2002PASP..114...25K


Query : 2002PASP..114...25K

2002PASP..114...25K - Publ. Astron. Soc. Pac., 114, 25-28 (2002/January-0)

The evolution of galactic beryllium and boron traced by magnesium and calcium. (Letter).

KING J.R.

Abstract (from CDS):

Beryllium and boron abundances are consistently derived on the parameter scale of two recent uniform stellar Mg and Ca abundance studies, one utilizing non-LTE parameters and abundances, the other assuming LTE. The results are used to explore the BeB-Mg and BeB-Ca relations at low metallicity as urged by B. D. Fields and coworkers. The slopes of all logarithmic BeB-MgCa relations, regardless of light element (Be or B), metallicity tracer (Mg or Ca), or parameter scale (non-LTE or LTE), are found to lie in the range 1.1-1.3. These results using the α-elements Mg and Ca confirm the need for a metal-poor ``primary'' BeB production mechanism (perhaps in addition to standard Galactic cosmic rays) previously inferred from BeB-Fe and questioned BeB-O relations.

Abstract Copyright: ∼

Journal keyword(s): ISM: Cosmic Rays - Galaxy: Abundances - Galaxy: Halo - nuclear reactions, nucleosynthesis, abundances - Stars: Abundances - Stars: Population II

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 HD 94028 PM* 10 51 28.1256073369 +20 16 38.965439278 8.51 8.69 8.22 7.82 7.54 F8 375 0
2 Wolf 1492 Pe* 13 40 02.4921849768 -00 02 18.750053436 11.601 11.832 11.451 11.184 10.892 sdF0: 299 0
3 BD+23 3130 Pe* 17 32 41.6247211304 +23 44 11.625460773     8.9 8.6   G0III 144 0
4 HD 338529 PM* 19 32 31.9104668184 +26 23 26.117367216   9.72   9.2   B5 213 0
5 HD 184499 PM* 19 33 27.0808591023 +33 12 06.719255906 7.22 7.22 6.64 6.14 5.79 G0V 256 0

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