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Detection of solar-like oscillations from Kepler photometry of the open cluster NGC 6819
Dennis Stello, Sarbani Basu, Hans Bruntt +49
Asteroseismology of stars in clusters has been a long-sought goal because the assumption of a common age, distance and initial chemical composition allows strong tests of the theor…
Mid-Infrared Extinction and its Variation with Galactic Longitude
Jian Gao, B. W. Jiang, A. Li
Based on the data obtained from the Spitzer/GLIPMSE Legacy Program and the 2MASS project, we derive the extinction in the four IRAC bands, [3.6], [4.5], [5.8] and [8.0] micron, rel…
On Magnesium Sulfide as the Carrier of the 30micron Emission Feature in Evolved Stars
Ke Zhang, Biwei Jiang, Aigen Li
A large number of carbon-rich evolved objects (asymptotic giant branch stars, protoplanetary nebulae, and planetary nebulae) in both the Milky Way galaxy and the Magellanic Clouds…
On the Carriers of the 21 Micron Emission Feature in Post-Asymptotic Giant Branch Stars
K. Zhang, B. W. Jiang, A. Li
The mysterious 21micron emission feature seen in sixteen C-rich proto-planetary nebulae (PPNe) remains unidentified since its discovery in 1989. Over a dozen of materials are sugge…