Heavy metal spectroscopy in extremely metal rich subdwarfs

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

doi:10.1088/1742-6596/1412/14/142029

Heavy metal spectroscopy in extremely metal rich subdwarfs

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

School of Mathematics and Physics

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Abstract

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 language	English
Pages (from-to)	142029
Journal	Journal of Physics: Conference Series
Volume	1412
Issue number	14
DOIs	https://doi.org/10.1088/1742-6596/1412/14/142029
Publication status	Published - 01 Jan 2020

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10.1088/1742-6596/1412/14/142029Licence: CC BY

Heavy metal spectroscopy in extremely metal rich subdwarfs
Copyright 2020 the authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Final published version, 628 KBLicence: CC BY

Cite this

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T1 - Heavy metal spectroscopy in extremely metal rich subdwarfs

AU - Fernández-Menchero, L

AU - Ballance, C P

AU - Ramsbottom, C A

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N2 - 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.

AB - 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.

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JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

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Heavy metal spectroscopy in extremely metal rich subdwarfs

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