Radiative Transfer Modeling of The Dust Around LMC AGB Stars From The SAGE Survey

Details Radiative Transfer Modeling of The Dust Around LMC AGB Stars From The SAGE Survey Radiative Transfer Modeling of The Dust Around LMC AGB Stars From The SAGE Survey

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21334101s&link_type=abstract

American Astronomical Society, AAS Meeting #213, #341.01; Bulletin of the American Astronomical Society, Vol. 41, p.475

Astronomy and Astrophysics

Astronomy

Scientific paper

I will present results from our empirical and radiative transfer modeling studies of the circumstellar dust shells around LMC AGB stars. About 40,000 AGB star candidates were identified using photometry from the SAGE survey, and their MIR excesses were estimated by comparing them to model photospheres in order to probe the excess as a proxy for mass-loss rates and to reveal general trends of derived parameters such as color temperature and optical depth. In the radiative transfer study, I am developing a grid of dust-shell models to obtain mass-loss rates for our entire sample of stars. The AGB is the penultimate stage in the life of all low- and intermediate-mass stars, and AGB stars produce copious amounts of gas and dust which is returned to the ISM in the form of low-velocity winds. The mass-loss phenomenon is well-studied, but its dependence on various factors such as metallicity is uncertain. This work will quantify the injection rate of material into the ISM from AGB stars, advance our understanding of AGB mass-loss, and it will help create an improved description of AGB stars in the modeling of stellar populations and the chemical evolution of galaxies.
The SAGE Project is supported by NASA/Spitzer grant 1275598 and NASA NAG5-12595.

Affiliated with

Also associated with

No associations

Rating

Radiative Transfer Modeling of The Dust Around LMC AGB Stars From The SAGE Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Radiative Transfer Modeling of The Dust Around LMC AGB Stars From The SAGE Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiative Transfer Modeling of The Dust Around LMC AGB Stars From The SAGE Survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1699501