English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Abundances of 21 elements in two 3He stars HD 185330 and 3 Cen A have beenanalysed relative to the well studied sharp-lined B3 V star iota Her. Sixelements (P, Ti, Mn, Fe, Ni, and Br) are over-abundant in these two peculiarstars, while six elements (C, O, Mg, Al, S, and Cl) are under-abundant.Absorption lines of the two rarely observed heavy elements Br II and Kr II aredetected in both stars and these elements are both over-abundant. The centroidwavelengths of the Ca II infrared triplet lines in these stars are red-shiftedrelative to those lines in iota Her and the presence of heavy isotopes of Ca(mass number 44 - 46) in these two stars are confirmed. In spite of thesesimilarities, there are several remarkable differences in the abundance patternbetween these two stars. N is under-abundant in HD 185330, as in many Hg-Mnstars, while it is significantly over-abundant in 3 Cen A. P and Ga are bothover-abundant in 3 Cen A, while only P is over-abundant and no trace ofabsorption line of Ga II can be found in HD 185330. Large over-abundances of Krand Xe are found in both stars, while the abundance ratios Kr / Xe aresignificantly different between them (-1.4 dex in HD 185330 and +1.2 dex in 3Cen A). Some physical explanations are needed to account for these qualitativedifferences.

Spectroscopic abundance analyses of the 3He stars HD 185330 and 3 Cen A