George Howitt

Antiglitches in accreting pulsars from superfluid vortex avalanches

G Howitt, A Melatos

Journal article  |  2022  |  Monthly Notices of the Royal Astronomical Society

Three sudden spin-down events, termed 'antiglitches', were recently discovered in the accreting pulsar NGC 300 ULX-1 by the Neutro..

An updated glitch rate law inferred from radio pulsars

M Millhouse, A Melatos, G Howitt, JB Carlin, L Dunn, G Ashton

Journal article  |  2022  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Radio pulsar glitches probe far-from-equilibrium processes involving stress accumulation and relaxation in neutron star interiors...

Rapid Stellar and Binary Population Synthesis with COMPAS

Jeff Riley, Poojan Agrawal, Jim W Barrett, Kristan NK Boyett, Floor S Broekgaarden, Debatri Chattopadhyay, Sebastian M Gaebel, Fabian Gittins, Ryosuke Hirai, George Howitt, Stephen Justham, Lokesh Khandelwal, Floris Kummer, Mike YM Lau, Ilya Mandel, Selma E de Mink, Coenraad Neijssel, Tim Riley, Lieke van Son, Simon Stevenson, et al.

Journal article  |  2022  |  ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

Compact Object Mergers: Population Astrophysics and Statistics (COMPAS; https://compas.science) is a public rapid binary populatio..

COMPAS: A rapid binary population synthesis suite

Team Compas, Jeff Riley, Poojan Agrawal, Jim Barrett, Kristian Boyett, Floor Broekgaarden, Debatri Chattopadhyay, Sebastian Gaebel, Fabian Gittins, Ryosuke Hirai, George Howitt, Stephen Justham, Lokesh Khandelwal, Floris Kummer, Mike Lau, Ilya Mandel, Selma de Mink, Coenraad Neijssel, Tim Riley, Lieke van Son, et al.

Journal article  |  2022  |  Journal of Open Source Software

Simulating pulsar glitches: an N-body solver for superfluid vortex motion in two dimensions

G Howitt, A Melatos, B Haskell

Journal article  |  2020  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

A rotating superfluid forms an array of quantized vortex lines that determine its angular velocity. The spasmodic evolution of the..

Luminous Red Novae: population models and future prospects

George Howitt, Simon Stevenson, Alejandro Vigna-Gomez, Stephen Justham, Natasha Ivanova, Tyrone E Woods, Coenraad J Neijssel, Ilya Mandel

Journal article  |  2020  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

A class of optical transients known as Luminous Red Novae (LRNe) have recently been associated with mass ejections from binary sta..

Neutron Star Extreme Matter Observatory: A kilohertz-band gravitational-wave detector in the global network

K Ackley, VB Adya, P Agrawal, P Altin, G Ashton, M Bailes, E Baltinas, A Barbuio, D Beniwal, C Blair, D Blair, GN Bolingbroke, V Bossilkov, S Shachar Boublil, DD Brown, BJ Burridge, J Calderon Bustillo, J Cameron, H Tuong Cao, JB Carlin, et al.

Journal article  |  2020  |  PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA

Gravitational waves from coalescing neutron stars encode information about nuclear matter at extreme densities, inaccessible by la..

Common envelope episodes that lead to double neutron star formation

Alejandro Vigna-Gomez, Morgan MacLeod, Coenraad J Neijssel, Floor S Broekgaarden, Stephen Justham, George Howitt, Selma E de Mink, Serena Vinciguerra, Ilya Mandel

Journal article  |  2020  |  PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA

Close double neutron stars (DNSs) have been observed as Galactic radio pulsars, while their mergers have been detected as gamma-ra..

Nonparametric Estimation of the Size and Waiting Time Distributions of Pulsar Glitches

G Howitt, A Melatos, A Delaigle

Journal article  |  2018  |  ASTROPHYSICAL JOURNAL

Glitch size and waiting time probability density functions (PDFs) are estimated for the five pulsars that have glitched the most u..

Size-waiting-time Correlations in Pulsar Glitches

A Melatos, G Howitt, W Fulgenzi

Journal article  |  2018  |  ASTROPHYSICAL JOURNAL

Few statistically compelling correlations are found in pulsar timing data between the size of a rotational glitch and the time to ..