Scientists from the University of Manchester, together with their international colleagues, have created a survey of a nearby galaxy.
Dr. Tana Joseph was part of the team that made the survey of the nearby Small Magellanic Cloud (SMC), which is a dwarf galaxy. This research was published in the journal Monthly Notices of the Royal Astronomical Society, and dr. Joseph is the first author.
The research found two potential new supernova remnants. We are talking about the cloud of gas and dust, which were left behind after a star exploded. They also found radio signals from more than 20 planetary nebulae, which were already studied from optical observations.
The authors of the paper said that this was an exciting time for studying nearby galaxies. These galaxies come with an ideal laboratory, since they are really close, which means that they can be resolved and located at known distances.
The observations happened as a part of the Evolutionary Map of the Universe project, and by using CSIRO’s new ASKAP (Australian Square Kilometre Array Pathfinder) radio telescope.
Talking about the findings of the survey, dr. Joseph stated that they could combine radio data together with the observations from optical, gamma-ray, X-ray, and infrared telescopes, which allows them to find out more about the SMC and about the other galaxies in more details.
The observations from SMC took place at two different radio frequencies – 960 MHz and 1320 MHz – with a sensitivity that’s more than four times than the previous survey of the galaxy. ASKAP found more than 7000 radio sources coming from SMC, many of them are background galaxies coming through the SMC.
This project found 70 million galaxies in 5 years. Researchers found 2.5 million galaxies in 40 years. CSIRO, Australia’s national science agency, build and managed ASKAP.