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arXiv 2202.04082astro-ph.GA
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The MaNGA FIREFLY Value-Added-Catalogue:10,010个邻近星系的解析恒星星族

The MaNGA FIREFLY Value-Added-Catalogue: resolved stellar populations of 10,010 nearby galaxies

Justus Neumann, Daniel Thomas, Claudia Maraston, Lewis Hill, Lorenza Nanni, Oliver Wenman, Jianhui Lian, Johan Comparat, Violeta Gonzalez-Perez, Kyle B. Westfal… 展开作者

Justus Neumann, Daniel Thomas, Claudia Maraston, Lewis Hill, Lorenza Nanni, Oliver Wenman, Jianhui Lian, Johan Comparat, Violeta Gonzalez-Perez, Kyle B. Westfall, Renbin Yan, Yanping Chen, Guy S. Stringfellow, Matthew A. Bershady, Joel R. Brownstein, Niv Drory, Donald P. Schneider

摘要:

我们提出了MANGA萤火虫增值目录(VAC)-一个目录的~ 370万空间分辨恒星星族属性在10,010附近的星系从最终数据发布的MANGA调查。全光谱拟合代码萤火虫是用来推导参数,如恒星年龄,金属丰度,恒星和残余质量,恒星形成历史,恒星形成率和尘埃衰减。除了Voronoi面元测量,我们的VAC还提供全局属性,例如中心值和径向梯度。VAC有两种变体:使用M11-MILES和新的MaStar恒星星族模型拟合的结果。MaStar允许在整个MaNGA波长范围内约束拟合,扩展年龄-金属丰度参数空间,并使用来自与MaNGA相同仪器的经验光谱。采用MaStar模型的拟合发现平均年龄略低,质量加权金属丰度较高,颜色过量较小。当匹配波长范围和会聚模板网格时,这些差异减小。我们进一步报告说,FIREFLY恒星质量系统地比MaNGA PCA和Pipe 3D VAC的质量低约0.3 dex,但与NSA的质量最匹配,只有约0.1 dex的差异。最后,我们表明萤火虫恒星年龄与光谱指数年龄指标H $δ_A$和$D_n$(4000)相关,尽管有明显的附加金属丰度依赖性。

英文摘要:

We present the MaNGA FIREFLY Value-Added-Catalogue (VAC) - a catalogue of ~3.7 million spatially resolved stellar population properties across 10,010 nearby galaxies from the final data release of the MaNGA survey. The full spectral fitting code firefly is employed to derive parameters such as stellar ages, metallicities, stellar and remnant masses, star formation histories, star formation rates and dust attenuation. In addition to Voronoi-binned measurements, our VAC also provides global properties, such as central values and radial gradients. Two variants of the VAC are available: presenting the results from fits using the M11-MILES and the novel MaStar stellar population models. MaStar allows to constrain the fit over the whole MaNGA wavelength range, extends the age-metallicity parameter space, and uses empirical spectra from the same instrument as MaNGA. The fits employing MaStar models find on average slightly younger ages, higher mass-weighted metallicities and smaller colour excesses. These differences are reduced when matching wavelength range and converging template grids. We further report that FIREFLY stellar masses are systematically lower by ~0.3 dex than masses from the MaNGA PCA and Pipe3D VACs, but match masses from the NSA best with only ~0.1 dex difference. Finally, we show that FIREFLY stellar ages correlate with spectral index age indicators H$δ_A$ and $D_n$(4000), though with a clear additional metallicity dependence.

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