Deep Near-Infrared Observations of the X-Ray-emitting Class 0 Protostar Candidates in the Orion Molecular Cloud 3
Deep Near-Infrared Observations of the X-Ray-emitting Class 0 Protostar Candidates in the Orion Molecular Cloud 3
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对猎户座分子云 3 中发射 X 射线的 0 级原恒星候选者的深近红外观测
DOI：
10.1086/340559
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
U. Hawaii
中科院分区：
文献类型：
--
作者：
M. Tsujimoto;K. Koyama;Y. Tsuboi;G. Chartas;M. Goto;N. Kobayashi;H. Terada;A. University;P. S. University;Naoj;U. Hawaii
We obtained near-infrared (NIR) imaging with the Subaru Telescope of the class 0 protostar candidates in the Orion molecular cloud 3, two of which were discovered to have X-ray emission by the Chandra X-Ray Observatory . We found strong evidence for the class 0 nature of the X-ray sources. First, our deep K-band image shows no emission brighter than 19.6 mag from both of these X-ray sources. Since class I protostars or class II T Tauri stars should be easily detected in the NIR with this sensitivity, the lack of K-band detection suggests that they are likely much more obscured than class I protostars. Second, our H2 v = 1-0 S(1) image shows a bubble-like feature from one of the X-ray class 0 protostar candidates, which reinforces the idea that this is a class 0 protostar. We also discuss the nature of nine NIR sources found in our deep image based on their colors, spatial coincidence with millimeter cores, and the properties of their X-ray counterparts.
