Abstract: Star clusters are one of the most useful places in the universe for studies of stellar and galaxy evolution. Formed when stars collapse from the same molecular cloud into a cluster, star clusters offer a unique way to study stars of a homogeneous age and chemical composition across a range of masses. In the […]

In-person seminar Abstract: The All-weather MUse Supernova Integral field Nearby Galaxies (AMUSING) survey is a successful programme that has observed more than 700 host galaxies of transient events (mostly supernovae - SNe) using the Multi Unit Spectroscopic Explorer (MUSE) instrument at the Very Large Telescope (VLT). In this talk, I will present the main goals, […]

Abstract: The Nancy Grace Roman Space Telescope, the next NASA flagship mission set to launch by May 2027, will revolutionize our understanding of the cosmos.  With a field of view 100 times greater than the Hubble Space Telescope at comparable resolution, Roman will perform an unprecedented high-latitude survey to map the distribution of dark matter […]

Abstract Magnesium isotope ratios provide a powerful probe of the origin of chemical anomalies in globular clusters. Although globular clusters were once thought to contain stars of a single chemical composition, we now know that many host multiple stellar populations with distinct abundance patterns. These variations point to high-temperature nuclear processing in an earlier generation […]

Abstract: The detailed chemical compositions of planet-hosting stars provide vital clues on the formation and composition of exoplanetary systems. A recent analysis by Pavlenko et al. (2019) suggests that planet-hosting stars tend to have larger C/O abundance ratios than stars without confirmed planets at given metallicity. This signature was solidified in Amarsi et al. (2019) […]

The demand for a large telescope dedicated to spectroscopic surveys is an interest shared worldwide and figures explicitly in many national strategic science plans. The Wide Field Spectroscopic Telescope (WST) is a community lead initiative to fill this crucial gap in astronomical capability and will work in synergy with future ground and space-based facilities.  WST […]

With the full-scale operations of the Vera C. Rubin Observatory and the Nancy Grace Roman Space Telescope now underway, astronomy has entered a golden age of time-domain discovery. As we move away from finding just a few rare transients, the International Gemini Observatory serves as the essential bridge between discovery and characterization. This talk explores […]

In-person seminar Active Galactic Nuclei (AGN) play a central role in regulating galaxy evolution, yet the interplay between black hole accretion, star formation, and large-scale environment remains not well constrained. Using integral-field spectroscopy from the MaNGA survey, we find that nearby AGN host galaxies exhibit nuclear star formation rates 2–4 times higher than matched inactive […]

Modern sky surveys are now discovering comets at distances beyond 5 to 10 au from the Sun, a distance that is expected to increase with the upcoming Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST). However, the mechanisms driving comet activity at such distances remain poorly understood, as temperatures are too low […]

Abstract: The inference of the physical properties of galaxies at cosmological distance requires modeling a wide range of physics, including e.g. stellar evolution and atmospheres; dust attenuation and re-emission; nebular physics;  AGN emission; and more. Bayesian inference is often used to map the inevitable degeneracies, and the large amount of physics and wide parameter space […]