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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 (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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 108 101726 The derived spectrophotometric distances and extinctions with our Bayesian method for APOGEE stars
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
Bytes Format Units Label Explanations
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 <d> ?=-9999 Mean derived distance 55- 64 F10.4 kpc e_<d> ?=-9999 rms uncertainty on <d> 66- 75 F10.4 mas <plx> ?=-9999 Derived mean parallax 77- 86 F10.4 mas e_<plx> ?=-9999 rms uncertainty on <plx> 88- 97 F10.4 mag AKs ?=-9999 Estimated extinction in Ks band 99-108 F10.4 mag e_AKs ?=-9999 rms uncertainty on AKs
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Nov-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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