An infrared study of Herbig Ae/Be stars
An infrared study of Herbig Ae/Be stars
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DOI：
10.1007/s10509-005-9031-6
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发表时间：
2006-08
影响因子：
1.9
通讯作者：
P. Zhang;H. T. Yang;J. Liu
中科院分区：
文献类型：
--
作者：
P. Zhang;H. T. Yang;J. Liu
本文确定了206颗HAEBE星的IRAS星协和2 MASS星协。从色图和光谱指数可以看出，大多数样品的红外过量是由于星周物质的热发射。研究还发现，少数HAEBE星在红外光谱区的红外辐射和部分HAEBE星的近红外辐射可能是由星周电离气体的自由-自由辐射或自由束缚辐射引起的。此外，对Malfait等（1998）提出的从嵌入HAEBE星到类β Pictoris主序星的演化方案进行了检验，结果不支持这种演化方案。
The IRAS and 2MASS associations for 206 HAEBE stars are identified in this paper. From the color-color diagrams and spectral index, it is found that the IR excesses for most samples are due to thermal emission from the circumstellar material. It is also found that the IR excesses at IRAS region for few HAEBE stars and the near-IR excesses for some HAEBE stars are likely attributed to free-free emission or free-bound emission from the circumstellar ionized gas. Moreover, the evolution scenario (from embedded HAEBE stars to β Pictoris-like main-sequence stars) from Malfait et al. (1998) has been checked, our result does not support this evolution scenario.