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UN Sustainable Development Goals

The group mainly performs high-resolution spectral analysis of astrophysical sources (e.g., stars) with different ages, chemical structures, and physical parameters (temperature, gravitational acceleration, and metal abundance) at different stages of their evolution. Some of the stars analysed were responsible for the chemical composition and chemical evolution of our galaxy.

The starlight is recorded using special optical systems with the help of special instruments called spectrometers and CCD detectors mounted on large telescopes. The stellar spectra obtained with CCD detectors are prepared for scientific analysis after the stages of analysis that require mathematical calculations and modelling. At this stage, the laws of optics are extensively used to qualify spectra as scientific data.

For the spectral atomic and molecular transitions detected in the spectra in the form of absorption or emission, we use the laws and basic principles of atomic and molecular physics. Atomic and molecular databases containing thousands of atomic and molecular transitions were used to identify measured lines. In this context, researchers specializing in stellar astrophysics/spectroscopy must have the theoretical and experimental knowledge of an atomic physicist. Spectroscopic analysis also requires basic knowledge of the quantum physics. In fact, the emergence of quantum physics was due to the ability to explain the absorption lines detected in the spectrum during the analysis of the solar spectrum. In other words, most physical sciences have their current position in astrophysical studies.

The atomic and molecular transitions measured and identified in the spectrum are subjected to some specific measurements to be converted into chemical abundances after a computationally intensive modelling process that requires the solution of the radiative transfer equation under predominantly local thermodynamic equilibrium conditions.

Each star analyzed opens a unique window into the galaxy in which it is located. The Sun, our source of heat and light, will undergo a similar chemical evolution process to other stars, and this process will have an impact that will change the dynamics of the solar system over a long period of time.

Stars are the source of many of the heavy elements in our bloodstream. It does not seem possible that the vast majority of heavy nuclei we encounter on Earth could have been formed on Earth. The Earth has not been able to reach temperatures that will enable the formation of these heavy nuclei at any stage of its evolution. When undergraduate and graduate fellows and young researchers working in our working group began to grasp the unifying role of astronomy and astrophysics within the basic sciences, their interest in this field and science increased.

Astronomy and astrophysics depict a process of discovery that shows how Physics and Mathematics can be effectively used together and in harmony, with the help of the possibilities they provide in the field of stellar spectroscopy.

Hey young researchers!...

If you want to participate in this process of discovery, we welcome you to the Department of Space Sciences and Technologies within the Faculty of Science.