The infrared properties of the new outburst star IRAS 05436-0007 in quiescent phase
The infrared properties of the new outburst star IRAS 05436-0007 in quiescent phase
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新爆发恒星 IRAS 05436-0007 静止相的红外特性
DOI：
10.1051/0004-6361:20040138
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发表时间：
2004
影响因子：
6.5
通讯作者：
Boulder
中科院分区：
文献类型：
--
作者：
P. 'Abrah'am;'A. K'osp'al;S. Csizmadia;A. Mo'or;M. Kun;G. Obs.;Budapešť;Eotvos Univ.;U. Colorado;Boulder
我们编制和研究了新爆发星星IRAS 05436−0007在静止相的红外/亚毫米/毫米SED。这颗星星是一个平光谱源，估计总光度为Lbol 5.6 L，是典型的低质量金牛T星。导出的0.5 M的星周质量在低质量的YSO中是相当高的。所观察到的SED不同于典型的金牛座T星和4个著名的EXOR的SED，而更像是FU Orionis天体的SED，表明存在星周包层。IRAS 05436−0007可能是II类源，年龄约为4 × 105年。在这个演化阶段，吸积盘已经完全发育，尽管星周包层也可能存在。对这次爆发的观测将提供关于爆发源的更多知识。
We compiled and investigated the infrared/sub-mm/mm SED of the new outburst star IRAS 05436−0007 in quiescent phase. The star is a flat-spectrum source, with an estimated total luminosity of Lbol ≈ 5.6 L� , typical of low-mass T Tauri stars. The derived circumstellar mass of 0.5 Mis rather high among low-mass YSOs. The observed SED differs from the SEDs of typical T Tauri stars and of 4 well-known EXors, and resembles more the SEDs of FU Orionis objects indicating the presence of a circumstellar envelope. IRAS 05436−0007 seems to be a class II source with an age of approximately 4 × 10 5 yr. In this evolutionary stage an accretion disk is already fully developed, though a circumstellar envelope may also be present. Observations of the present outburst will provide additional knowledge on the source.