LS IV — 14°116 : A Time-Resolved Spectroscopic Study
| dc.contributor | Armagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, UK. School of Physics, Trinity College Dublin, College Green, Dublin 2, Ireland | |
| dc.contributor.author | Martin, Pamela | |
| dc.contributor.author | Jeffery, C. Simon | |
| dc.date.accessioned | 2024-07-24T13:27:32Z | |
| dc.date.available | 2024-07-24T13:27:32Z | |
| dc.date.issued | 2017-12-01T00:00:00Z | |
| dc.identifier.doi | 10.1515/astro-2017-0448 | |
| dc.identifier.other | 10.1515/astro-2017-0448 | |
| dc.identifier.other | 2017OAst...26..240M | |
| dc.identifier.other | - | |
| dc.identifier.uri | http://hdl.handle.net/20.500.14302/2067 | |
| dc.description.abstract | LSIV-14 116 is a very unusual subdwarf B star. It pulsates non-radially with high-order g-modes, these pulsations are unexpected and unexplained, as the effective temperature is 6 000K hotter than the blue edge of the hot subdwarf g-mode instability strip. Its spectrum is enriched in helium which is not seen in either the V361 Hya (p-mode pulsators) or the V1093 Her stars (g-mode pulsators). Even more unusual is the 4 dex overabundance of zirconium, yttrium, and strontium. It is proposed that these over-abundances are a result of extreme chemical stratification driven by radiative levitation. We have over 20hrs of VLT/UVES spectroscopy from which we have obtained radial velocity curves for individual absorption lines. We are currently exploring ways in which to resolve the photospheric motion as a function of optical depth. | |
| dc.publisher | Open Astronomy | |
| dc.title | LS IV — 14°116 : A Time-Resolved Spectroscopic Study | |
| dc.type | article | |
| dc.source.journal | OAst | |
| dc.source.journal | OAst...26 | |
| dc.source.volume | 26 | |
| refterms.dateFOA | 2024-07-24T13:27:32Z | |
| dc.identifier.bibcode | 2017OAst...26..240M |
