期刊
ASTROPHYSICAL JOURNAL
卷 664, 期 2, 页码 950-955出版社
UNIV CHICAGO PRESS
DOI: 10.1086/518929
关键词
infrared : stars; ISM : individual (Orion Kleinmann-Low); planetary systems : formation; stars : formation; stars : individual (I, IRc 2)
We have imaged the enigmatic radio source I (Orion I) in the Orion KL nebula with the VLA at 43 GHz with 34 mas angular resolution. The continuum emission is highly elongated and is consistent with that expected from a nearly edgeon disk. The high brightness and lack of strong molecular lines from Orion I can be used to argue against emission from dust. Collisional ionization and H- free-free opacity, as in Mira variables, require a central star with greater than or similar to 10(5) L-circle dot, which is greater than infrared observations allow. However, if significant local heating associated with accretion occurs, lower total luminosities are possible. Alternatively, photoionization from an early B-type star and p(+)/e(-) bremsstrahlung can explain our observations, and Orion I may be an example of ionized accretion disk surrounding a forming massive star. Such accretion disks may not be able to form planets efficiently.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据