Heavy metal spectroscopy in extremely metal rich subdwarfs

L Fernández-Menchero, C P Ballance, C A Ramsbottom

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Synopsis: Helium-rich subdwarf B stars represent a small group of low-mass hot stars. A number of significant but unfamiliar absorption lines have been identified of heavy-metal ions, such as germanium, strontium, yttrium and zirconium. The abundances in the photosphere of theses element was estimated between 1000 and 10 000 times the solar. We calculate the collision-radiative data for the ions Sr+, Y2+ and Zr3+. Comparing with measured spectra we can determine these abundances. We compare the obtained results with the RMATRX and DARC methods.
Original languageEnglish
Pages (from-to)142029
JournalJournal of Physics: Conference Series
Issue number14
Publication statusPublished - 01 Jan 2020


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