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Ionized carbon around IRC +10216
William T. Reach, Maxime Ruaud, Helmut Wiesemeyer +5
Asymptotic giant branch (AGB)stars create a rich inventory of molecules in their envelopes as they lose mass during later stages of their evolution. These molecules cannot survive…
An Exceptional Dimming Event for a Massive, Cool Supergiant in M51
Jacob E. Jencson, David J. Sand, Jennifer E. Andrews +6
We present the discovery of an exceptional dimming event in a cool supergiant star in the Local Volume spiral M51. The star, dubbed M51-DS1, was found as part of a Hubble Space Tel…
The impact of realistic red supergiant mass-loss on stellar evolution
Emma R. Beasor, Ben Davies, Nathan Smith
Accurate mass-loss rates are essential for meaningful stellar evolutionary models. For massive single stars with initial masses between 8 - 30\msun the implementation of cool super…
Circumstellar Medium Constraints on the Environment of Two Nearby Type Ia Supernovae: SN 2017cbv and SN 2020nlb
D. J. Sand, S. K. Sarbadhicary, C. Pellegrino +23
We present deep Chandra X-ray observations of two nearby Type Ia supernovae, SN 2017cbv and SN 2020nlb, which reveal no X-ray emission down to a luminosity 5.3$\time…
Enormous explosion energy of Type IIP SN 2017gmr with bipolar Ni-56 ejecta
V. P. Utrobin, N. N. Chugai, J. E. Andrews +7
The unusual Type IIP SN 2017gmr is revisited in order to pinpoint the origin of its anomalous features, including the peculiar light curve after about 100 days. The hydrodynamic mo…
The Age of Westerlund 1 Revisited
Emma R. Beasor, Ben Davies, Nathan Smith +2
The cluster Westerlund~1 (Wd1) is host to a large variety of post main-sequence (MS) massive stars. The simultaneous presence of these stars can only be explained by stellar models…