69 citations · 250 across the 9 of their papers we have counts for
8 papers
The proper motion of HV2112: A TŻO candidate in the SMC
C. Clare Worley, Mike. J. Irwin, Christopher A. Tout +3
The candidate Thorne-Żytkow object (TŻO), HV2112, is becoming a well-studied if enigmatic object. A key point of its candidacy as a TŻO is whether or not it resides in the Small Ma…
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…
Discovery of a Thorne-Zytkow object candidate in the Small Magellanic Cloud
Emily M. Levesque, Philip Massey, Anna N. Zytkow +1
Thorne-Zytkow objects (TZOs) are a theoretical class of star in which a compact neutron star is surrounded by a large, diffuse envelope. Supergiant TZOs are predicted to be almost…
Quasi-stars, giants and the Schönberg-Chandrasekhar limit
Warrick H. Ball, Christopher A. Tout, Anna N. Żytkow
The Schönberg-Chandrasekhar (SC) limit is a well-established result in the understanding of stellar evolution. It provides an estimate of the point at which an evolved isothermal c…
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…
An Approach to the Cosmological Constant Problem(s)
G. L. Kane, M. J. Perry, A. N. Zytkow
We propose an approach to explaining why naive large quantum fluctuations are not the right estimate for the cosmological constant. We argue that the universe is in a superposition…
A Possible Mechanism for Generating a Small Positive Cosmological Constant
G. L. Kane, M. J. Perry, A. N. Zytkow
We argue that in the context of string theory a large number N of connected degenerate vacua that mix will lead to a ground state with much lower energy, essentially because of the…
The Beginning of the End of the Anthropic Principle
Gordon L. Kane, Malcolm J. Perry, Anna N. Zytkow
We argue that if string theory as an approach to the fundamental laws of physics is correct, then there is almost no room for anthropic arguments in cosmology. The quark and lepton…