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Title: SCUSS u- BAND EMISSION AS A STAR-FORMATION-RATE INDICATOR

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{sup 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 α , 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 H α luminosities with an rms scatter of ∼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) μ m luminosities, and then calibrated with the Balmer-corrected H α 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 frommore » the pollution of old stellar population and the effect of dust extinction; therefore, a more detailed analysis is needed in future work.« less

Authors:
; ; ; ; ; ; ; ; ; ;  [1]; ;  [2];  [3]; ;  [4];  [5]
  1. Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012 (China)
  2. Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States)
  3. Center for Astronomy and Astrophysics, Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China)
  4. Shanghai Astronomical Observatory, Chinese Academy of Science, 80 Nandan Road, Shanghai 200030 (China)
  5. Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871 (China)
Publication Date:
OSTI Identifier:
22664032
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 835; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ATTENUATION; CALIBRATION; CORRELATIONS; EMISSION; GALAXIES; INFRARED SURVEYS; LUMINOSITY; NONLINEAR PROBLEMS; STAR EVOLUTION; STARS

Citation Formats

Zhou, Zhimin, Zhou, Xu, Wu, Hong, Fan, Zhou, Jiang, Zhao-Ji, Ma, Jun, Nie, Jun-Dan, Wang, Jia-Li, Wu, Zhen-Yu, Zhang, Tian-Meng, Zou, Hu, Fan, Xiao-Hui, Lesser, Michael, Jing, Yi-Peng, Li, Cheng, Shen, Shi-Yin, and Jiang, Lin-Hua, E-mail: zmzhou@bao.ac.cn. SCUSS u- BAND EMISSION AS A STAR-FORMATION-RATE INDICATOR. United States: N. p., 2017. Web. doi:10.3847/1538-4357/835/1/70.
Zhou, Zhimin, Zhou, Xu, Wu, Hong, Fan, Zhou, Jiang, Zhao-Ji, Ma, Jun, Nie, Jun-Dan, Wang, Jia-Li, Wu, Zhen-Yu, Zhang, Tian-Meng, Zou, Hu, Fan, Xiao-Hui, Lesser, Michael, Jing, Yi-Peng, Li, Cheng, Shen, Shi-Yin, & Jiang, Lin-Hua, E-mail: zmzhou@bao.ac.cn. SCUSS u- BAND EMISSION AS A STAR-FORMATION-RATE INDICATOR. United States. doi:10.3847/1538-4357/835/1/70.
Zhou, Zhimin, Zhou, Xu, Wu, Hong, Fan, Zhou, Jiang, Zhao-Ji, Ma, Jun, Nie, Jun-Dan, Wang, Jia-Li, Wu, Zhen-Yu, Zhang, Tian-Meng, Zou, Hu, Fan, Xiao-Hui, Lesser, Michael, Jing, Yi-Peng, Li, Cheng, Shen, Shi-Yin, and Jiang, Lin-Hua, E-mail: zmzhou@bao.ac.cn. Fri . "SCUSS u- BAND EMISSION AS A STAR-FORMATION-RATE INDICATOR". United States. doi:10.3847/1538-4357/835/1/70.
@article{osti_22664032,
title = {SCUSS u- BAND EMISSION AS A STAR-FORMATION-RATE INDICATOR},
author = {Zhou, Zhimin and Zhou, Xu and Wu, Hong and Fan, Zhou and Jiang, Zhao-Ji and Ma, Jun and Nie, Jun-Dan and Wang, Jia-Li and Wu, Zhen-Yu and Zhang, Tian-Meng and Zou, Hu and Fan, Xiao-Hui and Lesser, Michael and Jing, Yi-Peng and Li, Cheng and Shen, Shi-Yin and Jiang, Lin-Hua, E-mail: zmzhou@bao.ac.cn},
abstractNote = {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{sup 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 α , 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 H α luminosities with an rms scatter of ∼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) μ m luminosities, and then calibrated with the Balmer-corrected H α 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.},
doi = {10.3847/1538-4357/835/1/70},
journal = {Astrophysical Journal},
number = 1,
volume = 835,
place = {United States},
year = {Fri Jan 20 00:00:00 EST 2017},
month = {Fri Jan 20 00:00:00 EST 2017}
}