The First 8–13 Micron Spectra of Asymptotic Giant Branch Stars in the Magellanic Clouds

1995 ◽  
Vol 449 (2) ◽  
Author(s):  
M. A. T. Groenewegen ◽  
C. H. Smith ◽  
P. R. Wood ◽  
A. Omont ◽  
T. Fujiyoshi
Keyword(s):  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Giant Branch Stars

scholarly journals Obscured Asymptotic Giant Branch stars in the Magellanic Clouds

1999 ◽  
Vol 191 ◽  
pp. 567-572 ◽  
Author(s):  
Jacco Th. van Loon
Keyword(s):  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Agb Stars ◽  
Recent Advances ◽  
Giant Branch Stars

We report on some recent advances in the study and understanding of heavily obscured AGB stars in the Magellanic Clouds.

scholarly journals Rapid evolution of [WC] stars in the Magellanic Clouds

2020 ◽  
Vol 642 ◽  
pp. A71
Author(s):  
Marcin Hajduk
Keyword(s):  
South African ◽  
Rapid Evolution ◽  
Planetary Nebulae ◽  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Evolutionary Models ◽  
Heating Rates ◽  
Giant Branch Stars ◽  
Central Stars

We obtained new spectra of fourteen Magellanic Cloud planetary nebulae with the South African Large Telescope to determine heating rates of their central stars and to verify evolutionary models of post-asymptotic giant branch stars. We compared new spectra with observations made in previous years. Five planetary nebulae showed an increase in excitation over time. Four of their central stars exhibit [WC] features in their spectra, including three new detections. This raises the total number of [WC] central stars of PNe in the Magellanic Clouds to ten. We compared determined heating rates of the four [WC] central stars with the He-burning post-asymptotic giant branch evolutionary tracks and the remaining star with the H-burning tracks. Determined heating rates are consistent with the evolutionary models for both H and He-burning post-asymptotic giant branch stars. The central stars of the PNe that show the fastest increase of excitation are also the most luminous in the sample. This indicates that [WC] central stars in the Magellanic Clouds evolve faster than H-burning central stars, and they originate from more massive progenitors.

scholarly journals Mass-Losing AGB Stars in the Magellanic Clouds

1993 ◽  
Vol 155 ◽  
pp. 319-319
Author(s):  
Neill Reid
Keyword(s):  
Mass Loss ◽  
Stellar Evolution ◽  
Planetary Nebula ◽  
Luminosity Function ◽  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Agb Stars ◽  
The Future ◽  
Giant Branch Stars

Asymptotic giant branch stars are the immediate precursors to the planetary nebula stage of stellar evolution. It is clear that the latter stages of a stars life on the AGB are accompanied by either continuous or episodic mass-loss, with the final convulsion being the ejection of the envelope (the future planetary shell), the gradual exposure of the bare CO core and the rapid horizontal evolution to the blue in the H-R diagram. Thus, the structure of the planetary nebula luminosity function, particularly at the higher luminosities (although this phase is extremely rapid), is intimately tied to the luminosity function of the AGB.

scholarly journals Rb-RICH ASYMPTOTIC GIANT BRANCH STARS IN THE MAGELLANIC CLOUDS

2009 ◽  
Vol 705 (1) ◽  
pp. L31-L35 ◽  
Author(s):  
D. A. García-Hernández ◽  
A. Manchado ◽  
D. L. Lambert ◽  
B. Plez ◽  
P. García-Lario ◽  
...  
Keyword(s):  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Giant Branch Stars

scholarly journals Thermally-pulsing asymptotic giant branch stars in the Magellanic Clouds

2008 ◽  
Vol 4 (S256) ◽  
pp. 385-390
Author(s):  
Paola Marigo ◽  
Léo Girardi ◽  
Alessandro Bressan ◽  
Martin A. T. Groenewegen ◽  
Bernhard Aringer ◽  
...  
Keyword(s):  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Circumstellar Dust ◽  
Stellar Winds ◽  
Asymptotic Giant Branch Stars ◽  
Stellar Clusters ◽  
Agb Stars ◽  
Wide Range ◽  
Giant Branch Stars ◽  
Theoretical Project

AbstractWe present the latest results of a theoretical project aimed at investigating the properties of thermally-pulsing asymptotic giant branch (TP-AGB) stars in different host systems. For this purpose, we have recently calculated calibrated synthetic TP-AGB tracks — covering a wide range of metallicities (0.0001 ≤ Z ≤ 0.03) up to the complete ejection of the envelope by stellar winds (Marigo & Girardi 2007) — and used them to generate new sets of stellar isochrones (Marigo et al. 2008). The latter are converted to about 25 different photometric systems, including the mid-infrared filters of Spitzer and AKARI as the effect of circumstellar dust from AGB stars is taken into account. First comparisons with AGB data in the MC field and stellar clusters are discussed.

scholarly journals Dust production rate of asymptotic giant branch stars in the Magellanic Clouds

2014 ◽  
Vol 442 (2) ◽  
pp. 1440-1450 ◽  
Author(s):  
Raffaella Schneider ◽  
Rosa Valiante ◽  
Paolo Ventura ◽  
Flavia dell'Agli ◽  
Marcella Di Criscienzo ◽  
...  
Keyword(s):  
Production Rate ◽  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Dust Production ◽  
Giant Branch Stars

scholarly journals IDENTIFICATION OF A CLASS OF LOW-MASS ASYMPTOTIC GIANT BRANCH STARS STRUGGLING TO BECOME CARBON STARS IN THE MAGELLANIC CLOUDS

2015 ◽  
Vol 810 (2) ◽  
pp. 116 ◽  
Author(s):  
Martha L. Boyer ◽  
Iain McDonald ◽  
Sundar Srinivasan ◽  
Albert Zijlstra ◽  
Jacco Th. van Loon ◽  
...  
Keyword(s):  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Carbon Stars ◽  
Low Mass ◽  
Giant Branch Stars
Sign in / Sign up

Export Citation Format

Share Document