Publications (6)
The spin rates of O stars in WR + O binaries. I. Motivation, methodology and first results from SALT
Michael M. Shara, Steven M. Crawford, Dany Vanbeveren +3
The black holes (BH) in merging BH-BH binaries are likely progeny of binary O stars. Their properties, including their spins, will be strongly influenced by the evolution of their…
A high-mass Planetary Nebula in a Galactic Open Cluster
Vasiliki Fragkou, Quentin Parker, Albert Zijlstra +2
Planetary Nebulae are the ionised ejected envelopes surrounding the remnant cores of dying stars. Theory predicts that main-sequence stars with one to about eight times the mass of…
Polarized QPOs from the INTEGRAL polar IGRJ14536-5522 (=Swift J1453.4-5524)
Stephen B. Potter, David A. H. Buckley, Darragh O'Donoghue +10
We report optical spectroscopy and high speed photometry and polarimetry of the INTEGRAL source IGRJ14536-5522 (=Swift J1453.4-5524). The photometry, polarimetry and spectroscopy a…
Chemical abundances and doppler imaging of the Ap Si/He-wk star HD 100357
Athul Dileep, Santosh Joshi, Sofya Alexeeva +11
We present the results of time-resolved photometry, abundance analysis and Doppler imaging of an Ap star, HD 100357. The {\it TESS} photometry revealed rotational modulation with a…
Giants Transiting Giants I: A Non-inflated Hot Jupiter Orbiting a Massive Subgiant
Nicholas Saunders, Samuel K. Grunblatt, Daniel Huber +27
While the population of confirmed exoplanets continues to grow, the sample of confirmed transiting planets around evolved stars is still limited. We present the discovery and confi…
The spin rates of O stars in WR + O Magellanic Cloud binaries
Michael M. Shara, Steven M. Crawford, Dany Vanbeveren +3
Some massive, merging black holes (BH) may be descendants of binary O stars. The evolution and mass transfer between these O stars determines the spins of their progeny BH. These w…