发表机构
Alma Mater Studiorum Università di Bologna; European Southern Observatory; Universitäts-Sternwarte, Ludwig-Maximilians-Universität; Steward Observatory, The University of Arizona; School of Physics, Trinity College Dublin; INAF - Osservatorio Astronomico di Trieste; Universität Heidelberg; Università degli Studi di Palermo（博洛尼亚大学; 欧洲南方天文台; 慕尼黑大学大学天文台; 亚利桑那大学斯图尔德天文台; 都柏林三一学院物理学院; 意大利国家天体物理研究所的里雅斯特天文台; 海德堡大学; 巴勒莫大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过VLT/MUSE观测分析Trumpler 14中心低质量恒星，发现外部光蒸发随FUV辐射增强而快速消散星周盘，盘比例从30%降至5%以下，证实并扩展了盘消散估计。
AI 中文摘要
大多数恒星形成于大质量星团中，其中OB星的强烈远紫外（FUV）辐射可以通过外部光蒸发加速原行星盘的消散。量化这一过程对盘演化的影响仍然具有挑战性，尤其是在遥远且拥挤的恒星形成区域。我们研究了Trumpler 14高度辐照中心区域的低质量恒星群，并考察了局部FUV辐射场如何影响星周盘的演化。我们利用一种增强的背景优化提取方法从VLT/MUSE观测中提取了恒星光谱，仔细校正了随波长变化的仪器响应，并最终使用SAPSAL深度学习框架推导出恒星参数。我们将这些结果与局部FUV场的概率估计以及近红外测光相结合，以识别带有盘的恒星。我们识别出310个可靠的星团成员，其年龄为$0.66^{+0.73}_{-0.35}$百万年，局部辐射场范围为$\log(FUV)\simeq4.2-6.0\\\\ G_{\mathrm{0}}$。表现出近红外过剩的恒星比例从最低FUV通量时的30%下降到$\log(FUV)\gtrsim5.6\\\\ G_{\mathrm{0}}$时的低于5%，而我们简化的光学覆盖层估计与局部FUV场之间未发现显著相关性。盘比例随环境FUV通量的显著下降提供了强有力的证据，表明外部光蒸发正在快速消散Trumpler 14核心区域的星周盘。我们的结果证实了先前的盘消散估计，并将其扩展到更高的FUV场强度值。
英文摘要
Most stars form in massive stellar clusters, where intense far-ultraviolet (FUV) radiation from OB stars can accelerate the dispersal of protoplanetary disks through external photoevaporation. Quantifying the impact of this process on disk evolution remains challenging, particularly in distant and crowded star-forming regions. We investigate the low-mass stellar population in the highly irradiated center of Trumpler 14 and examine how the local FUV radiation field influences circumstellar disk evolution. We extracted stellar spectra from VLT/MUSE observations using an enhanced background-optimized extraction method, carefully corrected for instrumental response as a function of wavelength and finally derived the stellar parameters with the SAPSAL deep-learning framework. We combined these results with a probabilistic estimate of the local FUV field and near-infrared photometry to identify disk-bearing stars. We identify 310 bona fide cluster members with an age of $0.66^{+0.73}_{-0.35}$ Myr and local radiation fields spanning $\log(FUV)\simeq4.2-6.0\ G_{\mathrm{0}}$. The fraction of stars exhibiting near-infrared excess decreases from 30% at the lowest FUV fluxes to under 5% at $\log(FUV)\gtrsim5.6 \ G_{\mathrm{0}}$, while no significant correlation is found between our simplified estimate of the optical veiling and the local FUV field. The pronounced decline in the disk fraction with ambient FUV flux provides strong evidence for external photoevaporation rapidly dispersing circumstellar disks in the core of Trumpler 14. Our results confirm previous disk dispersal estimates and extend to higher values of the FUV field strength.
