J/A+A/564/A84 WISE model grids for O- and C-rich AGB (Lian+, 2014)
Characterizing AGB stars in Wide-field Infrared Survey Explorer (WISE) bands.
Lian J., Zhu Q., Kong X., He J.
<Astron. Astrophys. 564, A84 (2014)>
=2014A&A...564A..84L 2014A&A...564A..84L
ADC_Keywords: Models ; Stars, carbon ; Photometry, infrared
Keywords: stars: AGB and post-AGB - stars: carbon - stars:evolution -
infrared: stars - radiative transfer
Abstract:
Since asymptotic giant branch (AGB) stars are bright and extended
infrared objects, most Galactic AGB stars saturate the Wide-field
Infrared Survey Explorer (WISE) detectors and therefore the WISE
magnitudes that are restored by applying point-spread-function fitting
need to be verified. Statistical properties of circumstellar envelopes
around AGB stars are discussed on the basis of a WISE AGB catalog
verified in this way.
We cross-matched an AGB star sample with the WISE All-Sky Source
Catalog and the Two Mircon All Sky Survey catalog. Infrared Space
Observatory (ISO) spectra of a subsample of WISE AGB stars were also
exploited. The dust radiation transfer code DUSTY was used to help
predict the magnitudes in the W1 and W2 bands, the two WISE bands most
affected by saturation, for calibration purpose, and to provide
physical parameters of the AGB sample stars for analysis.
Description:
Synthetic photometry and input parameters for Orich and Crich AGB
stars model grid. The model grid is generated by DUSTY code. Four
parameters are set free to generate the model grid: stellar effective
temperature; dust composition; temperature at inner boundary of dust
envelope; optical depth. The ranges of the four parameters and fixed
value of other input parameters could be found in the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
grid_c.dat 100 1015 Model grid for C-rich
grid_o.dat 100 1015 Model grid for O-rich
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Byte-by-byte Description of file: grid_c.dat grid_o.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 mag J 2MASS J-band photometry of model grid
11- 18 F8.4 mag H 2MASS H-band photometry of model grid
20- 27 F8.4 mag K 2MASS K-band photometry of model grid
29- 36 F8.4 mag W1 WISE W1 band photometry of model grid
38- 45 F8.4 mag W2 WISE W2 band photometry of model grid
47- 54 F8.4 mag W3 WISE W3 band photometry of model grid
56- 63 F8.4 mag W4 WISE W4 band photometry of model grid
65- 71 F7.2 K Teff [2100/4500] Stellar effective temperature
73- 79 F7.5 --- X [1] Ratio between dust composition (1)
81- 88 F8.3 K Tin [600/1400] Temperature at inner boundary
90-100 F11.7 --- tau [0.01/100] Optical depth τ
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Note (1): A composition ratio parameter X was defined to specify the number
ratio of the two types of dust particles.
In O-rich AGB stars, X=silicate/(silicate+Al2O3);
in C-rich AGB stars, X=AmC/(AmC+SiC) (AmC is amorphous Carbon)
See paper for more details.
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Acknowledgements:
Jianhui Lian, ljhhw(at)mail.ustc.edu.cn
(End) Jianhui Lian [USTC, China], Patricia Vannier [CDS] 21-Feb-2014