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The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA Derived Quantities, Data Visualization Tools and Stellar Library
D. S. Aguado, Romina Ahumada, Andres Almeida +230
Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years o…
Mass - metallicity relation and fundamental metallicity relation of metal-poor star-forming galaxies at from the eBOSS survey
Yulong Gao, Min Bao, Qirong Yuan +7
The stellar mass-metallicity relation (, MZR) indicates that the metallicities of galaxies increase with increasing stellar masses. The fundamental metallicity relation (F…
Photometric calibration for the Beijing-Arizona Sky Survey and Mayall z-band Legacy Survey
Zhimin Zhou, Xu Zhou, Hu Zou +14
We present the photometric calibration of the Beijing-Arizona Sky Survey (BASS) and Mayall z-band Legacy Survey (MzLS), which are two of the three wide-field optical legacy imaging…
M101: Spectral Observations of HII Regions and Their Physical Properties
Ning Hu, Enci Wang, Zesen Lin +11
By using the Hectospec 6.5 m Multiple Mirror Telescope (MMT) and the 2.16 m telescope of National Astronomical Observatories, Chinese Academy of Sciences (NAOC), we obtained 188 hi…