J/A+A/585/A38 All-sky extinction maps (Juvela+, 2016)
Allsky NICER and NICEST extinction maps based on the 2MASS near-infrared survey.
Juvela M., Montillaud J.
<Astron. Astrophys. 585, A38 (2016)>
=2016A&A...585A..38J 2016A&A...585A..38J (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Extinction
Keywords: ISM: clouds - infrared: ISM - submillimeter: ISM - dust, extinction -
stars: formation
Abstract:
Extinction remains one of the most reliable methods of measuring
column density of nearby Galactic interstellar clouds. The current and
ongoing near-infrared surveys enable the mapping of extinction over
large sky areas.
We produce allsky extinction maps using the 2MASS near-infrared
survey.
We use the NICER and NICEST methods to convert the near-infrared
colour excesses to extinction estimates. The results are presented in
Healpix format at the resolutions of 3.0, 4.5, and 12.0-arcmin.
Description:
All-sky extinction maps in units of J-band extinction (magnitudes).
Data are given as Healpix FITS files (NSIDE=2048, NESTED scheme) in
Galactic projection. The maps have been created either with the NICER
or the NICEST method and at a resolution of either 3.0, 4.5, or
12.0-arcmin (FWHM). The different versions (M1, M2a, M2b) correspond
to different assumptions of intrinsic stellar colours.
These were M1 (average statistics at high latitudes, |b|>60°) and
two versions, M2a and M2b, based on Besancon model of the Galactic
distribution of stars with different intrinsic colours (M2a using the
intrinsic colours, M2b colours further reddened by a simple model of
diffuse extinction).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 82 12 List of fits files
fits/* . 12 Individual fits files
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- N Number of extinction map
7- 12 I6 Kibyte size Size of the fits file
14- 39 A26 --- FileName Name of the fits file in subdirectory fits
41- 82 A42 --- Title Title of the file
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Acknowledgements:
Mika Juvela, mika.juvela(at)helsinki.fi
(End) Patricia Vannier [CDS] 30-Oct-2015