论文标题
SDSS-IV漫画：漫画矮星系样品
SDSS-IV MaNGA: The MaNGA Dwarf Galaxy Sample
论文作者
论文摘要
我们介绍了Sloan Digital Sky-Survey-IV计划的最终版本，介绍了曼加矮星银河系，曼陀罗，增值-Catalog，Vac。曼陀罗由136个随机选择的明亮矮星系组成，$ m _ {*} <10^{9.1} \ odot $和$ m_ {g}> - 18.5 $使其成为矮星系的最大积分场光谱谱均匀。我们根据DESI传统成像调查以及基于Pipe3D SDSS-IV VAC的光谱分析发布了$ G，R $和$ Z $宽带成像的光度分析。我们的释放包括表面亮度（SB），几何参数和颜色曲线，Sérsic拟合以及恒星种群特性（例如，恒星年龄，金属度，恒星形成历史）以及FOV内的发射线和发射线路磁通量和星系的有效半径。我们发现，大多数曼陀罗星系是用$ \ langle {} n _ {\ text {sersic，r}} \ rangle \ sim1.6 $ centrals（Central/satellite dichotomy）形成的恒星形成晚期星系。曼陀罗涵盖了大量的SB值（我们发现11个超弥漫星系和3个紧凑型的候选物），填补了Kormendy图中的经典矮人和低质量星系之间的间隙，以及尺寸质量/光度的关系，以$ 10^8 <m _} $ 10^8 <m _ {*}/j {*}/j {*}/j {*}/j {*}/flatten flatten。 $ \ langle {} r_ {e，r} \ rangle \ sim2.7 $ kpc。由SF的早期低金属性爆发形成的曼陀罗星系很大一部分，但也来自更富含金属的气体的晚期SF事件：一半的曼陀罗星系在$ \ langle {} z \ rangle> 2 $中汇集了$ 50 \％的质量，而最后的$ 20 $ \％则是$ \ lang $ \ lang。最后，在$ m _ {*} \ sim10^{9} \ odot $中，ssfr- $ m _ {*} $关系的弯曲似乎由曼达拉（Mandala）支持。
We present the MaNGA Dwarf galaxy, MaNDala, Value-Added-Catalog, VAC, from the final release of the Sloan Digital Sky Survey-IV program. MaNDala consists of 136 randomly selected bright dwarf galaxies with $M_{*}<10^{9.1}\odot$ and $M_{g}>-18.5$ making it the largest Integral Field Spectroscopy homogeneous sample of dwarf galaxies. We release a photometric analysis of the $g,r$ and $z$ broadband imaging based on the DESI Legacy Imaging Surveys as well as the spectroscopic analysis based on the Pipe3D SDSS-IV VAC. Our release includes the surface brightness (SB), geometric parameters and color profiles, Sérsic fits as well as stellar population properties (such as, stellar ages, metallicities, star formation histories), and emission lines fluxes within the FOV and the effective radii of the galaxies. We find that the majority of the MaNDala galaxies are star forming late-type galaxies with $\langle{}n_{\text{Sersic,r}}\rangle\sim1.6$ that are centrals (central/satellite dichotomy). MaNDala covers a large range of SB values (we find 11 candidates of ultra diffuse galaxies and 3 compact ones), filling the gap between classical dwarfs and low-mass galaxies in the Kormendy Diagram and in the size-mass/luminosity relation, whichseems to flatten at $10^8<M_{*}/\odot<10^{9}$ with $\langle{}R_{e,r}\rangle\sim2.7$ kpc. A large fraction of MaNDala galaxies formed from an early low-metallicity burst of SF but also of late SF events from more metal-enriched gas: half of the MaNDala galaxies assembled $50\%$ of their mass at $\langle{}z\rangle>2$, while the last $20\%$ was at $\langle{}z\rangle<0.3$. Finally, a bending of the sSFR-$M_{*}$ relation at $M_{*}\sim10^{9}\odot$ for the main sequence galaxies seems to be supported by MaNDala.
