标题： ESO超木星巡天第三部分：确认YSES 1 b中的13CO以及用CRIRES+对YSES 1 c的大气检测 显示英文标题

标题： The ESO SupJup Survey III: Confirmation of 13CO in YSES 1 b and Atmospheric Detection of YSES 1 c with CRIRES+

摘要： 高分辨率光谱表征年轻超木星行星能够对它们大气中的元素和同位素丰度进行精确限制。 作为ESO SupJup调查的一部分，我们使用升级后的VLT/CRIRES+（R~100,000）在K波段对YSES 1（或TYC 8998-760-1）中的两个宽轨道超木星进行了高分辨率光谱观测。 我们进行自由大气反演分析以限制化学和同位素丰度、温度结构、旋转速度和径向速度。 我们在YSES 1 b中确认了13CO的先前检测，显著性达到12.6{\sigma }，但指出12CO/13CO比值为88+/-13（1{\sigma }置信区间），与主星的同位素比值66+/-5一致。 我们在YSES 1 b中检索到类似太阳的成分，C/O=0.57+/-0.01，表明其形成通过引力不稳定性或在CO冰线之外的核心吸积。 此外，观测分别在7.3{\sigma }和5.7{\sigma }检测到外层行星YSES 1 c中的H2O和CO。 我们将YSES 1 c的大气C/O比值限制为太阳或低于太阳的（C/O=0.36+/-0.15），表明氧丰富的固体物质的吸积。 这两个伴星具有不同的vsini，YSES 1 b为5.34+/-0.14 km/s，YSES 1 c为11.3+/-2.1 km/s，尽管它们的原始环境相似。 这可能表明不同的自转轴倾角或长寿命的原行星盘对YSES 1 b的有效磁制动。YSES 1 是一个引人注目的系统，可用于超木星伴星的比较研究，并将现有大气与形成历史联系起来。 显示英文摘要

摘要： High-resolution spectroscopic characterization of young super-Jovian planets enables precise constraints on elemental and isotopic abundances of their atmospheres. As part of the ESO SupJup Survey, we present high-resolution spectral observations of two wide-orbit super-Jupiters in YSES 1 (or TYC 8998-760-1) using the upgraded VLT/CRIRES+ (R~100,000) in K-band. We carry out free atmospheric retrieval analyses to constrain chemical and isotopic abundances, temperature structures, rotation velocities, and radial velocities. We confirm the previous detection of 13CO in YSES 1 b at a higher significance of 12.6{\sigma}, but point to a higher 12CO/13CO ratio of 88+/-13 (1{\sigma} confidence interval), consistent with the primary's isotope ratio 66+/-5. We retrieve a solar-like composition in YSES 1 b with a C/O=0.57+/-0.01, indicating a formation via gravitational instability or core accretion beyond the CO iceline. Additionally, the observations lead to detections of H2O and CO in the outer planet YSES 1 c at 7.3{\sigma} and 5.7{\sigma}, respectively. We constrain the atmospheric C/O ratio of YSES 1 c to be either solar or subsolar (C/O=0.36+/-0.15), indicating the accretion of oxygen-rich solids. The two companions have distinct vsini, 5.34+/-0.14 km/s for YSES 1 b and 11.3+/-2.1 km/s for YSES 1 c, despite their similar natal environments. This may indicate different spin axis inclinations or effective magnetic braking by the long-lived circumplanetary disk around YSES 1 b. YSES 1 represents an intriguing system for comparative studies of super-Jovian companions and linking present atmospheres to formation histories.