English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This paper presents an all-sky model of dust emission from the Planck 857,545 and 353 GHz, and IRAS 100 micron data. Using a modified black-body fit tothe data we present all-sky maps of the dust optical depth, temperature, andspectral index over the 353-3000 GHz range. This model is a tightrepresentation of the data at 5 arc min. It shows variations of the order of 30% compared with the widely-used model of Finkbeiner, Davis, and Schlegel. ThePlanck data allow us to estimate the dust temperature uniformly over the wholesky, providing an improved estimate of the dust optical depth compared toprevious all-sky dust model, especially in high-contrast molecular regions. Anincrease of the dust opacity at 353 GHz, tau_353/N_H, from the diffuse to thedenser interstellar medium (ISM) is reported. It is associated with a decreasein the observed dust temperature, T_obs, that could be due at least in part tothe increased dust opacity. We also report an excess of dust emission at HIcolumn densities lower than 10^20 cm^-2 that could be the signature of dust inthe warm ionized medium. In the diffuse ISM at high Galactic latitude, wereport an anti-correlation between tau_353/N_H and T_obs while the dustspecific luminosity, i.e., the total dust emission integrated over frequency(the radiance) per hydrogen atom, stays about constant. The implication is thatin the diffuse high-latitude ISM tau_353 is not as reliable a tracer of dustcolumn density as we conclude it is in molecular clouds where the correlationof tau_353 with dust extinction estimated using colour excess measurements onstars is strong. To estimate Galactic E(B-V) in extragalactic fields at highlatitude we develop a new method based on the thermal dust radiance, instead ofthe dust optical depth, calibrated to E(B-V) using reddening measurements ofquasars deduced from Sloan Digital Sky Survey data.

Planck 2013 results. XI. All-sky model of thermal dust emission