Deep Near-Infrared Imaging toward the Vela Molecular Ridge C. II. New Protostars and Embedded Clusters in Vela C
Deep Near-Infrared Imaging toward the Vela Molecular Ridge C. II. New Protostars and Embedded Clusters in Vela C
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DOI：
10.1086/506148
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发表时间：
2006-09
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通讯作者：
D. Baba;S. Sato;C. Nagashima;S. Nishiyama;D. Kato;Y. Haba;T. Nagata;T. Nagayama;M. Tamura;K. Sugitani
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作者：
D. Baba;S. Sato;C. Nagashima;S. Nishiyama;D. Kato;Y. Haba;T. Nagata;T. Nagayama;M. Tamura;K. Sugitani
我们提出了新的候选人的原恒星和嵌入式集群中检测到我们的深近红外（J，H，KS）成像调查云C船帆座分子脊（船帆座C）。我们根据与中段空间实验（MSX）和/或IRAS源的位置重合以及它们在2 - 25 μm范围内的光谱能量分布斜率来选择原恒星候选者。对于嵌入式集群，我们选择了他们的位置重合的基础上与MSX和/或红外天文台的来源和增强恒星数密度。我们确定了31个源作为原恒星候选人和5个集群作为嵌入式集群，28个原恒星候选人和3个嵌入式集群是新发现的。它们中的大多数与分布在船帆座C的C18 O团块有关。我们计算了原恒星候选者的辐射热光度，通过整合观测到的近红外到远红外的通量，然后估计质量范围为0.9到4.0 M <$A，假设它们的年龄在出生线上。嵌入星团中最亮的星星的KS星等与星团成员数之间存在相关性。
We present new candidates for protostars and embedded clusters detected in our deep near-infrared (J, H, KS) imaging survey of cloud C of the Vela Molecular Ridge (Vela C). We selected protostar candidates on the basis of positional coincidences with Midcourse Space Experiment (MSX) and/or IRAS sources and the slopes of their spectral energy distributions from 2 to 25 μm. For embedded clusters, we selected them on the basis of positional coincidence with MSX and/or IRAS sources and enhancement of stellar number densities. We identified 31 sources as protostar candidates and 5 clusters as embedded clusters; 28 protostar candidates and 3 embedded clusters were newly identified. Most of them are associated with the C18O clumps distributed throughout Vela C. We calculated the bolometric luminosities of the protostar candidates by integrating the observed fluxes from near- to far-infrared, and then estimated the mass range to be from 0.9 to 4.0 M⊙, assuming their ages at the birth line. There is a correlation between the number of members and the KS magnitude of the brightest star in the embedded clusters.