The Stellar Population in the rho Ophiuchi Cluster
The Stellar Population in the rho Ophiuchi Cluster
复制标题
rho蛇夫座星团中的恒星族群
DOI：
10.1086/173225
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
M. Rieke
中科院分区：
文献类型：
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作者：
F. Comerón;G. Rieke;A. Burrows;M. Rieke
我们报告了蛇夫座ρ星际云核心200弧分2的近红外探测，探测到91个源。我们开发了一种新的方法来估计这些来源的光度的基础上拟合的等时线从理论模型。应用这种方法，使我们能够确定一个光度函数和伴随的初始质量函数的集群的年轻恒星形成在这些云。IMF延伸至主层序底部（0.08 M ○）以下。），在恒星质量和亚恒星质量之间的过渡处没有明显的特征。在低恒星和亚恒星质量下，IMF的幂律指数大约为-1.3到-1.1，形式误差为0.2
We report a near-infrared survey of 200 arcmin 2 in the cores of the ρ Ophiuchi interstellar clouds, leading to the detection of 91 sources. We develop a new method for estimating the luminosities of these sources based on fitting of isochrones from theoretical models. Application of this method allows us to determine a luminosity function and accompanying initial mass function for the cluster of young stars forming in these clouds. The IMF extends to well below the bottom of the main sequence (0.08 M ○. ) with no obvious feature at the transition between stellar and substellar masses. The power-law exponent of the IMF at low stellar and substellar masses is roughly −1.3 to −1.1, with formal errors of 0.2