Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2018

Galactic reddening in 3D from stellar photometry – an improved map

Gregory Green
  • Function : Author
Edward Schlafly
  • Function : Author
Douglas Finkbeiner
  • Function : Author
Hans-Walter Rix
William Burgett
  • Function : Author
Peter Draper
  • Function : Author
Heather Flewelling
  • Function : Author
Klaus Hodapp
Nicholas Kaiser
  • Function : Author
Rolf-Peter Kudritzki
  • Function : Author
Eugene Magnier
  • Function : Author
Nigel Metcalfe
  • Function : Author
John Tonry
  • Function : Author
Richard Wainscoat
  • Function : Author
Christopher Waters
  • Function : Author

Abstract

We present a new 3D map of interstellar dust reddening, covering three quarters of the sky (declinations of δ −30 •) out to a distance of several kiloparsecs. The map is based on highquality stellar photometry of 800 million stars from Pan-STARRS 1 and 2MASS. We divide the sky into sightlines containing a few hundred stars each, and then infer stellar distances and types, along with the line-of-sight dust distribution. Our new map incorporates a more accurate average extinction law and an additional 1.5 yr of Pan-STARRS 1 data, tracing dust to greater extinctions and at higher angular resolutions than our previous map. Out of the plane of the Galaxy, our map agrees well with 2D reddening maps derived from far-infrared dust emission. After accounting for a 25 per cent difference in scale, we find a mean scatter of ∼10 per cent between our map and the Planck far-infrared emission-based dust map, out to a depth of 0.8 mag in E(g P1 − r P1), with the level of agreement varying over the sky. Our map can be downloaded at http://argonaut.skymaps.info, or from the Harvard Dataverse (Green 2017).

Fichier principal
Vignette du fichier
sty1008.pdf (13.3 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive
Licence

Dates and versions

hal-03154963 , version 1 (01-03-2021)

Licence

Identifiers

Cite

Gregory Green, Edward Schlafly, Douglas Finkbeiner, Hans-Walter Rix, Nicolas Martin, et al.. Galactic reddening in 3D from stellar photometry – an improved map. Monthly Notices of the Royal Astronomical Society, 2018, 478 (1), pp.651-666. ⟨10.1093/mnras/sty1008⟩. ⟨hal-03154963⟩
86 View
111 Download

Altmetric

Share

  • More