Massive stars have strong stellar winds that direct their evolution through the upper
Hertzsprung–Russell diagram and determine the black hole mass function. Furthermore …

Our understanding of massive star evolution is in flux due to recent upheavals in our view of
mass loss and observations of a high binary fraction among O-type stars. Mass-loss rates for …

The final evolution of stars in the mass range 70–140${\text {}}{M} _ {\odot} $ is explored.
Depending upon their mass loss history and rotation rates, these stars will end their lives as …

We present panchromatic observations and modeling of supernova (SN) 2020tlf, the first
normal Type II-P/L SN with confirmed precursor emission, as detected by the Young …

Over the last 15 years, the supernova community has endeavoured to directly identify
progenitor stars for core-collapse supernovae discovered in nearby galaxies. These …

With the advent of new wide-field, high-cadence optical transient surveys, our understanding
of the diversity of core-collapse supernovae has grown tremendously in the last decade …

We present the densely sampled early light curve of the Type II supernova (SN) 2023ixf, first
observed within hours of explosion in the nearby Pinwheel Galaxy (Messier 101; 6.7 Mpc) …

We present observations of SN 2021csp, the second example of a newly identified type of
supernova (SN) hallmarked by strong, narrow, P Cygni carbon features at early times (Type …

Interaction-powered supernovae (SNe) explode within an optically thick circumstellar
medium (CSM) that could be ejected during eruptive events. To identify and characterize …

Early observations of supernovae (SNe) indicate that enhanced mass-loss and pre-SN
outbursts may occur in progenitors of many types of SNe. We investigate the role of energy …