JHK and the Spitzer IRAC bands,meanwhile the wavebands with reference wavelength longer than 10 μm is little affected. The effect increases fast with the mass loss rate. We also discussed the potential to distinguish the O-rich and C-rich dusts,and the difference in IR colors between the AGB stars and other IR sources like YSOs and galaxies.

关键词： stars:AGB and post-AGB stars:mass-loss (stars:)circumstellar matter

作者: Huan Wang W.Jiang R.Szczerba

作者单位: Department of Astronomy,Beijing Normal University,Beijing 100875,P.R.China Nicolaus Copernicus Astronomical Center,PL-87-100 Torun,Poland

会议类型: 国际会议

会议名称: The 252th Symposium of the International Astronomical Union(国际天文学联合会第252届研讨会)

会议地点: 海南三亚

会议语种:英文

页码: 263-264

在线出版日期: 2008-04-06（万方平台首次上网日期，不代表论文的发表时间）