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An Analytic, Fully Relativistic Framework for Tidal Disruption Event Streams in Schwarzschild Geometry
Alexander J. Dittmann
We present an analytic and fully relativistic framework for studying the self-intersection of tidal disruption event (TDE) streams, restricting ourselves to the Schwarzschild space…
The Radius of PSR J0740+6620 from NICER and XMM-Newton Data
M. C. Miller, F. K. Lamb, A. J. Dittmann +25
PSR J07406620 has a gravitational mass of , which is the highest reliably determined mass of any neutron star. As a result, a measurement of its radius wil…
NICER Detection of Thermal X-ray Pulsations from the Massive Millisecond Pulsars PSR J0740+6620 and PSR J1614-2230
M. T. Wolff, S. Guillot, S. Bogdanov +11
We report the detection of X-ray pulsations from the rotation-powered millisecond-period pulsars PSR J0740+6620 and PSR J1614-2230, two of the most massive neutron stars known, usi…
Constraining the Neutron Star Mass--Radius Relation and Dense Matter Equation of State with NICER. III. Model Description and Verification of Parameter Estimation Codes
Slavko Bogdanov, Alexander J. Dittmann, Wynn C. G. Ho +16
We describe the X-ray pulse profile models we use, and how we use them, to analyze Neutron Star Interior Composition Explorer (NICER) observations of rotation-powered millisecond p…
Stellar Evolution in the Disks of Active Galactic Nuclei Produces Rapidly Rotating Massive Stars
Adam S. Jermyn, Alexander J. Dittmann, Matteo Cantiello +1
Stars can either be formed in or captured by the accretion disks in Active Galactic Nuclei (AGN). These AGN stars are irradiated and subject to extreme levels of accretion, which c…
Preventing Anomalous Torques in Circumbinary Accretion Simulations
Alexander Dittmann, Geoffrey Ryan
Numerical experiments are the primary method of studying the evolution of circumbinary disks due to the strong nonlinearities involved. Many circumbinary simulations also require t…