A Near-Infrared Survey of the Taurus Molecular Cloud: Near-Infrared Luminosity Function
A Near-Infrared Survey of the Taurus Molecular Cloud: Near-Infrared Luminosity Function
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金牛座分子云的近红外观测：近红外光度函数
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
I. Gatley
中科院分区：
文献类型：
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作者：
Y. Itoh;M. Tamura;I. Gatley
我们对金牛座分子云Heiles云2（HC 2）的中心1° × 1°区域进行了近红外观测。这次测量的极限星等为13.4等，我们在K.根据颜色-颜色图，47个源被分类为II类目标，3个为I类目标。HC 2中II类天体的微分光度函数似乎没有任何截止，这与Comeron等人对蛇夫座ρ云的结果一致。大部分的来源是低光度的II类天体。这些都是非常低质量的第二类天体，大约有太阳质量，或者拱星盘的耗散时间尺度比典型的可见第二类天体要长。
We have carried out a near-infrared survey of the central 1° × 1° region of Heiles cloud 2 (HC2), one of the densest regions of the Taurus molecular cloud. The limiting magnitude of this survey was 13.4 mag, and we have detected 831 sources at K. Based on the color-color diagram, 47 sources were classified as class II objects, and three as class I objects. The differential luminosity function of the class II objects in HC2 does not appear to have any cutoff, in agreement with the result by Comeron et al. for the ρ Ophiuchi cloud. The majority of the sources are low-luminosity class II objects. Either these are very low mass class II objects with about solar mass or the dissipation timescale of the circumstellar disk is longer than that of typical visible class II objects.