Effective temperatures of 30 turnoff stars with -3.2 {[Fe/H]{ have been derived from the profiles of Balmer lines in high S/N, VLT/UVES spectra. While the...

Anomalous moments of the top quark arises from one loop corrections to the vertices ttg and ttγ. We study these anomalous couplings in different frameworks...

The Mg II chromospheric emissions in cool stars were analyzed using high resolution IUE archive spectra. The ways in which interstellar (IS) absorptions can...

Element abundance ratios hold important clues to understanding the evolution of stellar populations, through the varying timescales of different nucleosynthetic...

The dynamo model of solar magnetic field generation assumes that magnetic flux is retained at the dynamo site for times of the order of the solar-cycle period...

We study how the regolith properties affect the measured fluorescent soft X-ray spectra from atmosphereless planetary surfaces as a function of mean particle...

Beta Pictoris (BP) is a planetary system composed of an A-type star, two planets, and two debris disks. The short-term variability and the presence of...

The influence of the environment on the processes that regulate the history of star formation and the chemical enrichment in galaxies is a key ingredient for...

The Pristine survey uses narrow-band photometry on the region of the Ca II H & K absorption lines to find extremely metal-poor stars. With a spectroscopic...