Hannah Middleton

The Parkes pulsar timing array second data release: Timing analysis

DJ Reardon, RM Shannon, AD Cameron, B Goncharov, GB Hobbs, H Middleton, M Shamohammadi, N Thyagarajan, M Bailes, NDR Bhat, S Dai, M Kerr, RN Manchester, CJ Russell, R Spiewak, JB Wang, XJ Zhu

Journal article  |  2021  |  Monthly Notices of the Royal Astronomical Society

The main goal of pulsar timing array experiments is to detect correlated signals such as nanohertz-frequency gravitational waves. ..

On the Evidence for a Common-spectrum Process in the Search for the Nanohertz Gravitational-wave Background with the Parkes Pulsar Timing Array

Boris Goncharov, RM Shannon, DJ Reardon, G Hobbs, A Zic, M Bailes, M Curylo, S Dai, M Kerr, ME Lower, RN Manchester, R Mandow, H Middleton, MT Miles, A Parthasarathy, E Thrane, N Thyagarajan, X Xue, X-J Zhu, AD Cameron, et al.

Journal article  |  2021  |  ASTROPHYSICAL JOURNAL LETTERS

A nanohertz-frequency stochastic gravitational-wave background can potentially be detected through the precise timing of an array ..

An interactive gravitational-wave detector model for museums and fairs

SJ Cooper, AC Green, HR Middleton, CPL Berry, R Buscicchio, E Butler, CJ Collins, C Gettings, D Hoyland, AW Jones, JH Lindon, I Romero-Shaw, SP Stevenson, EP Takeva, S Vinciguerra, A Vecchio, CM Mow-Lowry, A Freise

Journal article  |  2021  |  AMERICAN JOURNAL OF PHYSICS

In 2015, the first observation of gravitational waves marked a breakthrough in astrophysics and in technological research and deve..

Evidence for Hierarchical Black Hole Mergers in the Second LIGO-Virgo Gravitational Wave Catalog

Chase Kimball, Colm Talbot, Christopher PL Berry, Michael Zevin, Eric Thrane, Vicky Kalogera, Riccardo Buscicchio, Matthew Carney, Thomas Dent, Hannah Middleton, Ethan Payne, John Veitch, Daniel Williams

Journal article  |  2021  |  ASTROPHYSICAL JOURNAL LETTERS

We study the population properties of merging binary black holes in the second LIGO-Virgo Gravitational-Wave Transient Catalog ass..

Massive black hole binary systems and the NANOGrav 12.5 yr results

H Middleton, A Sesana, S Chen, A Vecchio, W Del Pozzo, PA Rosado

Journal article  |  2021  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) recently reported evidence for the presence of a commo..

Gravitational-wave Constraints on the Equatorial Ellipticity of Millisecond Pulsars

R Abbott, TD Abbott, S Abraham, F Acernese, K Ackley, A Adams, C Adams, RX Adhikari, VB Adya, C Affeldt, M Agathos, K Agatsuma, N Aggarwal, OD Aguiar, L Aiello, A Ain, P Ajith, G Allen, A Allocca, PA Altin, et al.

Journal article  |  2020  |  ASTROPHYSICAL JOURNAL LETTERS

We present a search for continuous gravitational waves from five radio pulsars, comprising three recycled pulsars (PSR J0437-4715,..

Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA

BP Abbott, R Abbott, TD Abbott, S Abraham, F Acernese, K Ackley, C Adams, VB Adya, C Affeldt, M Agathos, K Agatsuma, N Aggarwal, OD Aguiar, L Aiello, A Ain, P Ajith, T Akutsu, G Allen, A Allocca, MA Aloy, et al.

Journal article  |  2020  |  LIVING REVIEWS IN RELATIVITY

We present our current best estimate of the plausible observing scenarios for the Advanced LIGO, Advanced Virgo and KAGRA gravitat..

GW190521: A Binary Black Hole Merger with a Total Mass of 150 M-circle dot

BP Abbott, R Abbott, TD Abbott, S Abraham, F Acernese, K Ackley, C Adams, RX Adhikari, VB Adya, C Affeldt, M Agathos, K Agatsuma, N Aggarwal, OD Aguiar, L Aiello, A Ain, P Ajith, G Allen, A Allocca, MA Aloy, et al.

Journal article  |  2020  |  PHYSICAL REVIEW LETTERS

On May 21, 2019 at 03:02:29 UTC Advanced LIGO and Advanced Virgo observed a short duration gravitational-wave signal, GW190521, wi..

Properties and Astrophysical Implications of the 150 M Binary Black Hole Merger GW190521

BP Abbott, R Abbott, TD Abbott, S Abraham, F Acernese, K Ackley, C Adams, RX Adhikari, VB Adya, C Affeldt, M Agathos, K Agatsuma, N Aggarwal, OD Aguiar, L Aiello, A Ain, P Ajith, G Allen, A Allocca, MA Aloy, et al.

Journal article  |  2020  |  ASTROPHYSICAL JOURNAL LETTERS

The gravitational-wave signal GW190521 is consistent with a binary black hole (BBH) merger source at redshift 0.8 with unusually h..

GW190412: Observation of a binary-black-hole coalescence with asymmetric masses

R Abbott, TD Abbott, S Abraham, F Acernese, K Ackley, C Adams, RX Adhikari, VB Adya, C Affeldt, M Agathos, K Agatsuma, N Aggarwal, OD Aguiar, A Aich, L Aiello, A Ain, P Ajith, S Akcay, G Allen, A Allocca, et al.

Journal article  |  2020  |  Physical Review D: Particles, Fields, Gravitation and Cosmology

We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO’s and Vir..