Heavy metal spectroscopy in extremely metal rich subdwarfs

Heavy metal spectroscopy in extremely metal rich subdwarfs

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 estimate...

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Veröffentlicht in:Journal of physics. Conference series 2020-01, Vol.1412 (14), p.142029
Hauptverfasser: Fernández-Menchero, L, Ballance, C P, Ramsbottom, C A
Format: Artikel
Sprache:eng
Schlagworte:
Abundance
B stars
Collision dynamics
Germanium
Heavy metals
Helium
Hot stars
Photosphere
Physics
Spectrum analysis
Subdwarf stars
Yttrium
Zirconium
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Zusammenfassung: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.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1412/14/142029