Observations

Sep 24, 2018

Detailled study of CEMP stars identified in the RAVE survey

2017-1-MLT-012

We are observing around 120 stars that are among the oldest in our Galaxy. Determining their chemical composition will allow us to understand what happened during the first billion years of the Universe

Monitoring the line emission in Southern Galactic Be/X-ray binaries

2017-1-MLT-004

Lines arising from the disc of material around Be/X-ray binaries are highly variable on multiple timescales. The variability seen is intimately linked to the mass transfer and resulting X-ray emission seen in such systems, though the details of this link are still not well understood. We are monitoring these lines with SALT/RSS to see how they change during periods of differing X-ray activity and at different points around their orbits.

Sep 23, 2018

Characterising the host star and protoplanetary disk environment in nearby young star systems

2018-1-SCI-016

The young star β Pictoris is seen orbited by a warped edge-on debris disc of gas and dust, as well as a massive planet. In order to gain insights into the mechanisms of planetary system formation, it is useful to study the properties, behaviour and interaction of exocomets within this and other similar young planetary systems.

Observational Constraints on the Nature of Extreme Luminous Blue Variables S18 and S134

2017-1-MLT-006

S18 and S134 are massive, hot, highly variable star in the Magellanic Clouds. Despite its size, S18 shows large variations in brightness over timescales of days/weeks quite unlike any other star of its type. We are trying to look at how the spectrum of the star changes with overall brightness to try to understand the nature of this intriguing source. S134 appears to be very similar to S18 and so we’re investigating this source as well.

Monitoring the line emission in Southern Galactic Be/X-ray binaries

2017-1-MLT-004

Lines arising from the disc of material around Be/X-ray binaries are highly variable on multiple timescales. The variability seen is intimately linked to the mass transfer and resulting X-ray emission seen in such systems, though the details of this link are still not well understood. We are monitoring these lines with SALT/RSS to see how they change during periods of differing X-ray activity and at different points around their orbits.

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

2017-1-MLT-010

We are searching for binary stars in some of the most beautiful stellar remnants in the Galaxy.

Detailled study of CEMP stars identified in the RAVE survey

2017-1-MLT-012

We are observing around 120 stars that are among the oldest in our Galaxy. Determining their chemical composition will allow us to understand what happened during the first billion years of the Universe

Reverberation mapping of low luminosity active galactic nuclei

2018-1-SCI-037

Probing the inner structure of AGN through reverberation mapping technique.

Asymmetry is Destiny: Wolf-Rayet Binary Stars as GRB Progenitors

2018-1-SCI-008

This program aims to use the recently-commissioned high-precision spectropolarimetry mode of RSS to probe the prodigious mass-loss from certain massive evolved stars known as Wolf-Rayet stars which are in binary systems. These objects are possible progenitors of Gamma-Ray Bursts, which are the most energetic explosions yet known, and can be seen across the entire known universe.

Sep 22, 2018

Characterising the host star and protoplanetary disk environment in nearby young star systems

2018-1-SCI-015

The young star β Pictoris is seen orbited by a warped edge-on debris disc of gas and dust, as well as a massive planet. In order to gain insights into the mechanisms of planetary system formation, it is useful to study the properties, behaviour and interaction of exocomets within this and other similar young planetary system.