scholarly journals THE MASS-LOSS RETURN FROM EVOLVED STARS TO THE LARGE MAGELLANIC CLOUD. II. DUST PROPERTIES FOR OXYGEN-RICH ASYMPTOTIC GIANT BRANCH STARS

2010 ◽  
Vol 716 (1) ◽  
pp. 878-890 ◽  
Author(s):  
Benjamin A. Sargent ◽  
S. Srinivasan ◽  
M. Meixner ◽  
F. Kemper ◽  
A. G. G. M. Tielens ◽  
...  
Keyword(s):  
Mass Loss ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Evolved Stars ◽  
Giant Branch Stars

Infrared Studies of the Variability and Mass Loss of Some of the Dustiest Asymptotic Giant Branch Stars in the Magellanic Clouds

2018 ◽  
Vol 14 (S343) ◽  
pp. 498-499
Author(s):  
B. Sargent ◽  
S. Srinivasan ◽  
M. Boyer ◽  
M. Feast ◽  
P. Whitelock ◽  
...  
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Agb Stars ◽  
Infrared Studies ◽  
Infrared Wavelengths ◽  
Optical Wavelengths ◽  
Giant Branch Stars

AbstractThe asymptotic giant branch (AGB) stars with the reddest colors have the largest amounts of circumstellar dust. AGB stars vary in their brightness, and studies show that the reddest AGB stars tend to have longer periods than other AGB stars and are more likely to be fundamental mode pulsators than other AGB stars. Such stars are difficult to study, as they are often not detected at optical wavelengths. Therefore, they must be observed at infrared wavelengths. Using the Spitzer Space Telescope, we have observed a sample of very dusty AGB stars in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) over Cycles 9 through 12 during the Warm Spitzer mission. For each cycle’s program, we typically observed a set of AGB stars at both 3.6 and 4.5 μm wavelength approximately monthly for most of a year. We present results from our analysis of the data from these programs.

scholarly journals Studying Asymptotic Giant Branch Stars in the JWST Era

Universe ◽  
2020 ◽  
Vol 6 (12) ◽  
pp. 223
Author(s):  
Paolo Ventura ◽  
Ester Marini ◽  
Silvia Tosi ◽  
Flavia Dell’Agli
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Asymptotic Giant Branch ◽  
Dust Formation ◽  
Asymptotic Giant Branch Stars ◽  
Agb Stars ◽  
Space Telescope ◽  
James Webb Space Telescope ◽  
Giant Branch Stars

We explore the potential offered by the incoming launch of the James Webb Space Telescope, to study the stars evolving through the asymptotic giant branch (AGB) phase. To this aim we compare data of AGB stars in the Large Magellanic Cloud, taken with the IRS spectrograph, with the results from modelling of AGB evolution and dust formation in the wind. We find that the best diagrams to study M- and C-stars are, respectively, ([F770W]−[F2500W], [F770W]) and ([F770W]−[F1800W], [F1800W]). ([F770W]−[F2500W], [F770W]) turns out to be the best way of studying the AGB population in its entirely.

scholarly journals Asymptotic giant branch stars in the Large Magellanic Cloud: evolution of dust in circumstellar envelopes

2015 ◽  
Vol 447 (4) ◽  
pp. 2992-3015 ◽  
Author(s):  
F. Dell'Agli ◽  
P. Ventura ◽  
R. Schneider ◽  
M. Di Criscienzo ◽  
D. A. García-Hernández ◽  
...  
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Circumstellar Envelopes ◽  
Cloud Evolution ◽  
Giant Branch Stars

scholarly journals The Large Magellanic Cloud as a laboratory for hot bottom burning in massive asymptotic giant branch stars

2015 ◽  
Vol 450 (3) ◽  
pp. 3181-3190 ◽  
Author(s):  
P. Ventura ◽  
A. I. Karakas ◽  
F. Dell'Agli ◽  
M. L. Boyer ◽  
D. A. García-Hernández ◽  
...  
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Giant Branch Stars
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