Τμήμα Φυσικής
ΣΧΟΛΗ ΘΕΤΙΚΩΝ ΕΠΙΣΤΗΜΩΝ ΕΚΠΑ
ΤΜΗΜΑ ΦΥΣΙΚΗΣ
ΤΟΜΕΑΣ ΑΣΤΡΟΦΥΣΙΚΗΣ ΑΣΤΡΟΝΟΜΙΑΣ ΚΑΙ ΜΗΧΑΝΙΚΗΣ
Σ Ε Μ Ι Ν Α Ρ Ι Ο
Τετάρτη 20 Νοεμβρίου 2019, 13:00-14:00
Αίθουσα Διαλέξεων Τομέα Αστροφυσικής, Αστρονομίας και Μηχανικής
Photodissociation and cosmic-ray dominated regions from local infrared dark clouds to distant star-forming galaxies
Dr. Thomas Bisbas
Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens
In this talk, I will discuss the basics of photodissociation and cosmic-ray dominated regions, which are key components for understanding the dynamical and thermal state of the interstellar medium (ISM). The chemistry of the ISM is different across the epochs thus leading to various adjustments needed in our observational methods. We will see three different ISM cases: i) that of a local infrared dark cloud leading to star-formation, ii) that of local galaxies and iii) that of high-redshift galaxies at the peak of star-formation of the Universe. In every particular case, I will emphasize on the carbon cycle and how it relates to the atomic-to-molecular transition, crucial for our understanding of the star-formation activity.