Self-consistent Color-Stellar Mass-to-light Ratio Relations for Low Surface Brightness Galaxies
Self-consistent Color-Stellar Mass-to-light Ratio Relations for Low Surface Brightness Galaxies
复制标题
低表面亮度星系的自洽颜色-恒星质光比关系
DOI：
10.3847/1538-3881/aba754
复制
发表时间：
2020
影响因子：
5.3
通讯作者：
McGaugh Stacy S.
中科院分区：
文献类型：
--
作者：
Du Wei;McGaugh Stacy S.
The color-stellar mass-to-light ratio relation (CMLR) is a widely accepted tool for estimating the stellar mass (M-) of a galaxy. However, an individual CMLR tends to give distinctM()for a same galaxy when it is applied in different bands. Examining five representative CMLRs from the literature, we find that the difference inM()predicted in different bands from optical to near-infrared by a CMLR is 0.1 similar to 0.3 dex. Based on a sample of low surface brightness galaxies that covers a wide range of color and luminosity, we therefore recalibrated each original CMLR inr,i,z,J,H, andKbands to give internally self-consistentM()for a same galaxy. Theg-ris the primary color indicator in the recalibrated relations, which show little dependence on red (r-z) or near-infrared (J-K) colors. Additionally, the external discrepancies in the originally predicted gamma()by the five independent CMLRs have been greatly reduced after recalibration, especially in the near-infrared bands, implying that the near-infrared luminosities are more robust in predicting gamma(). For each CMLR, the recalibrated relations provided in this work could produce internally self-consistentM()from divergent photometric bands, and are extensions of the recalibrations from the Johnson-Cousin filter system by the pioneering work of McGaugh & Schombert to the filter system of the Sloan Digital Sky Survey.
