GALACTIC EXTINCTION and REDDENING from the SOUTH GALACTIC CAP u-BAND SKY SURVEY: U-BAND GALAXY NUMBER COUNTS and u-r COLOR DISTRIBUTION

Linlin Li, Shiyin Shen, Jinliang Hou, Fangting Yuan, Jing Zhong, Hu Zou, Xu Zhou, Zhaoji Jiang, Xiyan Peng, Dongwei Fan, Xiaohui Fan, Zhou Fan, Boliang He, Yipeng Jing, Michael P Lesser, Cheng Li, Jun Ma, Jundan Nie, Jiali Wang, Zhenyu WuTianmeng Zhang, Zhimin Zhou

Research output: Contribution to journalArticle

Abstract

We study the integral Galactic extinction and reddening based on the galaxy catalog of the South Galactic Cap u-band Sky Survey (SCUSS), where u-band galaxy number counts and u-r color distribution are used to derive the Galactic extinction and reddening respectively. We compare these independent statistical measurements with the reddening map of Schlegel et al. (SFD) and find that both the extinction and reddening from the number counts and color distribution are in good agreement with the SFD results at low extinction regions (E (B - V)SFD < 0.12 mag). However, for high extinction regions (E (B - V)SFD > 0.12 mag), the SFD map overestimates the Galactic reddening systematically, which can be approximated by a linear relation E(B V) =0.43(E(B - V)SFD -0.12). By combining the results from galaxy number counts and color distribution, we find that the shape of the Galactic extinction curve is in good agreement with the standard RV = 3.1 extinction law of O'Donnell.

Original languageEnglish (US)
Article number88
JournalAstronomical Journal
Volume153
Issue number2
DOIs
StatePublished - Feb 1 2017

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Keywords

  • dust
  • extinction
  • methods: statistical
  • techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Li, L., Shen, S., Hou, J., Yuan, F., Zhong, J., Zou, H., Zhou, X., Jiang, Z., Peng, X., Fan, D., Fan, X., Fan, Z., He, B., Jing, Y., Lesser, M. P., Li, C., Ma, J., Nie, J., Wang, J., ... Zhou, Z. (2017). GALACTIC EXTINCTION and REDDENING from the SOUTH GALACTIC CAP u-BAND SKY SURVEY: U-BAND GALAXY NUMBER COUNTS and u-r COLOR DISTRIBUTION. Astronomical Journal, 153(2), [88]. https://doi.org/10.3847/1538-3881/153/2/88