J/MNRAS/460/3179 APOGEE stars distance and extinction (Wang+, 2016)
Distance and extinction determination for APOGEE stars with Bayesian method.
Wang J., Shi J., Pan K., Chen B., Zhao Y., Wicker J.
<Mon. Not. R. Astron. Soc., 460, 3179-3192 (2016)>
=2016MNRAS.460.3179W 2016MNRAS.460.3179W (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Stars, distances ; Parallaxes, trigonometric; Extinction
Keywords: stars: distances - stars: fundamental parameters - dust, extinction
Abstract:
Using a Bayesian technology, we derived distances and extinctions for
over 100000 red giant stars observed by the Apache Point Observatory
Galactic Evolution Experiment (APOGEE) survey by taking into account
spectroscopic constraints from the APOGEE stellar parameters and
photometric constraints from Two Micron All-Sky Survey, as well as a
prior knowledge on the Milky Way. Derived distances are compared with
those from four other independent methods, the Hipparcos parallaxes,
star clusters, APOGEE red clump stars, and asteroseismic distances
from APOKASC and Stromgren survey for Asteroseismology and Galactic
Archaeology catalogues. These comparisons covers four orders of
magnitude in the distance scale from 0.02 to 20kpc. The results show
that our distances agree very well with those from other methods: the
mean relative difference between our Bayesian distances and those
derived from other methods ranges from -4.2 per cent to +3.6 per cent,
and the dispersion ranges from 15 per cent to 25 per cent. The
extinctions towards all stars are also derived and compared with those
from several other independent methods: the Rayleigh-Jeans Colour
Excess (RJCE) method, Gonzalez's 2D extinction map, as well as 3D
extinction maps and models. The comparisons reveal that, overall,
estimated extinctions agree very well, but RJCE tends to overestimate
extinctions for cool stars and objects with low logg.
Description:
The APOGEE survey has generated high-resolution near-IR spectra for
over 105 stars. These data provide valuable information on the studies
for Galactic Archaeology. In order to fully exploit these data sets in
six dimension, we used a Bayesian method to derive the distances and
extinctions of individual stars by considering photometric and
spectroscopic information, as well as prior knowledge on the Milky
Way.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 108 101726 The derived spectrophotometric distances and
extinctions with our Bayesian method for
APOGEE stars
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See also:
J/AJ/146/133 : Stellar parameters from SDSS-III APOGEE DR10 (Meszaros+, 2013)
J/ApJ/819/2 : APOGEE kinematics. I. Galactic bulge overview (Ness+, 2016)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name APOGEE name (2MHHMMSSss+DDMMSSs)
20- 30 F11.7 deg RAdeg Right ascension (J2000)
32- 42 F11.7 deg DEdeg Declination (J2000)
44- 53 F10.4 kpc ?=-9999 Mean derived distance
55- 64 F10.4 kpc e_ ?=-9999 rms uncertainty on
66- 75 F10.4 mas ?=-9999 Derived mean parallax
77- 86 F10.4 mas e_ ?=-9999 rms uncertainty on
88- 97 F10.4 mag AKs ?=-9999 Estimated extinction in Ks band
99-108 F10.4 mag e_AKs ?=-9999 rms uncertainty on AKs
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Nov-2017