The SALT survey of chemically-peculiar hot subdwarfs
C. Simon Jeffery,
Armagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, United Kingdom. Corresponding author: simon.jeffery@armagh.ac.uk
Itumeleng Monageng,
Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa and South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa
Brent Miszalski,
Australian Astronomical Optics, Faculty of Science and Engineering, Macquarie University, North Ryde, NSW 2113, Australia
Edward J. Snowdon,
Armagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, United Kingdom
Laura J.A. Scott,
Armagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, United Kingdom
Vincent M. Woolf,
Physics Department, University of Nebraska at Omaha, 6001 Dodge St, Omaha, NE, 68182, USA
Matti Dorsh,
Dr. Karl Remeis-Observatory & ECAP, Friedrich-Alexander University Erlangen-Nürnberg, Sternwartstr. 7, 96049 Bamberg, Germany and Institut für Physik und Astronomie, Universität Potsdam, Haus 28, Karl-Liebknecht-Str. 24/25, 14476 Potsdam-Golm, Germany
Abstract
The Southern African Large Telescope (SALT) has surveyed a sample of 300 chemically-peculiar hot subdwarfs with a view to explore evolutionary pathways and connections between a large variety of stars. Observations have been obtained for the entire sample at intermediate resolution to provide classifications and atmosphere parameters, and a smaller sample at high resolution to permit detailed chemical abundance analyses. The first has provided a substantial sample of extremely helium-rich sdO stars, but has also led to significant discoveries of hot white dwarfs, pre-white dwarfs, heavy-metal subdwarfs and extreme helium stars. This paper provides an overview of the current status of the project.
Keywords : surveys, stars: subdwarfs, stars: chemically-peculiar, stars: atmospheres, stars: evolution
Pour citer cet article
C. Simon Jeffery, Itumeleng Monageng, Brent Miszalski, Edward J. Snowdon, Laura J.A. Scott, Vincent M. Woolf & Matti Dorsh, «The SALT survey of chemically-peculiar hot subdwarfs», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 92 - Année 2023, Numéro 2 - Proceedings of the 10th Meeting on Hot Subdwarfs and Related Objects, 29-38 URL : https://popups.uliege.be/0037-9565/index.php?id=11209.