2. Solar Abundances of the H, C, N and O Atoms Deduced from Molecular Abundances
نویسندگان
چکیده
منابع مشابه
Helioseismology and Solar Abundances
Helioseismology has allowed us to study the structure of the Sun in unprecedented detail. One of the triumphs of the theory of stellar evolution was that helioseismic studies had shown that the structure of solar models is very similar to that of the Sun. However, this agreement has been spoiled by recent revisions of the solar heavy-element abundances. Heavy element abundances determine the op...
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Aims. We present abundance measurements of several elements Al, Cr, Si) for 20 solar–type stars belonging to four Galactic open clusters: NGC 3680, IC 4651, Praesepe and M 67. Oxygen abundances were also measured for most of the stars in each cluster but IC 4651. For NGC 3680 accurate abundance determination using high–resolution spectra covering a large spectral domain are computed for the fir...
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A solar photospheric “thermal profiling” analysis is presented, exploiting the infrared (2.3–4.6 μm) rovibrational bands of carbon monoxide (CO) as observed with the McMath-Pierce Fourier transform spectrometer (FTS) at Kitt Peak, and from above the Earth’s atmosphere by the Shuttle-borne ATMOS experiment. Visible continuum intensities and center-limb behavior constrained the temperature profil...
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New abundance tables have been compiled for Cl chondrites and the solar photosphere and corona, based on a critical review of the literature to mid-1988. The meteorite data are generally accurate to +5-10%. Significant discrepancies between Sun and meteorites occur only for Fe, Mn, Ge, Pb, and W; other well-determined elements agree to &90/o on the average. There is no evidence for group fracti...
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ژورنال
عنوان ژورنال: Transactions of the International Astronomical Union
سال: 1950
ISSN: 0251-107X
DOI: 10.1017/s0251107x00014139