用NIRC2和SINFONI观察2019年PDKEEPAAA的远点
Observation of the apoapsis of S62 in 2019 with NIRC2 and SINFONI
摘要：
鉴于越来越多的注意力对银河系中心的微弱恒星的检测，我们想解决的可探测性S62在其远地点与SINFONI（VLT）和NIRC 2（KECK）在这项工作中。由于附近的恒星和混淆的机会，我们正在使用Lucy-Richardson去卷积图像来检测S62围绕Sgr~A* 的开普勒轨道，周期小于10年。我们使用与S62相同的数据集，根据本工作中提出的轨道要素，在预期位置处额外追踪S星团恒星S29。为了验证滤波技术的结果，我们正在分析与NIRC 2/KECK独立观测的同一时期的K波段连续数据。基于S62的轨道，我们发现该恒星在2019.4和2019.5的预期位置投影。通过分析2019年5月的SINFONI数据，我们确认了之前使用NACO（VLT）推导的S62的$16.1\,\pm\,0.2$等。我们的NACO成像分析的基础上的强大的数据集，以前用于调查的史瓦西精度的S2。我们还提出了一个重要的讨论其他地方提出的线性轨迹的S62和它有争议的身份与19等的恒星发现的重力安装在VLT干涉仪。
英文摘要：
Given the increased attention towards the detection of faint stars in the Galactic center, we would like to address the detectability of S62 in its apoapsis with SINFONI (VLT) and NIRC2 (KECK) in this work. Because of the nearby stars and the chance of confusion, we are using Lucy-Richardson deconvolved images to detect S62 on its Keplerian orbit around Sgr~A* with a period of less than 10 years. We use the same dataset as for S62 to trace additionally the S-cluster star S29 at the expected position based on the orbital elements presented in this work. To verify the results of the filtering technique, we are analysing K-band continuum data of the same epoch independently observed with NIRC2/KECK. Based on the well-derived orbit of S62, we find the star in projection at the expected position in 2019.4 and 2019.5. By analyzing the SINFONI data of 2019.5, we confirm the $16.1\,\pm\,0.2$ mag for S62 that was formerly derived with NACO (VLT). We base our NACO imaging analysis on the robust data set that was previously used to investigate the Schwarzschild precision of S2. We also present a critical discussion of the elsewhere proposed linear trajectory of S62 and its disputed identification with a 19 mag star found with GRAVITY mounted at the VLT Interferometer.
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