我们的行星系统起源于太阳仍年轻并被星周盘围绕之时。尽管恒星形成演化序列已被很好描绘，我们对驱动这些演变的物理现象知之甚少。这些决定了围绕不同质量恒星及在不同环境中，行星是否形成及所形成行星的种类。我们的项目研究盘的演化，首先通过尖端观测手段测量原行星盘的尘埃与化学结构，其次发展新技术改良有关主序前恒星演化、年轻恒星年龄及其星周盘的模型。我们对原行星盘的考察将集中于一项已通过的ALMA巡天，辅以已有数据和未来ALMA与JWST项目申请，并以我们项目组的盘模型支持。我们的主序前演化研究采用高分辨率光学和近红外光谱，包括归档数据和新设备，并结合新的光谱推断技术，量化黑子对恒星大气对流效率的影响。针对这两项研究的基础设施均已就绪，并有本组的近期高影响度论文支持，内容涵盖盘的ALMA观测和黑子在恒星演化中的剧烈影响。结合这些有关年轻恒星和盘的研究计划可帮助我们揭示驱动年轻恒星和星周盘演化的物理过程。

The origins of our own planetary system was set when the sun was still young and surrounded by a circumstellar disk. Although the evolutionary sequence of star formation is now well charted, the physical phenomena that drive these changes are still poorly understood. These differences determine whether and what types of planets will form, around stars of different masses and in different environments. In our NSFC proposal, we study disk evolution first by using state-of-the-art observations to measure dust and chemical structures in protoplanetary disks, and second by developing innovative techniques to improve models of pre-main sequence stellar evolution and ages of young stars and their disks. Our exploration of protoplanetary disks will focus on an approved ALMA survey led by KIAA, supplemented by existing data and future ALMA and JWST proposals, supported by disk models within our NSFC team. Our investigations into pre-main sequence evolution exploits high-resolution optical and near-IR spectra from archives and from new instruments, such as IGRINS, IRTF/iSHELL, and CFHT/SPIRou, combined with newly developed spectral inference techniques, to quantify the role of spots in modulating the convective efficiency of the atmosphere. The infrastructure for both of these research projects is in place, with recent high-impact papers led by our group in both ALMA observations of disks and in the drastic effect of spots in stellar evolution. These related research plans into young stars and their disks combined will help to reveal the physical processes that drive the evolution of young stars and their disks.