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II/354 HIP & Gaia DR1 TGAS MS & giants reddening & extinction (Gontcharov+ 2018)
The following files can be converted to FITS (extension .fit or fit.gz)
tgasext.dat hipext.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=II/354
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Beginning of ReadMe :II/354 HIP and TGAS stars reddening and extinction (Gontcharov+ 2018)
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Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars.
Verifying reddening and extinction for Gaia DR1 TGAS giants.
Gontcharov G.A., Mosenkov A.V.
<Mon. Not. R. Astron. Soc. 472, 3805 (2017) and 475, 1121 (2018) >
=2018yCat.2354....0G
=2017MNRAS.472.3805G
+2018MNRAS.475.1121G
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ADC_Keywords: Extinction ; Interstellar medium ; Milky Way ; Reddening
Keywords: color-magnitude diagram - interstellar medium -
Galactic solar neighborhoods - dark clouds - stellar reddening -
interstellar extinction - Milky Way Galaxy
Abstract:
These reddening and interstellar extinction estimates are a result of
a series of studies presented in the papers 2009AstL...35..780G,
2010AstL...36..584G, 2012AstL...38...12G, 2012AstL...38...87G,
2017AstL...43..472G and finally 2017MNRAS.472.3805G and
2018MNRAS.475.1121G. The key basis of these estimates is the 3D
reddening map of Gontcharov (2017AstL...43..472G, 2017PAZh...43..521G,
Cat. J/PAZh/43/521). This map has been tested among eight sources of
reddening and extinction estimates for nearly 60,000 Gaia DR1 TGAS
main sequence stars younger than 3Gyr with a relative error of the
Gaia parallax less than 0.1. The sources are tested in their ability
to put the stars among the PARSEC and MIST theoretical isochrones in
the Hertzsprung-Russell diagram based on the precise Gaia, Tycho-2,
2MASS and WISE photometry. The 3D reddening map of Gontcharov provides
both the minimal number of outliers bluer than any reasonable
isochrone and the correct number of stars younger than 3Gyr in
agreement with the Besancon Galaxy model. In another test Gaia DR1
TGAS parallaxes, Tycho-2 photometry and reddening/extinction estimates
from nine data sources for 38,074 giants within 415pc from the Sun
are used to compare their position in the Hertzsprung-Russell diagram
with theoretical estimates, which are based on the PARSEC and MIST
isochrones and the TRILEGAL model of the Galaxy with its parameters
being widely varied. We conclude that, again, the estimates from the
3D reddening map of Gontcharov, including the median reddening
E(B-V)=0.06mag at |b|>50deg, give the best fit of the empirical and
theoretical data with each other. Based on these studies we present
here the best up-to-date reddening, extinction and
extinction-to-reddening estimates for the Gaia DR1 TGAS and Hipparcos
stars within 415pc from the Sun. The accuracy of the E(B-V) estimates
is proved to be better than 0.04mag everywhere in this space.
Description:
These are the reddening, interstellar extinction and
extinction-to-reddening ratio estimates interpolated for 730,496 Gaia
DR1 TGAS and Hipparcos stars within 415 pc from the Sun based on the
3D reddening map of Gontcharov (J/PAZh/43/521) and 3D
extinction-to-reddening (total-to-selective extinction) ratio
Rv=Av/E(B-V) map of Gontcharov (J/PAZh/38/15). For 711,237 Gaia DR1
TGAS stars the rMoMW distances from Astraatmadja and Bailer-Jones
(2016ApJ...833..119A, Cat. J/ApJ/833/119) are used.
For 19,259 Hipparcos stars, not in Gaia DR1 TGAS, the distances as the
inversion of Hipparcos (I/311) parallaxes are used. The E(B-V) are
calculated from initial E(J-Ks) as
E(B-V)=E(J-Ks)*(0.047X^3-0.1X^2-0.09X+1.74), where X=(B_T-V_T) (B_T
and V_T Tycho-2 bands) following the extinction law. This refined
relation supersedes E(B-V)=1.655E(J-Ks) in the original 3D reddening
map of Gontcharov. The Rv are interpolated from the 3D map of Rv of
Gontcharov (2012AstL...38...12G, 2012PAZh...38...15G, Cat.
J/PAZh/38/15). The Av are the product of E(B-V) and Rv.