J/A+A/641/A79 FEDReD. Extinction map with 2MASS and Gaia DR2 (Hottier+, 2020)
FEDReD. II. 3D extinction map with 2MASS and Gaia DR2 data.
Hottier C., Babusiaux C., Arenou F.
<Astron. Astrophys. 641, A79 (2020)>
=2020A&A...641A..79H 2020A&A...641A..79H (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Extinction
Keywords: dust, extinction - ISM: structure
Abstract:
We aim to map the 3D distribution of the interstellar extinction of
the Milky Way disk up to distances larger than those probed with the
Gaia parallaxes alone.
We apply the FEDReD algorithm to the 2MASS near-infrared photometry
together with the Gaia DR2 astrometry and photometry. This algorithm
uses a Bayesian deconvolution approach, based on an empirical
HR-diagram representative of the local thin disk, in order to map the
extinction as a function of distance for various fields of view.
We analysed more than 5.6 million stars to obtain an extinction map of
the entire Galactic disk within |b|<0.24°. This map provides
information up to 5kpc in the direction of the Galactic centre and at
more than 7kpc in the direction of the anticentre. This map reveals
the complete shape of structures known locally, such as the Vela
complex or the split of the local arm. Furthermore our extinction map
shows many large "clean bubbles" especially one in the
Sagittarius-Carina complex, and four others which define a structure
that we nickname the butterfly
Description:
Extinction and extinction density maps obtained with the FEDReD
algorithm (Babusiaux et al., 2020).
Each rows correspond to one distance and each columns correspond to
one galactic longitude at latitude b=0.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 64 5 List of fits extinction maps
fits/* . 5 Individual fits extinction maps
listtab.dat 97 5 List of tables in subdirectory tables
tables/* . 5 Individual tables in csv
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Nx Number of pixels along X-axis
6- 8 I3 --- Ny Number of pixels along Y-axis
10- 13 I4 Kibyte size Size of FITS file
15- 24 A10 --- FileName Name of FITS file, in subdirectory fits
26- 64 A39 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Byte-by-byte Description of file: listtab.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Table Table name, in subdirectory tables
12- 65 A54 --- Title Title of the table
67- 97 A31 --- Param Parameters in the table (1)
--------------------------------------------------------------------------------
Note (1): Extinctions a0i, A0i, A0Maxi, A0Mini and densities a0i for
i = GLON=0.11 to GLON=359.99 (for 3764 values).
--------------------------------------------------------------------------------
Acknowledgements:
Clement Hottier, clement.hottier(at)obspm.fr
(End) Patricia Vannier [CDS] 19-Aug-2020