ARC Centre of Excellence for Gravitational Wave Discovery

Narrowband Searches for Continuous Gravitational Waves from known Pulsars in the First Two Parts of the Fourth LIGO–Virgo–KAGRA Observing Run

AG Abac, I Abouelfettouh, F Acernese, K Ackley, A Adam, C Adamcewicz, S Adhicary, D Adhikari, N Adhikari, RX Adhikari, VK Adkins, S Afroz, A Agapito, D Agarwal, M Agathos, N Aggarwal, S Aggarwal, OD Aguiar, IL Ahrend, L Aiello

2026-07-10

Rotating nonaxisymmetric neutron stars (NSs) are promising sources for continuous gravitational waves (CWs). CWs may, if detected,..

Frequency- and phase-resolved polarimetry of millisecond pulsars and its application to timing

M Curyło, A Zic, S Wang, E Thrane, PD Lasky, JC Tremblay, ZC Chen, S Dai, VD Marco, G Hobbs, A Kapur, W Ling, ME Lower, RF Mandow, S Mishra, DJ Reardon, CJ Russell, RM Shannon, XJ Zhu

2026-07-01

Pulsar timing is used for a variety of applications including tests of fundamental physics, probing the structure of neutron stars..

Constraints on ultralight scalar and dark photon dark matter from PPTA DR3 and EPTA DR2

Xiao-Song Hu, Siyuan Chen, Kuo Liu, Xingjiang Zhu, Shi-Yi Zhao, Wu Jiang, John Antoniadis, ND Ramesh Bhat, Amodio Carleo, Shi Dai, Valentina Di Marco, Huanchen Hu, Wenhua Ling, Yang Liu, Saurav Mishra, Christopher J Russell, Ryan M Shannon, Clemente Smarra, Jingbo Wang, Lin Wang

2026-06-08

The cold dark matter model successfully describes the Universe on large scales, yet faces challenges at subgalactic scales. Ultral..

Relaxation of magnetically-confined mountains on accreting neutron stars through cross-field mass transport

R Brunet, A Melatos, PHB Rossetto

2026-05-01

Hydromagnetic instabilities modify the structure of a magnetically confined mountain on an accreting neutron star, once the accret..

Targeted Search for Eccentric Supermassive Binary Black Holes in OJ 287 and nearby Galaxy Clusters with PPTA DR3

SY Zhao, X Zhu, J Cardinal Tremblay, Y Chen, ML Cury lo, S Dai, V Di Marco, P Gitika, G Hobbs, SCC Ho, XS Hu, A Kapur, W Ling, RN Manchester, S Mishra, DJ Reardon, CJ Russell, RM Shannon, SM Tomson, J Wang

2026-05-01

We perform Bayesian targeted searches for continuous gravitational waves from eccentric supermassive binary black holes (SMBBHs) u..

Characterization of Type Ibn Supernovae

D Farias, C Gall, VA Villar, K Auchettl, KM de Soto, A Gagliano, WB Hoogendam, G Narayan, A Sedgewick, SK Yadavalli, Y Zenati, CR Angus, KW Davis, J Hjorth, WV Jacobson-Galán, DO Jones, CD Kilpatrick, MJ Bustamante Rosell, DA Coulter, G Dimitriadis

2026-04-01

<jats:p> <jats:italic>Context</jats:italic> . Type Ibn supernovae (SNe) are characterized ..

An extremely fast fading population II dwarf nova candidate: caught spectroscopically on the rise

N Van Bemmel, J Zhang, J Cooke, A Möller, AW Shafter, I Andreoni, K Auchettl, D Buckley, J Carney, D Dobie, J Freeburn, B Gendre, V Kansal, I Monageng, A Rau, N Rawat, M Suhr, EN Taylor

2026-03-01

In the first observational run of the Kilonova and Transients Programme (KNTraP), a rapidly evolving optical transient, KNTraP2022..

A Multimessenger Search for the Supermassive Black Hole Binary in 3C 66B with the Parkes Pulsar Timing Array

J Cardinal Tremblay, B Goncharov, R Van Haasteren, NDR Bhat, ZC Chen, V Di Marco, S Iguchi, A Kapur, W Ling, R Mandow, S Mishra, DJ Reardon, RM Shannon, H Sudou, J Wang, SY Zhao, XJ Zhu, A Zic

2026-02-20

A subparsec supermassive black hole binary (SMBHB) at the center of the galaxy 3C 66B is a promising candidate for continuous grav..

Searching for anisotropy in the gravitational wave background using the Parkes Pulsar Timing Array

Yiqin Chen, Shi-Yi Zhao, Zhi-Zhang Peng, Xingjiang Zhu, ND Ramesh Bhat, Zu-Cheng Chen, Małgorzata Curyło, Valentina Di Marco, George Hobbs, Agastya Kapur, Wenhua Ling, Rami Mandow, Saurav Mishra, Daniel J Reardon, Christopher J Russell, Ryan M Shannon, Jacob Cardinal Tremblay, Jingbo Wang, Lei Zhang, Andrew Zic

2026-02-19

In recent years, several Pulsar Timing Array collaborations have reported evidence for a nanohertz gravitational wave background (..

SN 2022acko and the Properties of Its Red Supergiant Progenitor: Direct Detection, Light Curves, and Nebular Spectroscopy

G Teixeira, CD Kilpatrick, CR Bom, A Santos, P Darc, K Auchettl, Á Álvarez-Candal, RJ Foley, PK Humire, AL Piro, C Rojas-Bravo, C Mendes de Oliveira, A Kanaan, T Ribeiro, W Schoenell

2026-02-10

<jats:title>Abstract</jats:title> <jats:p> We present ultraviolet, optical, and infrared obs..

Measuring the crust-superfluid coupling time-scale for 105 UTMOST pulsars with a Kalman filter

W Dong, A Melatos, NJ O'Neill, PM Meyers, DK Boek

2026-02-01

Crust-superfluid coupling plays an important role in neutron star rotation, particularly with respect to timing noise and glitches..

Pan-STARRS Follow-up of the Gravitational-wave Event S250818k and the Light Curve of SN2025ulz

JH Gillanders, ME Huber, M Nicholl, SJ Smartt, KW Smith, KC Chambers, DR Young, JW Tweddle, S Srivastav, MD Fulton, F Stoppa, GSH Paek, A Aamer, MR Alarcon, A Andersson, A Aryan, K Auchettl, TW Chen, T de Boer, AKH Kong

2025-12-10

Kilonovae are the scientifically rich—but observationally elusive—optical transient phenomena associated with compact binary merge..

A Panchromatic View of Late-time Shock Power in the Type II Supernova 2023ixf

WV Jacobson-Galán, L Dessart, CD Kilpatrick, PJ Patel, K Auchettl, S Tinyanont, R Margutti, VV Dwarkadas, KA Bostroem, R Chornock, RJ Foley, H Abunemeh, T Ahumada, P Arunachalam, MJ Bustamante-Rosell, DA Coulter, C Gall, H Gao, X Guo, DO Jones

2025-11-20

We present multiwavelength observations of the Type II supernova (SN II) 2023ixf during its first 2 yr of evolution. We combine gr..

Luminosity Distance Dispersion in Swiss-cheese Cosmology as a Function of the Hole Size Distribution

T Cheunchitra, A Melatos, RL Webster

2025-11-20

The luminosity distance–redshift (D <inf>L</inf>–z) relation derived from Type Ia supernovae (SNe Ia) yields evidence for a nonzer..

JWST Observations of SN 2023ixf. II. The Panchromatic Evolution between 250 and 720 Days after the Explosion

K Medler, C Ashall, P Hoeflich, E Baron, JM DerKacy, M Shahbandeh, T Mera, CM Pfeffer, WB Hoogendam, DO Jones, S Shiber, E Fereidouni, OD Fox, J Jencson, L Galbany, JT Hinkle, MA Tucker, BJ Shappee, ME Huber, K Auchettl

2025-11-10

We present the nebular phase spectroscopic and photometric observations of the nearby hydrogen-rich core-collapse supernova (CCSN)..

Dedicated-frequency analysis of gravitational-wave bursts from core-collapse supernovae with minimal assumptions

YSC Lee, MJ Szczepańczyk, T Mishra, M Millhouse, A Melatos

2025-10-30

Gravitational-wave (GW) emissions from core-collapse supernovae (CCSNe) provide insights into the internal processes leading up to..

Searching for Continuous Gravitational Waves in the Parkes Pulsar Timing Array Data Release 3

SY Zhao, ZC Chen, JC Tremblay, B Goncharov, XJ Zhu, NDR Bhat, M Curyło, S Dai, V Di Marco, H Ding, G Hobbs, A Kapur, W Ling, T Liu, R Mandow, S Mishra, DJ Reardon, CJ Russell, RM Shannon, S Wang

2025-10-20

We present results from an all-sky search for continuous gravitational waves from individual supermassive binary black holes using..

Ultra-wideband polarimetry of the April 2021 profile change event in PSR J1713 0747

RF Mandow, A Zic, JR Dawson, S Wang, M Curyło, S Dai, V Di Marco, G Hobbs, V Gupta, A Kapur, M Kerr, ME Lower, S Mishra, D Reardon, C Russell, RM Shannon, L Zhang, X Zhu

2025-10-08

The millisecond pulsar PSR J1713+0747 is a high-priority target for pulsar timing array experiments due to its long-term timing st..

How trust networks shape students’ opinions about the proficiency of artificially intelligent assistants

Y Bu, A Melatos, R Evans

2025-10-01

The rising use of educational tools controlled by artificial intelligence (AI) has provoked a debate about their proficiency. Whil..

Rapid construction of joint pulsar timing array data sets: The Lite method

B Larsen, CMF Mingarelli, PT Baker, JS Hazboun, S Chen, L Schult, SR Taylor, J Simon, J Antoniadis, J Baier, RN Caballero, A Chalumeau, Z Chen, I Cognard, D Deb, V Di Marco, T Dolch, IO Eya, EC Ferrara, KA Gersbach

2025-10-01

The International Pulsar Timing Array (IPTA)'s second data release (IPTA DR2) combines decades of observations of 65 millisecond p..

Choosing Suitable Noise Models for Nanohertz Gravitational-wave Astrophysics

V Di Marco, A Zic, RM Shannon, E Thrane, AD Kulkarni

2025-09-01

Accurately estimating the parameters of the nanohertz gravitational-wave background is essential for understanding its origin. The..

Discerning media bias within a network of political allies: An analytic condition for disruption by partisans

J Horstman, A Melatos, F Farokhi

2025-09-01

An individual's opinion concerning political bias in the media is shaped by exogenous factors (independent analysis of media outpu..

Evidence for an Instability-induced Binary Merger in the Double-peaked, Helium-rich Type IIn Supernova 2023zkd

A Gagliano, VA Villar, T Matsumoto, DO Jones, CL Ransome, AE Nugent, D Hiramatsu, K Auchettl, D Tsuna, Y Dong, S Gomez, PD Aleo, CR Angus, T de Boer, KA Bostroem, KC Chambers, DA Coulter, KW Davis, JR Fairlamb, J Farah

2025-08-20

We present ultraviolet to infrared observations of the extraordinary Type IIn supernova 2023zkd (SN 2023zkd). Photometrically, it ..

First results from the UTMOST-NS pulsar timing programme

L Dunn, C Flynn, M Bailes, YSC Lee, G Howitt, A Melatos, V Gupta, A Mandlik, A Deller

2025-08-01

The UTMOST-NS pulsar timing programme operated at the Molonglo Observatory Synthesis Telescope from 2021 April to 2023 June, obser..

The BTSbot-nearby Discovery of SN 2024jlf: Rapid, Autonomous Follow-up Probes Interaction in an 18.5 Mpc Type IIP Supernova

N Rehemtulla, WV Jacobson-Galán, A Singh, AA Miller, CD Kilpatrick, KR Hinds, C Liu, S Schulze, J Sollerman, T Jegou du Laz, T Ahumada, K Auchettl, SJ Brennan, MW Coughlin, C Fremling, A Gangopadhyay, DA Perley, NZ Prusinski, J Purdum, YJ Qin

2025-06-01

We present observations of the Type IIP supernova (SN) SN 2024jlf, including spectroscopy beginning just 0.7 days (∼17 hr) after f..

Search for continuous gravitational waves from neutron stars in five globular clusters with a phase-tracking hidden Markov model in the third LIGO observing run

L Dunn, A Melatos, P Clearwater, S Suvorova, L Sun, W Moran, RJ Evans

2025-04-15

A search is performed for continuous gravitational waves emitted by unknown neutron stars in five nearby globular clusters using d..

Multidetector characterization of gravitational-wave burst tensor polarizations with the BayesWave algorithm

YSC Lee, S Doshi, M Millhouse, A Melatos

2025-04-01

Einstein's theory of general relativity predicts that gravitational waves (GWs) are tensor-polarized, with two modes of polarizati..

Constraining inflation with nonminimal derivative coupling with the Parkes Pulsar Timing Array third data release

C Han, LY Chen, ZC Chen, C Fu, P Wu, H Yu, NDR Bhat, X Liu, V Di Marco, S Mishra, DJ Reardon, CJ Russell, RM Shannon, L Zhang, X Zhu, A Zic

2025-03-15

We study an inflation model with nonminimal derivative coupling that features a coupling between the derivative of the inflaton fi..

An optically led search for kilonovae to z∼0.3 with the Kilonova and Transients Programme (KNTraP)

N Van Bemmel, J Zhang, J Cooke, A Rest, A Möller, I Andreoni, K Auchettl, D Dobie, B Gendre, S Goode, J Freeburn, DO Jones, CD Kilpatrick, A Lien, A Rau, L Spitler, M Suhr, F Valdes

2025-03-01

Compact binary mergers detectable in gravitational waves can be accompanied by a kilonova, an electromagnetic transient powered by..

Searching for Gravitational-Wave Bursts from Cosmic String Cusps with the Parkes Pulsar Timing Array’s Third Data Release

Y Xia, J Wang, S Kuroyanagi, W Yan, Y Wen, A Kapur, J Zou, Y Feng, V Di Marco, S Mishra, CJ Russell, S Wang, D Zhao, X Zhu

2025-03-01

Pulsar timing arrays (PTAs) are designed to detect nanohertz-frequency gravitational waves (GWs). Since GWs are anticipated from c..

Gravitational waves from r-mode oscillations of stochastically accreting neutron stars

W Dong, A Melatos

2025-02-01

r-mode oscillations in rotating neutron stars are a source of continuous gravitational radiation. We investigate the excitation of..

GRB 220831A: a hostless, intermediate gamma-ray burst with an unusual optical afterglow

J Freeburn, B O’Connor, J Cooke, D Dobie, A Möller, N Tejos, J Zhang, P Beniamini, K Auchettl, J DeLaunay, S Dichiara, WF Fong, S Goode, A Gordon, CD Kilpatrick, A Lien, C Mihalenko, G Ryan, K Siellez, M Suhr

2025-02-01

GRB 220831A is a gamma-ray burst (GRB) with a duration and spectral peak energy that places it at the interface between the distri..

Transdimensional Inference for Gravitational-wave Astronomy with Bilby

Hui Tong, Nir Guttman, Teagan A Clarke, Paul D Lasky, Eric Thrane, Ethan Payne, Rowina Nathan, Ben Farr, Maya Fishbach, Gregory Ashton, Valentina Di Marco

2025-02-01

<jats:title>Abstract</jats:title> <jats:p>It has become increasingly useful to answer questions in gravitational-wa..

A two-minute burst of highly polarized radio emission originating from low Galactic latitude

D Dobie, A Zic, LS Oswald, J Pritchard, ME Lower, Z Wang, H Qiu, N Hurley-Walker, Y Wang, E Lenc, DL Kaplan, A Anumarlapudi, K Auchettl, M Bailes, AD Cameron, J Cooke, A Deller, LN Driessen, J Freeburn, T Murphy

2024-11-01

Several sources of repeating coherent bursts of radio emission with periods of many minutes have now been reported in the literatu..