The Galactic extinction and reddening from the South Galactic Cap U-band Sky Survey: u band galaxy number counts and $u-r$ color distribution

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 \citet{Schlegel1998}(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 $\Delta E(B-V)=0.43[E(B-V{)}^{SFD}-0.12$]. By combing the results of galaxy number counts and color distribution together, we find that the shape of the Galactic extinction curve is in good agreement with the standard $R_V=3.1$ extinction law of \cite{ODonnell1994}.

References in corpus (3)

• A cluster finding algorithm based on the multiband identification of red sequence galaxies
• Spatial Variations of Galaxy Number Counts in the Sloan Digital Sky Survey. II. Test of Galactic Extinction in High Extinction Regions
• The highly obscured region around PKS1343-601 - I. Galactic interstellar extinctions using DENIS galaxy colours

Cited by in corpus (5)

• The LSST DESC DC2 Simulated Sky Survey
• The Impact of Observing Strategy on Cosmological Constraints with LSST
• Validations and Corrections of the SFD and Planck Reddening Maps Based on LAMOST and Gaia Data
• The Chocolate Chip Cookie Model: dust-to-metal ratio of HII regions
• Simultaneous Estimation of Large-Scale Structure and Milky Way Dust Extinction from Galaxy Surveys