Observations

Mar 17, 2017

Fundamental Properties of Peculiar Hot Subdwarfs

2016-2-SCI-008

Stars approaching the end of their lives expand and, in many cases, exchange material with close companions. This has a radical effect on their evolutionand surface composition, producing a zoo of rare but highly exotic stars. By exploring the propertiesof thes pathological cases, we are endeavouring to understand the ways in which stars exhange matter and evolve towardstheir final fate as white dwarfs or supernovae. The stars in this programme are perfect examples — many of them have completelylost their surface hydogen, for reasons still to be explained. These observations will tell us about the abundances of otherelements — previously we have discovered huge overabundances of exotic species such as lead and zirconium.

Systematic radial velocity monitoring of likely intermediate period post-AGB binaries

2016-2-SCI-034

We are looking for double stars in planetary nebulae.

SALT Observations of Planck Clusters

2016-2-SCI-023

Confirmation and redshift determination of possible galaxy clusters.

Mar 16, 2017

HRS characterisation of K2 blue supergiants

2016-2-SCI-018

We are observing the chemical make up of very large, hot stars with the aim of deciphering their evolutionary paths.

Finding New Black Holes in Binaries – a Link to LIGO

2016-2-SCI-056

This proposal seeks to find black holes in binary systems that will eventually lead to mergers producing gravity waves.

Seaching for Old Novae VIIIa

2016-2-SCI-057

We are interested in the long-term behavior of erupting systems known as classical novae. They are often closely monitored during their eruptions and then mostly ignored after the eruption is over. We are using SALT to observe old novae and measure their current brightness, so we can see how it has changed over the years and decades, and compare it to theoretical models. In this proposal, we take advantage of SALT’s large size, which gives us the ability to look at very faint objects and measure their current brightness level.

Seaching for Old Novae VIIIb

2016-2-SCI-058

We are interested in the long-term behavior of erupting systems known as classical novae. They are often closely monitored during their eruptions and then mostly ignored after the eruption is over. We are using SALT to observe old novae and measure their current brightness, so we can see how it has changed over the years and decades, and compare it to theoretical models. In this proposal, we take advantage of SALT’s large size, which gives us the ability to look at very faint objects and measure their current brightness level.

Systematic radial velocity monitoring of likely intermediate period post-AGB binaries

2016-2-SCI-034

We are looking for double stars in planetary nebulae.

Analysis of metallicity gradient and local chemical composition heterogeneity in the Galactic disk

2016-1-MLT-002

Analysis of metallicity gradient and local chemical composition heterogeneity in the Galactic disk based on the distant unexplored Southern Cepheids

Mar 15, 2017

Finding New Black Holes in Binaries – a Link to LIGO

2016-2-SCI-056

This proposal seeks to find black holes in binary systems that will eventually lead to mergers producing gravity waves.