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The Great Dimming of Betelgeuse: a Surface Mass Ejection (SME) and its Consequences
Andrea K. Dupree, Klaus G. Strassmeier, Thomas Calderwood +7
The bright supergiant, Betelgeuse (Alpha Orionis, HD 39801), underwent a historic optical dimming during 2020 January 27 February 13. Many imaging and spectroscopic observation…
Reflectivity of Venus' dayside disk during the 2020 observation campaign: outcomes and future perspectives
Yeon Joo Lee, Antonio García Muñoz, Atsushi Yamazaki +28
We performed a unique Venus observation campaign to measure the disk brightness of Venus over a broad range of wavelengths in August and September 2020. The primary goal of the cam…
The Rotation Period Distribution in the Young Open Cluster NGC 6709
E. M. Cole-Kodikara, S. A. Barnes, J. Weingrill +1
Open clusters serve as a useful tool for calibrating models of the relationship between mass, rotation, and age for stars with an outer convection zone due to the homogeneity of th…
Absolute dimensions and apsidal motion of the eclipsing binaries V889 Aql and V402 Lac
D. Baroch, A. Giménez, J. C. Morales +6
Double-lined eclipsing binaries allow the direct determination of masses and radii, which are key to test stellar models. With the launch of the TESS mission, many well-known eclip…