发表机构
Aryabhatta Research Institute of Observational Sciences (ARIES); Indian Institute of Technology Roorkee; Mahatma Jyotiba Phule Rohilkhand University（阿里亚巴塔观测科学研究所（ARIES）; 印度理工学院鲁尔基分校; 圣雄乔蒂巴·普莱罗希尔坎德大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究综合测光与光谱数据，分析 IC 1848E 区域与象鼻状结构相关的 8 个年轻恒星天体，发现其红外变异性与星周盘演化及吸积活动密切相关。
AI 中文摘要
我们对与 IC 1848E 恒星形成区域中细长、象鼻状结构（ETLSs）相关的年轻恒星候选体进行了综合分析，结合了多历元中红外（MIR）测光和光学光谱观测。对 Chauhan 等人（2011）最初识别的 15 个候选 YSO 样本，使用多历元 NEOWISE $W1$ 和 $W2$ 测光来表征其变异性。在施加严格的位置和测光质量约束后，最终保留了 8 个可靠的 YSO，并将其分为三类变异性：非变、长期变化和随机变化。其中一个源，Star #9，在 MIR 光变曲线和颜色-星等图中表现出明显的弯曲变异性，表明其星周盘和/或吸积过程发生系统性演化。该天体的光学光谱数据显示出强烈的 H$\alpha$ 发射和显著禁线，为活跃的质量吸积和外流现象提供了清晰证据。综合测光和光谱诊断建立了 IC 1848E 中与 ETLSs 相关的 YSO 中红外变异性、星周盘演化和吸积驱动活动之间的密切联系。
英文摘要
We present a comprehensive analysis combining multi-epoch mid-infrared (MIR) photometric and optical spectroscopic observations of young stellar candidates associated with elongated, elephant trunk-like structures (ETLSs) in the IC 1848E star-forming region. A sample of 15 candidate YSOs, initially identified by Chauhan et al. (2011), was investigated using multi-epoch NEOWISE $W1$ and $W2$ photometry to characterize their variability properties. After imposing stringent positional and photometric quality constraints, a final set of eight robust YSOs was retained and classified into three variability categories: non-variable, secular, and stochastic. One source, Star #9, exhibits a pronounced curved variability in the MIR light-curve and color-magnitude domains, indicative of systematic evolution of its circumstellar disk and/or accretion processes. Optical spectroscopic data for this object show strong H$α$ emission and prominent forbidden lines, providing clear evidence of active mass accretion and outflow phenomena. The combined photometric and spectroscopic diagnostics establish a close link between infrared variability, circumstellar disk evolution, and accretion-driven activity in YSOs associated with ETLSs in IC 1848E.
Comments8 pages, 1 figure, accepted for publication in the Bulletin of the Liège Royal Society of Sciences (BINA proceedings)
