Tomasz Nowakowski is a member of the physics.org community.
Astronomers used the AstroSat to look at a cluster of stars. The results of the study were published on the arXiv pre-print repository.
The GCs are collections of stars. They are thought to be natural laboratories that can be used to study the evolution of stars and galaxies. It is thought that the origin of GCs is related to periods of intense star formation in early-type galaxies.
One of the most metal-poor GCs is located about 57,000 light years away. Almost 150 years after it was discovered, it was confirmed as a cluster. The cluster has a high latitude and has variable stars.
Astronomers from the Indian Institute of Space science and Technology in Thrissur, India, decided to use the UV Telescope to observe the stellar content of the cluster. The data from the satellite was included in the study.
The researchers wrote that they presented the photometric analysis of the cluster using the UVIT and N UV filters.
The team was able to create a catalog of ultraviolet stars of the same name. They were able to identify members of the group by analyzing the motion of the stars.
The study states that the population of blue horizontal branch stars is typical for metal poor GCs. Fourteen blue straggler star candidates and one extreme horizontal branch star were found by the astronomer. The researchers were able to identify the populations of BSSs and blue horizontal branch stars.
The SED of the BSS population seems to suggest that they have a collisional origin, according to the researchers. There is a possibility of collisional origin for BSSs in low density clusters.
The study found that NGC 5053 has a metallicity of -1.9 and its age was estimated to be about 12 billion years.
More information: K. J. Nikitha et al, Stellar populations of the globular cluster NGC 5053 investigated using AstroSat-Ultra Violet Imaging Telescope. arXiv:2205.13839v1 [astro-ph.GA], arxiv.org/abs/2205.13839There is a science network.
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