Publications

2024

1. Multi-Point Hermite Methods for the N-Body Problem Alexander J. Dittmann Submitted [Preprint]
2. A Semi-Analytical Model for Stellar Evolution in AGN Disks Alexander J. Dittmann, Matteo Cantiello Submitted [Preprint]
3. Mapping the Outcomes of Stellar Evolution in the Disks of Active Galactic Nuclei Gaia Fabj, et al. Submitted [Preprint]
4. Exploring Waveform Variations among Neutron Star Ray-Tracing Codes for Complex Emission Geometries Devarshi Choudhury, et al. The Astrophysical Journal 2024 [Journal] [Preprint]
5. The Effects of Cooling on Boundary Layer Accretion Alexander J. Dittmann The Astrophysical Journal 2024 [Journal] [Preprint]
6. Notes on the Practical Application of Nested Sampling: MultiNest, (Non)convergence, and Rectification Alexander J. Dittmann The Open Journal of Astrophysics 2024 [Journal] [Preprint]
7. A More Precise Measurement of the Radius of PSR J0740+6620 Using Updated NICER Data Alexander J. Dittmann, M. Coleman Miller, Frederick K. Lamb, et al. Accepted [Journal] [Preprint]
8. The Santa Barabara Binary-Disk Code Comparison Paul C. Duffell, Alexander J. Dittmann, Daniel J. D'Orazio, et al. The Astrophysical Journal 2024 [Journal] [Preprint]
9. Runaway Eccentricity Growth: A Pathway for Binary Black Hole Mergers in AGN Disks Josh Calcino, Adam M. Dempsey, Alexander J. Dittmann, Hui Li The Astrophysical Journal 2024 [Journal] [Preprint]
10. The Evolution of Accreting Binaries: From Brown Dwarfs to Supermassive Black Holes Alexander J. Dittmann, Geoffrey Ryan The Astrophysical Journal 2024 [Journal] [Preprint]
11. The Evolution of Inclined Binary Black Holes in the Disks of Active Galactic Nuclei Alexander J. Dittmann, Adam M. Dempsey, Hui Li The Astrophysical Journal 2024 [Journal] [Preprint]

2023

1. The Decoupling of Binaries from Their Circumbinary Disks Alexander J. Dittmann, Geoffrey Ryan, M. Coleman Miller The Astrophysical Journal Letters 2023 [Journal] [Preprint]
2. A Sensitive Search for Supernova Emission Associated with the Extremely Energetic and Nearby GRB 221009A Gokul P. Srinivasaragavan, et al., The Astrophysical Journal Letters 2023 [Journal] [Preprint]
3. The Influence of Disk Composition on the Evolution of Stars in the Disks of Active Galactic Nuclei Alexander J. Dittmann, Adam S. Jermyn, and Matteo Cantiello, The Astrophysical Journal 2023 [Journal] [Preprint]

2022

1. The Radius of PSR J0740+6620 from NICER with NICER background estimates Tuomo Salmi, et al. The Astrophysical Journal 2022 [Journal] [Preprint]
2. Effects of an Immortal Stellar Population in AGN Disks Adam S. Jermyn, et al. The Astrophysical Journal 2022 [Journal] [Preprint]
3. A Survey of Disc Thickness and Viscosity in Circumbinary Accretion: Binary Evolution, Variability, and Disc Morphology Alexander J. Dittmann, Geoffrey Ryan Monthly Notices of the Royal Astronomical Society 2022 [Journal] [Preprint]
4. An Analytical, Fully Relativistic Framework for Tidal Disruption Event Streams in Schwarzschild Geometry Alexander J. Dittmann Monthly Notices of the Royal Astronomical Society 2022 [Journal] [Preprint]

2021

1. On the Terminal Spins of Accreting Stars and Planets: Boundary Layers Alexander J. Dittmann Monthly Notices of the Royal Astronomical Society 2021 [Journal] [Preprint]
2. The Radius of PSR J0740+6620 from NICER and XMM-Newton Data Miller, Lamb, Dittmann, et al. The Astrophysical Journal Letters 2021 [Journal] [Preprint]
3. NICER Detection of Thermal X-ray Pulsations from the Massive Millisecond Pulsars PSR J0740+6620 and PSR J1614-2230 M. Wolff, et al. The Astrophysical Journal Letters 2021 [Journal] [Preprint]
4. Constraining the Neutron Star Mass--Radius Relation and Dense Matter Equation of State with NICER. III. Model Description and Verification of Parameter Estimation Codes S. Bogdanov, et al. The Astrophysical Journal Letters 2021 [Journal] [Preprint]
5. Stellar Evolution in the Disks of Active Galactic Nuclei Produces Rapidly Rotating Massive Stars Adam S. Jermyn, Alexander J. Dittmann, Matteo Cantiello, Rosalba Perna The Astrophysical Journal 2021 [Journal] [Preprint]
6. Accretion onto Stars in the Disks of Active Galactic Nuclei Alexander J. Dittmann, Matteo Cantiello, Adam S. Jermyn, The Astrophysical Journal 2021 [Journal] [Preprint]
7. Preventing Anomalous Torques in Circumbinary Accretion Simulations Alexander J. Dittmann, Geoffrey Ryan, The Astrophysical Journal 2021 [Journal] [Preprint]
8. High-order multiderivative IMEX schemes Alexander J. Dittmann, Applied Numerical Mathematics 2021 [Journal] [Preprint]

2020

1. Modified Hermite Integrators of Arbitrary Order Alexander J. Dittmann, Monthly Notices of the Royal Astronomical Society 2020 [Journal] [Preprint]
2. Star formation in accretion discs and SMBH growth Alexander J. Dittmann, M. Coleman Miller, Monthly Notices of the Royal Astronomical Society 2020 [Journal] [Preprint]

2019

1. Constraining the Neutron Star Mass-Radius Relation and Dense Matter Equation of State with NICER. II. Emission from Hot Spots on a Rapidly Rotating Neutron Star S. Bogdanov, et al., The Astrophysical Journal Letters 2019 [Journal] [Preprint]
2. PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter Miller, Lamb, and Dittmann, et al., The Astrophysical Journal Letters 2019 [Journal] [Preprint]

2018

1. A Candidate Tidal Disruption Event in a Quasar at z=2.359 from Abundance Ratio Variability Liu, X., Dittmann, A. J., Shen, Y., Jiang, L., The Astrophysical Journal 2018 [Journal] [Preprint]
2. Separated Kaon Electroproduction Cross Section and the Kaon Form Factor from 6 GeV JLab Data Carmignotto, M. et al., Physical Review C 2018 [Journal] [Preprint]

2017

1. The Aerogel Cerenkov detector for the SHMS magnetic spectrometer in Hall C at Jefferson Lab Horn, T. et al. Nuclear Instruments and Methods in Physics Research Section A 2017 [Journal] [Preprint]

2015

1. PSR J1930-1852: a Pulsar in the Widest Known Orbit around Another Neutron Star Swiggum, J. K. et al., The Astrophysical Journal 2015 [Journal] [Preprint]