Calendar
Speaker: Paolo Giacobbe (INAF)
Titolo: “Retrieving the Atmospheres of Distant Worlds: Insights from High-Resolution Spectroscopy”
Abstract: “High-resolution (HR) transmission spectroscopy has demonstrated exceptional effectiveness in detecting multiple molecular species in the atmospheres of exoplanets. At HR, molecular absorption bands are resolved into thousands of individual spectral lines, allowing for unambiguous identification of species through line matching (e.g., via cross-correlation) with planetary model templates, even when most individual lines are buried within photon noise. The next frontier is to connect the detection of molecular species to the underlying chemical and physical properties of exoplanetary atmospheres. We discuss the prospects of this technique in the context of upcoming facilities, such as the Extremely Large Telescope (ELT), highlighting its potential to revolutionize our understanding of exoplanet atmospheres.”
Con Seminario Astrokids in aula
Speaker Maria R. Carotenuto (INAF)
Titolo: Conservazione preventiva delle collezioni del Museo: primi risultati del progetto SpecoLab
Abstract:
Speaker: Mattia Claudio D’Arpa (UNIPA/INAF)
Titolo: INVESTIGATING EXOPLANETARY ATMOSPHERES THROUGH TRANSMISSION SPECTROSCOPY
Abstract:
Titolo: Modeling the interaction of a Supernova Remnant with the Circumstellar Medium – The case of the gamma-ray bright galactic supernova remnant RX J1713.7-3946
Abstract: SNRs are strongly characterized by their interaction with the circumstellar medium (CSM), often shaped by the mass loss history of the progenitor star, and with the ambient interstellar medium (ISM).
The aim of the thesis is to explore the physics of the interaction of a SNR with the CSM by examining a specific SNR through hydrodynamic (HD) numerical simulations. In particular, I focus on the remarkable Galactic SNR RX J1713.7-3946.
I will expose the results of hydrodynamics simulations regarding the formation of the CSM, the expansion of the SNR through the CSM and finally the interaction of the SNR with a molecular cloud. I will show the results of the synthesis of X-ray thermal emission from the outcome of those simulations.
Finally, I compare the X-ray thermal emission with actual X-ray observations of RX J1713. In particular, I show that the zero age main sequence mass of the progenitor of RX J1713 is of the order of 15 solar masses. Moreover, I derive that the explosion energy of the parent supernova is of the order of 1 FOE, while a highly energetic explosion (≥ 2 FOE) can be excluded. Finally, I obtain a tight constraint on the age of the remnant, which is of ∼ 2150 yr.