| Title | SCUSS u-BAND EMISSION AS A STAR-FORMATION-RATE INDICATOR |
| Authors | Zhou, Zhimin Zhou, Xu Wu, Hong Fan, Xiao-Hui Fan, Zhou Jiang, Zhao-Ji Jing, Yi-Peng Li, Cheng Lesser, Michael Jiang, Lin-Hua Ma, Jun Nie, Jun-Dan Shen, Shi-Yin Wang, Jia-Li Wu, Zhen-Yu Zhang, Tian-Meng Zou, Hu |
| Affiliation | Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Shanghai Jiao Tong Univ, Dept Phys & Astron, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China. Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China. Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China. Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China. Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China. |
| Keywords | dust, extinction galaxies: ISM galaxies: star formation infrared: galaxies DIGITAL SKY SURVEY ACTIVE GALACTIC NUCLEI FORMING GALAXIES NEARBY GALAXIES H-ALPHA INFRARED TRACERS LINE SPECTRA MU-M LUMINOSITIES CLASSIFICATION |
| Issue Date | 2017 |
| Publisher | ASTROPHYSICAL JOURNAL |
| Citation | ASTROPHYSICAL JOURNAL.2017,835(1). |
| Abstract | We present and analyze the possibility of using optical u-band luminosities to estimate star-formation rates (SFRs) of galaxies based on the data from the South Galactic Cap u. band Sky Survey (SCUSS), which provides a deep u-band photometric survey covering about 5000 deg(2) of the South Galactic Cap. Based on two samples of normal star-forming galaxies selected by the. BPT diagram, we explore the correlations between u-band, H alpha, and IR luminosities by combing SCUSS data with the Sloan Digital Sky Survey and Wide-field Infrared Survey Explorer (WISE). The attenuation-corrected u-band luminosities are tightly correlated with the Balmer decrement-corrected Ha luminosities with an rms scatter of similar to 0.17 dex. The IR-corrected u luminosities are derived based on the correlations between the attenuation of u-band luminosities and WISE. 12 (or 22) mu m luminosities, and then calibrated with the Balmer-corrected Ha luminosities. The systematic residuals of these calibrations are tested against the physical properties over the ranges covered by our sample objects. We find that the best-fitting nonlinear relations are better than the linear ones and recommended to be applied in the measurement of SFRs. The systematic deviations mainly come from the pollution of old stellar population and the effect of dust extinction; therefore,. a. more detailed analysis is needed in future work. |
| URI | http://hdl.handle.net/20.500.11897/475640 |
| ISSN | 0004-637X |
| DOI | 10.3847/1538-4357/835/1/70 |
| Indexed | SCI(E) |
| Appears in Collections: | 科维理天文与天体物理研究所 |
