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Hubble as a Unique Discovery Engine of the Fate of Massive Stars and Black Hole Formation
Avishai Gilkis, Eva Laplace, Charles D. Kilpatrick +3
How stellar-mass black holes are formed is an open question in astrophysics, with very limited observational constraints. It is not known which types of stars are more likely to pr…
An optimal envelope ejection efficiency for merging neutron stars
Alexander M. Tanaka, Avishai Gilkis, Robert G. Izzard +1
We use the rapid binary stellar evolution code BINARY_C to estimate the rate of merging neutron stars with numerous combinations of envelope ejection efficiency and natal kick disp…
Highly magnetized white dwarfs: implications and current status
B. Mukhopadhyay, M. Bhattacharya, A. J. Hackett +3
Over the last decade or so, we have been developing the possible existence of highly magnetized white dwarfs with analytical stellar structure models. While the primary aim was to…
Resolving dichotomy in compact objects through continuous gravitational waves observation
Surajit Kalita, Tushar Mondal, Christopher A. Tout +2
More than two dozen soft gamma-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs) have been detected so far. These are isolated compact objects. Many of them are either found…
HV2112, a Thorne-Zytkow Object or a Super Asymptotic Giant Branch Star
Christopher A. Tout, Anna N. Zytkow, Ross P. Church +1
The very bright red star HV2112 in the Small Magellanic Cloud could be a massive Thorne-Zytkow Object, a supergiant-like star with a degenerate neutron core. With its luminosity of…
Interacting compact binaries: modeling mass transfer in eccentric systems
Ross P. Church, Melvyn B. Davies, Alexey Bobrick +1
We discuss mass transfer in eccentric binaries containing a white dwarf and a neutron star (WD--NS binaries). We show that such binaries are produced from field binaries following…
The structure and evolution of quasi-stars
Warrick H. Ball, Christopher A. Tout, Anna N. Zytkow +1
The existence of bright quasars at high redshifts implies that supermassive black holes were able to form in the early Universe. Though a number of mechanisms to achieve this have…
Supernova Kicks and Misaligned Microquasars
Rebecca G. Martin, Christopher A. Tout, J. E. Pringle
The low-mass X-ray binary microquasar GRO J1655-40 is observed to have a misalignment between the jets and the binary orbital plane. Since the current black hole spin axis is likel…
The Shape of an Accretion Disc in a Misaligned Black Hole Binary
Rebecca G. Martin, J. E. Pringle, Christopher A. Tout
We model the overall shape of an accretion disc in a semi-detached binary system in which mass is transfered on to a spinning black hole the spin axis of which is misaligned with t…