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J/A+A/317/503    Photometric & visibility data of IRC +10 216 (Groenewegen 1997)

IRC+10 216 revisited I: the circumstellar dust shell Groenewegen M.A.T <Astron. Astrophys. 317, 503 (1997)> =1997A&A...317..503G (SIMBAD/NED BibCode)
ADC_Keywords: Infrared sources ; Stars, variable Keywords: circumstellar matter - stars: individual: IRC +10 216 - stars: mass loss - stars: AGB, post-AGB - infrared: stars Description: A spherically symmetric dust radiative transfer code is used to model the circumstellar dust shell around IRC +10 216. Compared to numerous previous models a much larger body of observational data is used as constraints; the spectral energy distribution between 0.5 and 60000µm, 2-4µm and 8-23µm spectra, optical, far-infrared and centimeter sizes and interferometric visibility curves between 1.6 and 11.2µm are used to constrain the model. The most important result is that in order to fit the visibility curve at 2.2µm and the size of the shell in the optical, scattering has to be invoked. Objects: ------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------- 09 47 57.2 +13 16 44 IRC +10216 = CW Leo ------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file appen.tex 80 88 LaTeX version of Appendix table1 145 13 Summary of existing models of IRC +10 216 table2 123 88 Photometric data used in the modeling table3 94 13 Visibility data tables.tex 144 244 LaTeX version of the tables fig11.ps 60 108 Geometry of the problem
Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 5 A5 --- Ref Reference (1) 7- 10 I4 K Teff Effective temperature or lowest value if interval of the central star 11 A1 --- n_Teff [A-] Note on Teff (2) 12- 15 I4 --- Teff2 ? Highest effective temperature when interval 17- 28 A12 --- Depth Optical depth 30- 34 F5.2 --- Radc ? Inner radius or lowest value if interval of the dust shell in stellar radii 35 A1 --- n_Radc Note on Radc (2) 36- 38 F3.1 --- Radc2 ? Highest inner radius when interval 41- 44 I4 K Tc ? Dust temperature at the inner dust radius 45 A1 --- n_Tc Note on Tc (2) 47- 90 A44 --- Grains Type of grain used 92- 95 F4.1 --- DensLaw ? r power number of the density law 96 A1 --- n_DensLaw [bce] Note on DensLaw (3) 98-103 I6 solLum/kpc2 L/D2 ? Luminosity versus square distance 104 A1 --- n_L/D2 '?' for unknown value 106-145 A40 --- Const Constraints used (4)
Note (1): The references are: MR80 = Mitchell & Robinson (1980MNRAS.190..669M) RRH83 = Rowan-Robinson & Harris (1983MNRAS.202..797R) MR87 = Martin & Rogers (1987ApJ...322..374M) LB87 = Le Bertre (1987A&A...176..107L) LB88 = Le Bertre (1988A&A...203...85L) RK88 = Ridgway & Keady (1988ApJ...326..843R) G90 = Griffin (1990MNRAS.247..591G) O90 = Orofino et al. (1990A&A...231..105O) LML93 = Lorenz-Martins & Lefevre (1993A&A...280..567L) D94 = Danchi et al. (1994AJ....107.1469D) W94 = Winters et al. (1994A&A...288..255W) B95 = Bagnulo et al. (1995A&A...301..501B) IE96 = Ivezic & Elitzur (1996MNRAS.279.1011I) Note (2): A means that the parameter value was assumed - indicates an interval ? for unknown value Note (3): b: fpr r≤10R* c: Calculated from first principle e: Density distribution calculated taking a constant mass lost rate and a hydrodynamical calculation to determine the velocity law Note (4): SED = spectral energy distribution LRS = low resolution spectrograph
Byte-by-byte Description of file: table2
Bytes Format Units Label Explanations
1- 24 A24 --- Ref Reference 26- 32 F7.2 um Lambda Wavelength 33 A1 --- n_Lambda '-' when interval 34- 35 I2 um Lambda2 ? Highest wavelength when interval 37- 48 E12.2 --- Flux ? Flux (see unit in X_Flux) 51- 55 F5.1 --- e_Flux ? rms uncertainty on Flux 57- 62 A6 --- x_Flux Units of flux and e_Flux 64- 68 F5.1 arcsec Beam ? Beam size 69 A1 --- n_Beam [?x]? for unknown value; x for box beam 70- 71 I2 arcsec Beam2 ? Second value when box beam (AxB) 74- 77 F4.2 --- Phase [0/1[? Phase (1) 78 A1 --- n_Phase [?-] ? for unknown value; - when interval 79- 82 F4.2 --- Phase2 ? Highest values when interval 84-123 A40 --- Rem Remarks
Note (1): The phase is calculated adopting a period of 649 days and maximum light (phase=0.0) at JD = 2447483 (Le Bertre, 1992A&AS...94..377L).
Byte-by-byte Description of file: table3
Bytes Format Units Label Explanations
1- 5 F5.2 um Lambda Wavelength 7- 28 A22 --- Ref Reference 30- 33 F4.2 --- Phase1 [0/1[ Phase (1) 34 A1 --- n_Phase1 '-' when interval 35- 38 F4.2 --- Phase1b [0/1.25]? Upper value when interval 40- 43 F4.2 --- Phase2 [0/1[? Second values for the phase 45- 48 F4.2 --- Phase3 [0/1[? Third values for the phase 50- 94 A45 --- Rem Remarks
Note (1): The phase is calculated adopting a period of 649 days and maximum light (phase = 0.0) at JD = 2447483 (Le Bertre, 1992A&AS...94..377L).
Acknowledgements: Martin Groenewegen
(End) Patricia Bauer [CDS] 07-Jun-1996
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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