Spatial variations of galaxy number counts in the sloan digital sky survey. II. Test of Galactic extinction in high-extinction regions

Naoki Yasuda, Masataka Fukugita, Donald P. Schneider

Research output: Contribution to journalReview article

22 Scopus citations


Galactic extinction is tested using galaxy number counts at low Galactic latitude obtained from five-band photometry of the Sloan Digital Sky Survey. The spatial variation of galaxy number counts for low-extinction regions of E(B -V) < 0.15 is consistent with the all-sky reddening map of Schlegel and coworkers and the standard extinction law. For higher extinction regions of E(B -V) > 0.15, however, the map of Schlegel and coworkers overestimates the reddening by a factor of up to 1.4, which can likely be ascribed to the departure from proportionality of reddening to infrared emissivity of dust. This result is consistent with the analysis of Arce & Goodman for the Taurus dark cloud complex.

Original languageEnglish (US)
Pages (from-to)698-705
Number of pages8
JournalAstronomical Journal
Issue number2
StatePublished - Aug 2007


All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this