scholarly journals Very Large Telescope Spectra of Carbon Stars in the Large Magellanic Cloud and Their Metallicity Dependence

2002 ◽  
Vol 580 (2) ◽  
pp. L133-L136 ◽  
Author(s):  
M. Matsuura ◽  
Albert A. Zijlstra ◽  
J. Th. van Loon ◽  
I. Yamamura ◽  
A. J. Markwick ◽  
...  
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Large Telescope ◽  
Carbon Stars ◽  
Very Large Telescope

scholarly journals Resolving the dusty torus and the mystery surrounding LMC red supergiant WOH G64

2008 ◽  
Vol 4 (S256) ◽  
pp. 454-458
Author(s):  
Keiichi Ohnaka ◽  
Thomas Driebe ◽  
Karl-Heinz Hofmann ◽  
Gerd Weigelt ◽  
Markus Wittkowski
Keyword(s):  
Radiative Transfer ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Large Telescope ◽  
Previous Estimate ◽  
Long Baseline ◽  
Very Large Telescope ◽  
Radiative Transfer Modeling ◽  
Stellar Source ◽  
Dusty Torus

AbstractWe present mid-IR long-baseline interferometric observations of the red supergiant WOH G64 in the Large Magellanic Cloud with MIDI at the ESO's Very Large Telescope Interferometer (VLTI). Our MIDI observations of WOH G64 are the first VLTI observations to spatially resolve an individual stellar source in an extragalactic system. Our 2-D radiative transfer modeling reveals the presence of a geometrically and optically thick torus seen nearly pole-on. This model brings WOH G64 in much better agreement with the current evolutionary tracks for a 25 M⊙ star — about a half of the previous estimate of 40 M⊙ — and solves the serious discrepancy between theory and observation which existed for this object.

scholarly journals Very Large Telescope three micron spectra of dust-enshrouded red giants in the Large Magellanic Cloud

2006 ◽  
Vol 447 (3) ◽  
pp. 971-989 ◽  
Author(s):  
J. Th. van Loon ◽  
J. R. Marshall ◽  
M. Cohen ◽  
M. Matsuura ◽  
P. R. Wood ◽  
...  
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Red Giants ◽  
Large Telescope ◽  
Very Large Telescope

Three luminous carbon stars in the Large Magellanic Cloud

1978 ◽  
Vol 219 ◽  
pp. 452 ◽  
Author(s):  
H. B. Richer ◽  
B. E. Westerlund ◽  
N. Olander
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Carbon Stars

Merrill-Sanford bands in Large Magellanic Cloud carbon stars

2004 ◽  
Vol 355 (4) ◽  
pp. 1196-1206 ◽  
Author(s):  
D. H. Morgan ◽  
D. Hatzidimitriou ◽  
R. D. Cannon
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Carbon Stars

scholarly journals Lithium in Large Magellanic Cloud carbon stars

2003 ◽  
Vol 341 (4) ◽  
pp. 1290-1298 ◽  
Author(s):  
D. Hatzidimitriou ◽  
D. H. Morgan ◽  
R. D. Cannon ◽  
B. F. W. Croke
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Carbon Stars

scholarly journals Understanding the evolution and dust formation of carbon stars in the Large Magellanic Cloud via the JWST

2021 ◽  
Author(s):  
E. Marini ◽  
F. Dell'Agli ◽  
M. A. T. Groenewegen ◽  
D. A. García-Hernández ◽  
L. Mattsson ◽  
...  
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Dust Formation ◽  
Carbon Stars

The Velocity Structure of Large Magellanic Cloud Carbon Stars: Young Disk, Old Disk, and Perhaps a Separate Population

2000 ◽  
Vol 540 (1) ◽  
pp. 211-216 ◽  
Author(s):  
David S. Graff ◽  
Andrew P. Gould ◽  
Nicholas B. Suntzeff ◽  
Robert A. Schommer ◽  
Eduardo Hardy
Keyword(s):  
Velocity Structure ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Carbon Stars ◽  
Separate Population

The MAGIC project – II. Discovery of two new Galactic lithium-rich Cepheids

2019 ◽  
Vol 488 (3) ◽  
pp. 3211-3221
Author(s):  
V Kovtyukh ◽  
B Lemasle ◽  
A Kniazev ◽  
L Berdnikov ◽  
G Bono ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Mixed Mode ◽  
Milky Way ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Large Telescope ◽  
Instability Strip ◽  
Red Giant ◽  
First Time

Abstract We report the discovery of two new lithium-rich Cepheids in the Milky Way (A(Li) ≈ 2.9 dex) among the targets of the MAGIC spectroscopic survey with the Southern African Large Telescope spectrographs. The 6707 Å Li feature is usually not detectable in the atmosphere of Cepheids. Only three Cepheids (two in the Milky Way and one in the Large Magellanic Cloud) had been reported so far with high lithium abundances. We examine the possibility that the Li-rich Cepheids are evolving towards the red giant branch, crossing the instability strip for the first time, as well as other possible scenarios. The two stars are mixed-mode Cepheids pulsating simultaneously in the first and in the second overtone modes. We briefly discuss the possible connection between their unusual chemical composition and their pulsational properties.

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