Chemically Peculiar Hot Subdwarfs
Lead Research Organisation:
Queen's University Belfast
Department Name: Sch of Mathematics and Physics
Abstract
Summary: Hot subdwarfs represent a rare but relatively-long-lived class of star, now clearly identified by GAIA as a distinct class in the Hertzsprung-Russell diagram. The majority have hydrogen-rich surfaces and can be accounted for as core-helium burning stars which lost most of their surface layers in a close binary-star interaction. About 10 - 20 per cent have helium rich surfaces, and must come from other evolution channels. We are carrying out a spectroscopic survey of these stars with SALT and also with LAMOST, and are discovering an extraordinary variety of exotic objects, including heavy-metal subdwarfs, runaway stars, extreme population II stars, and new extreme helium stars. The student will take over the day-to-day operation and reduction of the SALT survey data, and will learn techniques of spectral analysis to examine individual stars, in order to contribute to a more comprehensive picture of the late stages of stellar evolution.
Organisations
People |
ORCID iD |
Simon Jeffery (Primary Supervisor) | |
Edward Snowdon (Student) |
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
ST/R504609/1 | 01/10/2017 | 30/09/2021 | |||
2279889 | Studentship | ST/R504609/1 | 01/10/2019 | 01/04/2023 | Edward Snowdon |