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

We have identified 484 lines of the trans-iron elements (TIEs) Zn, Ga, Ge,Se, Br, Kr, Sr, Zr, Mo, In, Te, I, Xe, and Ba, for the first time in theultraviolet spectrum of a DAO-type WD, namely BD$-22{^\circ}3467$, surroundedby the ionized nebula Abell 35. Our TIE abundance determination shows extremelyhigh overabundances of up to five dex -- a similar effect is already known fromhot, H-deficient (DO-type) white dwarfs. In contrast to these where apulse-driven convection zone has enriched the photosphere with TIEs during afinal thermal pulse and radiative levitation has established the extreme TIEoverabundances, {here the extreme TIE overabundances are exclusively driven byradiative levitation on the initial stellar metallicity. The very low mass($0.533^{+0.040}_{-0.025}\,M_\odot$) of BD$-22{^\circ}3467$ implies that athird dredge-up with enrichment of s-process elements in the photosphere didnot occur in the AGB precursor.

First discovery of trans-iron elements in a DAO-type white dwarf (BD$-22{^\circ}3467$)