AI 中文总结
该研究用TESS数据探测到98颗含43颗质量超3 M☉的类太阳振荡红巨星，发现APOGEE DR19光谱log g与星震学结果存在0.23 dex偏移，还识别出约3.7万颗候选体。
AI 中文摘要
红巨星星震学可提供精确的恒星参数，是研究恒星结构与演化的有力工具，开普勒任务已证明这一点。但受限于视场，开普勒主要观测银盘外数量更多的低质量红巨星，对质量超过3倍太阳质量（3 M☉）的红巨星探测有限。本文利用全天空TESS数据，通过测光与光谱数据预筛选，从大型星表中选出227颗中等质量候选体；采用定制孔径的专用光变曲线去趋势方法优化TESS光变曲线，与MIT快速处理管道相比，即使在恒星密集的银盘区域，振荡包络内的功率背景比平均提升12%。我们在98颗目标中探测到类太阳振荡，其中43颗质量超过3 M☉，还有10颗质量大于5 M☉，是迄今探测到的最高质量类太阳振荡器之一。从探测结果发现，APOGEE DR19光谱学的表面重力对数（log g）比星震学结果平均大0.23 dex，该偏移可能源于APOGEE管道校准光谱log g时，缺乏开普勒观测到的中等质量红巨星。将相同预筛选标准应用于具有Gaia XP光谱参数的TESS目标，可识别出多达37000颗中等质量类太阳振荡器候选体，用于后续观测与恒星种群研究。
英文摘要
Red-giant asteroseismology yields precise stellar parameters, making it a powerful tool for studying stellar structure and evolution, as demonstrated by the Kepler mission. However, due to Kepler's limited field of view, it primarily sampled the more populous low-mass red giants found outside of the Galactic plane, leading to limited detections of red giants above $\rm 3\ M_{\odot}$. Here we use the all-sky TESS data to isolate 227 intermediate-mass candidates from large catalogs with a pre-selection based on photometric and spectroscopic data. We optimize TESS light curves using a boutique light curve detrending method with custom apertures. Compared to the MIT Quick Look Pipeline, this yields a 12% average increase in the power-to-background ratio within the oscillation envelope, even in the heavily crowded Galactic plane. We detect solar-like oscillations in 98 targets, including 43 with $\rm M_* > 3\ M_{\odot}$. Our sample also includes 10 stars having masses greater than $5\ \rm{M}_{\odot}$, among the highest-mass solar-like oscillators detected to date. From our detections, we find that the APOGEE DR19 spectroscopic $\log g$ is systematically larger by, on average, 0.23 dex compared to the seismic $\log g$. This offset is possibly due to the lack of intermediate-mass giants observed by Kepler, which was used to calibrate the spectroscopic $\log g$ in the APOGEE pipeline. Extending the same pre-selection criteria to TESS targets with Gaia XP spectroscopic parameters identifies up to 37,000 candidate intermediate-mass solar-like oscillators for follow-up and population studies.
Comments15 pages, 10 figures
