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Diffraction-limited 76 mas speckle-masking interferometry of the carbon star IRC+10216 and related AGB objects with the SAO 6m telescope
G. Weigelt, T. Bloecker, K. -H. Hofmann +4
We present high-resolution J-, H-, and K-band observations of the carbon star IRC+10216. The images were reconstructed from 6m telescope speckle interferograms using the speckle ma…
Evolutionary Models of White Dwarfs with Helium Cores
T. Driebe, D. Schoenberner, T. Bloecker +1
We present seven evolutionary tracks for low-mass white dwarfs with helium cores, ranging in mass from 0.179 to 0.414 Msol. We generated the pre-white dwarf models from a 1 Msol se…
The role of convective boundaries
F. Herwig, T. Bloecker, D. Schoenberner
We investigate the influence of convective overshoot on stellar evolution models of the thermal pulse AGB phase with M_ZAMS = 3 Msol. An exponential diffusive overshoot algorithm i…
76 mas speckle-masking interferometry of IRC+10216 with the SAO 6m telescope: Evidence for a clumpy shell structure
G. Weigelt, Y. Balega, T. Bloecker +3
We present the first K'-band image of the carbon star IRC+10216 with 76 mas resolution. The diffraction-limited image was reconstructed from 6m telescope speckle data using the spe…