光谱巡天恒星的均匀推导恒星参数目录
A Catalog of Homogeneously Derived Stellar Parameters for Spectroscopic Survey Stars
AI总结：
该研究构建了含5533颗HARPS等径向速度巡天单星的均匀恒星参数目录，用MIST、PARSEC模型结合贝叶斯框架推导参数，明确了方法差异对不同类型恒星质量估计的影响，为系外行星研究提供了可靠参考样本。
AI中文摘要：
均匀推导的恒星参数对于系外行星人口统计研究至关重要，因为它们直接影响推断出的行星质量、半径和整体密度。本研究提出了一个新的均匀恒星物理参数目录，包含5533颗由HARPS、HIRES和CARMENES径向速度（RV）巡天观测到的单星。恒星参数使用贝叶斯框架结合两套独立的恒星演化模型确定：MIST和PARSEC，采用已发表的光谱参数估计值和目录值作为先验。将得到的恒星有效温度、质量、半径和表面重力与主要系外行星目录中列出的恒星参数进行比较，评估其一致性。虽然我们的估计值与外部目录中列出的参数一致，但我们发现低质量恒星、前主序星以及G型和K型巨星的恒星质量存在与方法相关的差异，其中基于等时线的解可能受年龄-质量简并性影响。对于M型矮星等低质量恒星，该目录提供了基于已确立的质光经验关系推导的质量，这类质量往往更可靠。该目录为多普勒巡天目标提供了最大的均匀推导恒星参考样本，同时也阐明了恒星参数均匀化方法在未来RV系外行星人口统计研究中的适用性和局限性。
英文摘要：
Uniformly derived stellar parameters are vital for exoplanet demographic studies because they directly influence the inferred planetary masses, radii, and bulk densities. This study presents a new homogeneous catalog of physical stellar parameters for 5533 single stars observed by the HARPS, HIRES, and CARMENES radial-velocity (RV) surveys. Stellar parameters are determined using a Bayesian framework with two independent sets of stellar evolutionary models: MIST and PARSEC, using published spectroscopic parameter estimates and catalog values as priors. The resulting stellar effective temperatures, masses, radii, and surface gravities are compared and evaluated for consistency with stellar parameters listed in major exoplanet catalogs. While our estimates show consistency with those listed in external catalogs, we identify method-dependent differences in stellar masses for low-mass and pre-main-sequence stars, as well as G and K giants, where isochrone-based solutions may be affected by age-mass degeneracies. For low-mass stars such as M-dwarfs, the catalog provides masses derived from established mass-luminosity empirical relations, which tend to be more reliable. This catalog provides the largest uniformly derived stellar reference sample for Doppler survey targets and also illustrates the applicability and limitations of stellar-parameter homogenisation methods for future RV exoplanet demographics studies.
