Dust properties in the circumstellar shells of evolved stars: Observational constraints from ISO and Spitzer infrared spectroscopy

Proceedings of the International Astronomical Union

Proceedings of the International Astronomical Union (2008), 4 : pp 217-218
Copyright © International Astronomical Union 2008
DOI: 10.1017/S1743921308021601 (About DOI)
Published online: 03 October 2008

Table of Contents - 2008 - Volume 4, Symposium S251 (Organic Matter in Space)

Contributed Papers

Dust properties in the circumstellar shells of evolved stars: Observational constraints from ISO and Spitzer infrared spectroscopy

Article author query
garcía-lario p [ADS] [Google Scholar]
calderón jvp [ADS] [Google Scholar]
garcía-hernández da [ADS] [Google Scholar]
stanghellini l [ADS] [Google Scholar]
engels d [ADS] [Google Scholar]
manchado a [ADS] [Google Scholar]
davies je [ADS] [Google Scholar]
villaver e [ADS] [Google Scholar]
shaw ra [ADS] [Google Scholar]
bobrowsky m [ADS] [Google Scholar]

P. García-Lario^a1, J. V. Perea Calderón^a2, D. A. García-Hernández^a3, L. Stanghellini^a4, D. Engels^a5, A. Manchado^a3, J. E. Davies^a4, E. Villaver^a6, R. A. Shaw^a4 and M. Bobrowsky^a7

^a1Herschel Science Centre, European Space Astronomy Centre, ESA, Madrid, Spain email: Pedro.Garcia-Lario@sciops.esa.int

^a2European Space Astronomy Centre, ESA, Madrid, Spain

^a3Instituto de Astrofísica de Canarias, Tenerife, Spain

^a4NOAO, Tucson, AZ, USA

^a5Hamburger Sternwarte, Germany

^a6Space Telescope Science Institute, Baltimore, MD, USA

^a7Computer Science Corporation / Space Telescope Science Institute, Baltimore, MD, USA

Abstract

We present the results of a systematic analysis of the solid state features identified in the circumstellar environments of a large sample of evolved stars with ISO/SWS and Spitzer/IRS spectroscopy. The sample includes several hundred stars with a wide variety of progenitor masses evolving from the early AGB phase to the PN stage. Our observations are used to propose an evolutionary scheme in which the results obtained can be interpreted as a consequence of the nucleosynthesis processes that take place in this short phase of the stellar evolution, in particular the third dredge-up and hot bottom burning, which in turn are also strongly modulated by the stellar metallicity.

Keywords

Circumstellar matter;
stars: AGB and post-AGB;
planetary nebulae

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<div style="background: #FFFFFF; margin: 0 10px 10px 0; padding: 0 10px 0 0; text-align: left; font-family: Arial, Helvetica, sans-serif; line-height: 1em;"><div style="font-size: 11px; padding: 0px 0px 10px 0px; font-weight:bold; color: #045989;">Dust properties in the circumstellar shells of evolved stars: Observational constraints from ISO and Spitzer infrared spectroscopy</div><div style="font-size: 11px;"><b>				
					 
					
						 
					
				P. García-Lario,				
					 
					
						 
					
				J. V. Perea Calderón,				
					 
					
						 
					
				D. A. García-Hernández,				
					 
					
						 
					
				L. Stanghellini,				
					 
					
						 
					
				D. Engels,				
					 
					
						 
					
				A. Manchado,				
					 
					
						 
					
				J. E. Davies,				
					 
					
						 
					
				E. Villaver,				
					 
					
						 
					
				R. A. Shaw				
					 
					
						 
					
				 and M. Bobrowsky (2008).</b><br />
<a href="http://journals.cambridge.org/action/displayJournal?jid=IAU">Proceedings of the International Astronomical Union</a>, <a href="http://journals.cambridge.org/action/displayJournal?jid=IAU&volumeId=4&bVolume=y#loc4>

">Volume 4</a>, 
<a href="http://journals.cambridge.org/action/displayIssue?jid=IAU&volumeId=4&issueId=S251&seriesId=0"> Symposium S251</a>, February 2008 pp 217-218 <br/>
<a href="http://journals.cambridge.org/action/displayAbstract?aid=2373068">http://journals.cambridge.org/action/displayAbstract?aid=2373068</a></div></div>

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Dust properties in the circumstellar shells of evolved stars: Observational constraints from ISO and Spitzer infrared spectroscopy

P. García-Lario, J. V. Perea Calderón, D. A. García-Hernández, L. Stanghellini, D. Engels, A. Manchado, J. E. Davies, E. Villaver, R. A. Shaw and M. Bobrowsky (2008)
Proceedings of the International Astronomical Union, , Volume 4, Symposium S251 , February 2008 pp 217-218
http://journals.cambridge.org/abstract_S1743921308021601

P. García-Lario, J. V. Perea Calderón, D. A. García-Hernández, L. Stanghellini, D. Engels, A. Manchado, J. E. Davies, E. Villaver, R. A. Shaw and M. Bobrowsky (2008). Dust properties in the circumstellar shells of evolved stars: Observational constraints from ISO and Spitzer infrared spectroscopy. Proceedings of the International Astronomical Union, 4 , pp 217-218 doi:10.1017/S1743921308021601

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Proceedings of the International Astronomical Union

Contributed Papers

Dust properties in the circumstellar shells of evolved stars: Observational constraints from ISO and Spitzer infrared spectroscopy

P. García-Larioa1, J. V. Perea Calderóna2, D. A. García-Hernándeza3, L. Stanghellinia4, D. Engelsa5, A. Manchadoa3, J. E. Daviesa4, E. Villavera6, R. A. Shawa4 and M. Bobrowskya7

P. García-Lario^a1, J. V. Perea Calderón^a2, D. A. García-Hernández^a3, L. Stanghellini^a4, D. Engels^a5, A. Manchado^a3, J. E. Davies^a4, E. Villaver^a6, R. A. Shaw^a4 and M. Bobrowsky^a7