Observations

Jan 17, 2019

Spectroscopic observations of central stars of mid-infrared nebulae discovered w ith Spitzer and WISE

2018-1-MLT-008

Spectroscopic observations of central stars of mid-infrared nebulae discovered with Spitzer and WISE

Jan 16, 2019

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

2018-2-MLT-005

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.

SALT Spectroscopy of Gaia Hypervelocity Stars

2018-2-SCI-027

Following fast-moving stars found by Gaia. @_sublunar_ @kenjshen

Magellanic Cloud Nova Shells

2018-2-SCI-014

When novae erupt, the white dwarf in a close binary system ejects about an Earth-mass of hydrogen gas at speeds of a few thousand km/sec. About half of those ejected shells are seen decades later as glowing, expanding blobs of gas, but half are not. We’re surveying the Magellanoc Clouds to determine why some shells become visible, while others don’t.

Jan 15, 2019

Characterising high-frequency pulsating A-type stars found with SuperWASP

2018-2-SCI-017

Observations of hot of variable stars to determine their fundament properties through spectroscopy.

The Lithium Abundance of the Large Magellanic Cloud

2018-2-SCI-006

The creation of the first chemical elements, which took place just minutes after the Big Bang, provides an intimate view of the physical laws that governed our Universe during its first moments. At present, the Standard Model of cosmology and particle physics is unable to fully explain the relative abundance of these primordial elements. In particular, there is a significant disagreement between the measured and predicted abundance of lithium. We propose to conduct a novel survey that will provide a new, reliable measure of the lithium abundance of gas clouds in a nearby galaxy.

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.

SALT Supernova Followup

2018-1-MLT-006

Observations of supernovae, near and far. @_sublunar_

Spectroscopic observations of central stars of mid-infrared nebulae discovered w ith Spitzer and WISE

2018-1-MLT-008

Spectroscopic observations of central stars of mid-infrared nebulae discovered with Spitzer and WISE

Probing the optical counterparts of high energy sources

2018-1-MLT-014

Studying the most energetic objects in the Universe using optical observation with SALT.