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J/A+A/382/184     Crystalline silicates around evolved stars    (Molster+, 2002)

Crystalline silicate dust around evolved stars. I. The sample stars. Molster F.J., Waters L.B.F.M., Tielens A.G.G.M., Barlow M.J. <Astron. Astrophys. 382, 184 (2002)> =2002A&A...382..184M
ADC_Keywords: Stars, giant ; Planetary nebulae ; Mass loss ; Spectra, infrared Keywords: infrared: stars - circumstellar matter - stars: AGB and post-AGB - mass loss - planetary nebulae: general - dust, extinction Abstract: This is the first paper in a series of three where we present the first comprehensive inventory of solid state emission bands observed in a sample of 17 oxygen-rich circumstellar dust shells surrounding evolved stars. The data were taken with the Short and Long Wavelength Spectrographs on board of the Infrared Space Observatory (ISO) and cover the 2.4 to 195µm wavelength range. The spectra show the presence of broad 10 and 18µm bands that can be attributed to amorphous silicates. In addition, at least 49 narrow bands are found whose position and width indicate they can be attributed to crystalline silicates. Almost all of these bands were not known before ISO. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 51 17 Star positions (from Simbad) table4.dat 60 36 IRAS 09425-6040 measured IR spectral features table5.dat 60 47 NGC 6537 measured IR spectral features table6.dat 60 42 NGC 6302 measured IR spectral features table7.dat 60 64 MWC 922 measured IR spectral features table8.dat 60 40 AC Her measured IR spectral features table9.dat 60 46 HD 45677 measured IR spectral features table10.dat 60 28 89 Her measured IR spectral features table11.dat 60 35 MWC 300 measured IR spectral features table12.dat 60 50 HD 44179 measured IR spectral features table13.dat 60 27 Roberts 22 measured IR spectral features table14.dat 60 18 *VY 2-2 measured IR spectral features table15.dat 60 38 HD 161796 measured IR spectral features table16.dat 60 35 OH 26.5+0.6 measured IR spectral features table17.dat 60 33 HD 179821 measured IR spectral features table18.dat 60 36 AFGL 4106 measured IR spectral features table19.dat 60 30 NML Cyg measured IR spectral features table20.dat 60 37 IRC+10420 measured IR spectral features
Note on table14.dat: Because of the uncertainty of the continuum in VY2-2 at the LWS wavelengths (>45µm) no I(peak)/I(cont) is given for these features.
See also: J/A+A/293/833 : Circumstellar silicate grains (David+, 1995) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 2 I2 --- tno Table number for the star data 4- 18 A15 --- Name Star name 20- 21 I2 h RAh Right ascension (J2000.0) 23- 24 I2 min RAm Right ascension (J2000.0) 26- 29 F4.1 s RAs Right ascension (J2000.0) 31 A1 --- DE- Declination sign (J2000.0) 32- 33 I2 deg DEd Declination (J2000.0) 35- 36 I2 arcmin DEm Declination (J2000.0) 38- 39 I2 arcsec DEs Declination (J2000.0) 42- 51 A10 --- OName Other name
Byte-by-byte Description of file: table*.dat
Bytes Format Units Label Explanations
1- 5 F5.2 um lambda Wavelength of the feature 9- 12 F4.2 um e_lambda Error on the wavelength (1 σ) 14- 18 F5.2 um FWHM FWHM of the feature 22- 25 F4.2 um e_FWHM Error on the FWHM (1 σ) 28- 32 F5.3 --- I(p)/I(c) ?=0.000 I(peak)/I(cont) 35- 39 F5.3 --- e_I(p)/I(c) ?=0.000 Error on the I(peak)/I(cont) (1σ) 43- 50 E8.2 W/m2 F(band) Flux in the band (negative is absorption) 54- 59 E6.2 W/m2 e_F(band) Error on the Flux in the band (1 σ)
Acknowledgements: Frank Molster References: Waters et al., 1998A&A...331L..61W
(End) Frank Molster [ESA/ESTEC], Patricia Bauer [CDS] 16-Nov-2001
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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