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J/AZh/75/586      Abundances in solar atmosphere         (Boyarchuk+, 1998)

Studies of the Sun as a standard for analysis of stellar atmospheric abundances Boyarchuk A.A., Antipova L.I., Boyarchuk M.E., Savanov I.S. <Astron. Zh. 75, 586 (1998)> =1998AZh....75..586B =1998ARep...42..517B
ADC_Keywords: Sun ; Spectroscopy ; Abundances Abstract: An analysis of the chemical composition of the solar atmosphere is performed using spectrograms of the daylight sky obtained on the ZTS telescope (dispersion 3Å/mm, signal-to-noise ration, S/N>100). The chemical composition derived in the framework of a Holweger-Muller atmosphere model are in excellent agreement with the generally accepted values. Analysis based on the models of Bell et al. (1976A&AS...23...37B) and Kurucz (1992RMxAA..23..181K) with Teff=5770K and logg=4.44 failed to give satisfactory results. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 51 225 Elemental abundances in the solar atmosphere table1b.dat 42 25 Chemical composition derived in the framework of Holweger-Muller, Bell et al. and Kurucz atmosphere models with Teff=5770K and logg=4.44
See also: J/AZh/72/864 : Abundances in gamma Sagittae (Boyarchuk+, 1995) J/AZh/72/855 : Abundances in eta Piscium (Antipova+, 1995) J/AZh/73/862 : Atmospheres of six red giants (Boyarchuk+, 1996) J/AZh/77/96 : Abundances in Hyades red giants (Boyarchuk+, 2000) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 A4 --- El Element 7- 13 F7.2 0.1nm Lambda Wavelength expressed in angstroem 16- 19 F4.2 eV ExcPot Excitation potentials of the lower level 22- 26 F5.2 --- loggf Oscillator strength (log gf) 29- 33 F5.3 0.1nm EW Equivalent width 36- 39 F4.2 --- logeHM Elemental abundance by HOLMU model (H=12) 42- 45 F4.2 --- logeB Elemental abundance by Bell et al. model (H=12) 48- 51 F4.2 --- logeK Elemental abundance by Kurucz model (H=12)
Byte-by-byte Description of file: table1b.dat
Bytes Format Units Label Explanations
1- 4 A4 --- El Element 6- 9 F4.2 --- logeHM Mean elemental abundance by HOLMU model (1) 11- 14 F4.2 --- e_logeHM ? rms uncertainty on logeHM 17- 20 F4.2 --- logeB Mean elemental abundance by Bell et al. (1) 22- 25 F4.2 --- e_logeB ? rms uncertainty on logeB 28- 31 F4.2 --- logeK Mean elemental abundance by Kurucz (1) 33- 36 F4.2 --- e_logeK ? rms uncertainty on logeK 39- 42 F4.2 --- logeS Mean elemental abundance by Anders & Grevesse (1)
Note (1): References: HOLMU model: Holweger & Mueller, 1974, Solar Phys. 39, 19 Bell et al. model: 1976A&AS...23...37B Kurucz model: 1992RMxAA..23..181K Anders & Grevesse model : 1989, Cosmochim. Acta 52, 197

(End) Veta Avedisova [INASAN] 03-Jun-2001
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