Three-dimensional Distribution of the Interstellar Dust in the Milky Way
Guo, H. -L. ; Chen, B. -Q. ; Yuan, H. -B. ; Huang, Y. ; Liu, D. -Z ; Yang, Y. ; Li, X. -Y. ; Sun, W. -X. ; Liu, X. -W.
We present a three-dimensional (3D) extinction map of the southern sky. The map covers the SkyMapper Southern Survey (SMSS) area of ∼14,000 deg2 and has spatial resolutions between 6'9 and 27'. Based on the multi-band photometry of SMSS, the Two Micron All Sky Survey, the Wide-Field Infrared Survey Explorer Survey, and the Gaia mission, we have estimated values of the r-band extinction for ∼19 million stars with the spectral energy distribution analysis. Together with the distances calculated from the Gaia data release 2 (DR2) parallaxes, we have constructed a 3D extinction map of the southern sky. By combining our 3D extinction map with those from the literature, we present an all-sky 3D extinction map, and use it to explore the 3D distribution of the Galactic dust grains. We use two different models, one consisting of a single disk and another of two disks, to fit the 3D distribution of the Galactic dust grains. The data is better fitted by a two-disk model, yielding smaller values of the Bayesian Information Criterion. The best-fit model has scale heights of 73 and 225 pc for the "thin" and "thick" dust disks, respectively.
Files
.. allskymap_EBV.fits
560MB
..
.. SkyMapper_stellar_Ar.fits
600MB
..
.. SkyMapperAr.fits
75MB
..
.. Gaint_locus.fits
14KB
..
.. Dwarf_locus.fits
16KB
..
.. dustmap_3D.py
1KB
..
Paper Information
Paper Title:
Three-Dimensional Distribution of the Interstellar Dust in the Milky Way
Publication:
arXiv e-prints
Bibcode:
2020arXiv201014092G
Identifiers
DOI:
10.12149/101033
VO Identifier:
ivo://China-VO/paperdata/101033
Publication Date:
2020-10-28
Citation Guidelines
Guo, H. -L. et al. 2020. Three-dimensional Distribution of the Interstellar Dust in the Milky Way. Version 1.0. https://doi.org/10.12149/101033
@misc{10.12149/101033,
doi = {10.12149/101033},
url = {https://doi.org/10.12149/101033},
author = {Guo, H. -L.},
title = {Three-dimensional Distribution of the Interstellar Dust in the Milky Way},
version = {1.0},
publisher = {Nataional Astronomical Data Center of China},
year= {2020}
}
Versions
Version 1.0 (current)
2020-10-28
Main
This DOI represents all versions, and will always resolve to the latest one.
2020-11-17