发表机构
New York University Abu Dhabi; The Chinese University of Hong Kong; ELTE Eötvös Loránd University; MTA-ELTE Lendület “Momentum” Milky Way Research Group; MTA-ELTE Exoplanet Research Group; University of Portsmouth; University of Kentucky; University of Colorado; New Mexico State University（阿布扎比纽约大学; 香港中文大学; 厄特沃什·罗兰大学; 匈牙利科学院-厄特沃什·罗兰大学 Lendület “Momentum” 银河系研究组; 匈牙利科学院-厄特沃什·罗兰系外行星研究组; 朴茨茅斯大学; 肯塔基大学; 科罗拉多大学; 新墨西哥州立大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究利用贝叶斯平均方法，基于BOSZ和MARCS模型拟合MaStar光谱，确定了24,130颗恒星的四个参数，并验证了与APOGEE和Gaia的一致性。
AI 中文摘要
我们展示了来自斯隆数字巡天（SDSS）数据发布17（DR17）中MaNGA恒星库（MaStar）的24,130颗独特恒星的59,266条高质量光谱的恒星参数。光谱的每像素信噪比中位数为96。我们通过将数据与BOSZ（基于ATLAS-9）和MARCS理论大气模型进行比较，推导出四个恒星参数：有效温度（Teff）、表面重力（log g）、金属丰度（[M/H]）和α元素增强比（[α/M]）。我们采用贝叶斯方法，利用来自Gaia的颜色和绝对星等为每颗恒星选择一组理论模型子集。然后我们进行全光谱拟合以估计子集中每个模型的似然性，并计算其似然加权平均参数作为最终参数。我们设置了恒星参数质量标志以方便使用推导出的恒星参数。此处推导的MaStar恒星参数范围涵盖有效温度2,600 ≤ Teff ≤ 29,861 K，表面重力0 ≤ log g ≤ 5.5，金属丰度-4.9 ≤ [M/H] ≤ 1.0，以及α丰度比-0.98 ≤ [α/M] ≤ 1.0。我们将这些参数与APOGEE和Gaia的共同恒星进行了比较，发现总体在不确定性范围内一致。然而，存在一些伪影和系统性差异，我们讨论了其潜在原因。这些新的恒星参数可通过MaStar SDSS-IV DR17增值目录（此https URL）获取。
英文摘要
We present the stellar parameters for 59,266 high-quality spectra of 24,130 unique stars from the MaNGA Stellar Library (MaStar) in the Sloan Digital Sky Survey (SDSS) Data Release 17 (DR17). The median signal-to noise ratio per pixel of the spectra is 96. We derive four stellar parameters, effective temperature (Teff), surface gravity (log g), metallicity ([M/H]), and {$α$}-enhancement ratio ($\rm [α/M]$), by comparing the data with BOSZ (ATLAS-9 based) and MARCS theoretical atmospheric models. We adopt a Bayesian method and use color and absolute magnitude derived from Gaia to select a subset of theoretical models for each star. We then perform full-spectrum fitting to estimate the likelihood of each model in the subset and then compute their likelihood-weighted mean parameters as the final parameters. We set stellar-parameter quality flags to facilitate the use of the derived stellar parameters. The MaStar stellar parameters derived herein span an effective temperature range of $\rm 2,600 \leq T_{eff} \leq 29,861 K$, a surface gravity range of $0 \leq \log g \leq 5.5$, a metallicity range of $-4.9 \leq \rm[M/H] \leq 1.0$, and an {$α$}-abundance range of $\rm -0.98 \leq [α/M] \leq 1.0$. We compare these parameters with those from APOGEE and Gaia for stars in common, finding general consistency within the uncertainties. However, some artifacts and systematic differences are present, and we discuss their potential causes. These new stellar parameters are available through the MaStar SDSS-IV DR17 value-added catalog (https://www.sdss4.org/dr17/mastar/mastar-stellar-parameters/).
Comments27 pages, 20 figures
Journal refYan-Ping Chen et al 2026 ApJ 1007 188
