#  ITC Colloquium - Tom Millar (QUB) 

 



####  calendar\_today Date and Time 

 **October 31, 2019** 

 11:00AM - 12:00PM EDT 

####  pin\_drop Location 

 **Pratt**  



 

 



 

 Light in the Darkness: The Role of UV Photons in the Circumstellar Envelopes of AGB Stars

 Abstract: As well as forming silicates and carbonaceous dust grains, the circumstellar envelopes (CSEs) of AGB stars are host to nearly 100 molecular species. The traditional paradigm – that these result from the interaction of a spherically-symmetric expanding wind with interstellar photons – is under strain from recent observations that show ‘unexpected’ molecules in the hot, inner layers of the CSE. I will discuss some recent observations that indicate mass-loss outflows are clumpy and that CSEs may also be irradiated by internally-generated UV photons and will present the results of new models that take these two factors into account.



 

 



 

 See also:- [ 2019 - 20 ](/academic-year/2019-20)
- [ Colloquium ](/event-type/colloquium)
 
 

 Share on:- [     Facebook ](#)
- [     Twitter ](#)
- [     Linkedin ](#)
 


 Save: [ Add to calendar calendar\_today ](https://itc.cfa.harvard.edu/node/1202194/event-feed.ics)  Copy link link