ELFT HÍRADÓ

[vidakris AT konkoly.hu]

Szemináriumi meghívó / Invitation to a seminar
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CSFK CSI SZEMINÁRIUM / KONKOLY OBSERVATORY SEMINAR

Date: Nov 14 (Thursday) 14:00


Sándor Demes (HUN-REN ATOMKI, Debrecen; Hungary):
The role of molecular collisions in astronomy:towards non-LTE modelling of 
interstellar emission lines

Molecular clouds are active star-forming regions in the interstellar medium 
(ISM) and are therefore of particular interest for understanding the 
evolution of the early Universe. State-of-the-art ground-based and space 
telescopes are now providing brand new insights into the chemical composition 
and structure of matter in these clouds. However, detections in distant 
environments requires extensive support from both experimental and 
theoretical techniques. In interstellar clouds, local thermodynamic 
equilibrium conditions are usually not fulfilled (i.e. non-LTE conditions are 
present), so collisional and radiative processes compete to populate 
molecular levels. It is therefore important to explicitly take these 
processes into account for proper astrophysical modelling of the molecular 
emission lines detected from the ISM. The correct interpretation of the 
observations then allows to derive the abundance of the particular species, 
which also provides important details about the underlyi
 ng physico-chemical processes. In my talk, I will briefly summarise our 
recent results on various molecular collision problems and highlight their 
relevance for astronomy. In particular, I will focus on the importance of 
accurate state-to-state collisional rate coefficients for radiative transfer 
astrophysical models.

https://konkoly.hu/k-szeminariumok

The seminar will be held live in the Detre hall with audience, but also 
streamed online via Zoom. If you are unable to attend the presentation in 
person, you can join us via this link
https://us06web.zoom.us/j/82806911982?pwd=SVZpT0syQ1J6dHBvSkF4N2dXNEQ0dz09
or the meeting ID: 828 0691 1982 and passcode: 206265



Everyone is welcome!

Krisztián Vida, Ramon Brasser
organizers
https://konkoly.hu/k-szeminariumok