EVIDENCE FOR PROTOSTELLAR INFALL IN NGC 1333-IRAS2
EVIDENCE FOR PROTOSTELLAR INFALL IN NGC 1333-IRAS2
复制标题
NGC 1333-IRAS2 中原恒星陨落的证据
DOI：
10.1093/mnras/281.3.l53
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发表时间：
1996
影响因子：
4.8
通讯作者：
P. André
中科院分区：
文献类型：
--
作者：
D. Ward;H. Buckley;J. Greaves;W. Holland;P. André
Observations are presented of HCO+ (J=4~3) emISSIon towards the Class 0 protostar NGC 1333-IRAS2, showing a self-absorbed, asymmetric, double-peaked spectral line profile, with the blue peak more intense than the red. Such a profile is expected in the infalling envelopes of protostars. A non-local, spherically symmetric, exact A-iteration radiative transfer code is used to generate a model HCO + spectrum for an infalling envelope, which is found to be in good agreement with the observations, supporting the protostellar infall interpretation. The total mass and luminosity of the proto star required by the model fit to the spectral line data are consistent with those previously derived, although the exact radial dependence of parameters such as density and velocity is not well constrained. This source therefore becomes one of only a small number of proto stars in which infall has been directly observed.
