Wild, J. orcid.org/0000-0002-9967-590X and Jeffery, C.S. (2017) HST spectroscopy of chemically peculiar hot subdwarfs: PG 0909+276 and UVO0512–08. Open Astronomy, 26 (1). pp. 246-251. ISSN 2543-6376
Abstract
High-resolution ultraviolet spectroscopy of two chemically peculiar hot subdwarfs, PG 0909+276 and UVO0512-08, has been obtained using the Hubble Space Telescope. Chemical abundances in the stars’ atmospheres were measured from previous optical spectra and from the new ultraviolet observations. Iron-group metals, including cobalt, copper and zinc, are highly enriched relative to typical subdwarf B (sdB) stars. Lead is also enriched, but with an abundance similar to other sdB stars. The surface chemistry of these two stars is quite distinct from both hydrogen-rich normal sdB stars and also from the intermediate helium-rich sdB stars which show heavy-element superabundances. A full explanation for exotic chemistries in hot subdwarfs remains elusive.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 J. Wild and C. S. Jeffery, published by De Gruyter Open. This work is licensed under the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 License. (https://creativecommons.org/licenses/by-nc-nd/4.0/) |
Keywords: | stars: abundances; stars: fundamental parameter; stars: chemically peculiar; stars: individual( PG 0909+276); stars: individual ( UVO 0512–08); stars: subdwarfs |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 20 Jan 2022 11:40 |
Last Modified: | 20 Jan 2022 11:40 |
Status: | Published |
Publisher: | Walter de Gruyter GmbH |
Refereed: | Yes |
Identification Number: | 10.1515/astro-2017-0451 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:182767 |