Aditya Parthasarathy · Listening to the Universe through Pulsars

§ 05 / Catalogue

Selected publications.

82 peer-reviewed papers across MNRAS, A&A, Science, Nature Astronomy, ApJ, ApJL, Phys. Rev. D, Phys. Rev. Lett., and PASA, published between 2017 and 2026.

peer-reviewed papers

~12k

total citations

2,400+

citations, EPTA DR2 II alone

additional Astronomer's Telegrams

2017–'26

publication span

Highlighted

07 narrative papers · first-author · co-led · collaboration-led

H/01

The second data release from the European Pulsar Timing Array. II. Customised pulsar noise models for spatially correlated gravitational waves

EPTA Collaboration, InPTA Collaboration · A. Parthasarathy co-led the noise-analysis team (~30 researchers) · A&A 678, A49 (2023)

This paper lays out the noise-modelling framework that underpins the entire EPTA DR2 series, which together presented the first compelling evidence for the nanohertz gravitational wave background. It has accumulated over 2,400 citations and was recognised with the Frontiers of Science Award (2024/25) and the RAS Group Achievement Award (2024/25).

DOI

H/02

A gamma-ray pulsar timing array constrains the nanohertz gravitational wave background

Fermi-LAT Collaboration · M. Kerr & A. Parthasarathy as co-founders of the GPTA · Science 376, 521–523 (2022)

This work repurposed NASA's Fermi telescope as the only independent means of characterising the gravitational wave background spectrum outside of radio. Gamma-ray photons sidestep the interstellar medium entirely, and overlapping pulsars in both bands give a unique lever arm for isolating spin noise and the ISM models used by radio PTAs.

Science

H/03

Measurements of pulse jitter and single-pulse variability in millisecond pulsars using MeerKAT

A. Parthasarathy, M. Bailes, R. M. Shannon, W. van Straten, S. Oslowski, et al. · MNRAS 502, 407–422 (2021)

This paper established MeerKAT as a premier pulsar timing instrument. I led the commissioning of the pulsar timing backend and built meerpipe, the primary timing pipeline, which has processed over 30,000 observations of roughly 1,500 pulsars to date. The paper reports high-precision timing for more than 20 millisecond pulsars, including the most precisely timed pulsar ever observed, at better than 5 ns.

DOI

H/04

Combining the second data release of the European Pulsar Timing Array with low-frequency pulsar data

F. Iraci, A. Chalumeau … A. Parthasarathy, et al. · A&A 704, A109 (2025)

Co-led by a postdoc in my group, this paper shows that adding LOFAR low-frequency data sharpens dispersion-measure tracking, isolates plasma propagation effects, and exposes solar-wind biases. It provides direct observational evidence that multi-frequency PTAs are more sensitive to the gravitational wave background, and reflects the group's growing leadership on IPTA noise modelling and combined-data analyses.

DOI

H/05

Bow shock and Local Bubble plasma unveiled by the scintillating millisecond pulsar J0437−4715

D. J. Reardon, R. Main, S. K. Ocker … A. Parthasarathy, et al. · Nature Astronomy 9, 1053–1063 (2025)

This study resolves 25 distinct plasma structures along the line of sight to PSR J0437−4715 with MeerKAT. It reveals a bow shock within 5,000 AU of the pulsar and unexpectedly turbulent structure inside the Local Bubble. The results directly inform the noise-modelling strategy at the heart of the group's programme.

DOI

H/06

The second data release from the European Pulsar Timing Array. I. The dataset and timing analysis

EPTA Collaboration · J. Antoniadis, S. Babak, A.-S. Bak Nielsen, C. G. Bassa, … A. Parthasarathy, et al. · A&A 678, A48 (2023)

Companion paper to H/01. It presents the 24.7-year EPTA DR2 dataset and timing analysis that made the gravitational wave background evidence possible.

DOI

H/07

The second data release from the European Pulsar Timing Array. III. Search for gravitational wave signals

EPTA Collaboration, InPTA Collaboration · J. Antoniadis, P. Arumugam, S. Arumugam, … A. Parthasarathy, et al. · A&A 678, A50 (2023)

Companion paper to H/01. It reports the gravitational wave background search itself, with evidence at the 3 to 4 sigma level consistent with a Hellings–Downs correlation.

DOI

Full list, chronological

all 82 peer-reviewed papers

018

The Thousand Pulsar Array programme on MeerKAT X. Scintillation arcs of 107 pulsars.

Main, R. A., A. Parthasarathy, et al.

MNRAS 518, 1086–1097

019

Searches for Shapiro delay in seven binary pulsars using the MeerKAT telescope.

Shamohammadi, M., ..., A. Parthasarathy, et al.

MNRAS 520, 1789–1806

020

The Thousand Pulsar Array program on MeerKAT IX. The time-averaged properties of the observed pulsar population.

Posselt, B., ..., A. Parthasarathy, et al.

MNRAS 520, 4582–4600

021

A MeerKAT look at the polarization of 47 Tucanae pulsars: magnetic field implications.

Abbate, F., ..., A. Parthasarathy, et al.

MNRAS 518, 1642–1655

022

Mass measurements and 3D orbital geometry of PSR J1933−6211.

Geyer, M., ..., A. Parthasarathy, et al.

A&A 674, A169

023

Practical approaches to analyzing PTA data: Cosmic strings with six pulsars.

Quelquejay Leclere, H., ..., A. Parthasarathy, et al.

Phys. Rev. D 108, 123527

024

PSR J1910−5959A: A rare gravitational laboratory for testing white dwarf models.

Corongiu, A., ..., A. Parthasarathy, et al.

A&A 671, A72

025

Rotational and radio emission properties of PSR J0738−4042 over half a century.

Lower, M. E., ..., A. Parthasarathy, et al.

MNRAS 524, 5904–5917

026

Searching for continuous Gravitational Waves in the second data release of the International Pulsar Timing Array.

Falxa, M., ..., A. Parthasarathy, et al.

MNRAS 521, 5077–5086

027

Second Data Release from the European Pulsar Timing Array: Challenging the Ultralight Dark Matter Paradigm.

Smarra, C., ..., A. Parthasarathy, et al.

Phys. Rev. Lett. 131, 171001

028

The MeerKAT Pulsar Timing Array: first data release.

Miles, M. T., ..., A. Parthasarathy, et al.

MNRAS 519, 3976–3991

029

The MPIfR-MeerKAT Galactic Plane Survey. II. The eccentric double neutron star system PSR J1208−5936 and a neutron star merger rate update.

Colom i Bernadich, M., ..., A. Parthasarathy, et al.

A&A 678, A187

030

The second data release from the European Pulsar Timing Array. I. The dataset and timing analysis. [highlighted]

EPTA Collaboration, ..., A. Parthasarathy, et al.

A&A 678, A48

031

The second data release from the European Pulsar Timing Array. II. Customised pulsar noise models for spatially correlated gravitational waves. [highlighted]

EPTA & InPTA Collaborations, ..., A. Parthasarathy, et al.

A&A 678, A49

032

The second data release from the European Pulsar Timing Array. III. Search for gravitational wave signals. [highlighted]

EPTA & InPTA Collaborations, ..., A. Parthasarathy, et al.

A&A 678, A50

033

The Third Fermi Large Area Telescope Catalog of Gamma-Ray Pulsars.

Smith, D. A., ..., A. Parthasarathy, et al.

ApJ 958, 191

034

The Thousand-Pulsar-Array programme on MeerKAT VIII. The subpulse modulation of 1198 pulsars.

Song, X., ..., A. Parthasarathy, et al.

MNRAS 520, 4562–4581

035

The Thousand-Pulsar-Array programme on MeerKAT XI. Application of the rotating vector model.

Johnston, S., ..., A. Parthasarathy, et al.

MNRAS 520, 4801–4814

036

The thousand-pulsar-array programme on MeerKAT VII: polarisation properties of pulsars in the Magellanic Clouds.

Johnston, S., A. Parthasarathy, et al.

MNRAS 509, 5209–5217

037

Gravitational signal propagation in the double pulsar studied with the MeerKAT telescope.

Hu, H., ..., A. Parthasarathy, et al.

A&A 667, A149

038

The MeerTime Pulsar Timing Array: A census of emission properties and timing potential.

Spiewak, R., ..., A. Parthasarathy, et al.

PASA 39, e027

039

A Detection of Red Noise in PSR J1824−2452A and Projections for PSR B1937+21 Using NICER X-Ray Timing Data.

Hazboun, J. S., ..., A. Parthasarathy, et al.

ApJ 928, 67

040

A gamma-ray pulsar timing array constrains the nanohertz gravitational wave background. [highlighted]

Fermi-LAT Collaboration, ..., A. Parthasarathy, et al.

Science 376, 521–523

041

Discoveries and timing of pulsars in NGC 6440.

Vleeschower, L., ..., A. Parthasarathy, et al.

MNRAS 513, 1386–1399

042

High-precision search for dark photon dark matter with the Parkes Pulsar Timing Array.

Xue, X., ..., A. Parthasarathy, et al.

Phys. Rev. Research 4, L012022

043

Noise analysis in the European Pulsar Timing Array data release 2 and its implications on the gravitational wave background search.

Chalumeau, A., ..., A. Parthasarathy, et al.

MNRAS 509, 5538–5558

044

The eccentric millisecond pulsar, PSR J0955−6150. I. Pulse profile analysis, mass measurements, and constraints on binary evolution.

Serylak, M., ..., A. Parthasarathy, et al.

A&A 665, A53

045

The International Pulsar Timing Array second data release: Search for an isotropic gravitational wave background.

Antoniadis, J., ..., A. Parthasarathy, et al.

MNRAS 510, 4873–4887

046

TRAPUM discovery of 13 new pulsars in NGC 1851 using MeerKAT.

Ridolfi, A., ..., A. Parthasarathy, et al.

A&A 664, A27

047

Measurements of pulse jitter and single-pulse variability in millisecond pulsars using MeerKAT. [highlighted]

A. Parthasarathy et al.

MNRAS 502, 407–422

048

The Thousand-Pulsar-Array programme on MeerKAT VI. Pulse widths of a large and diverse sample of radio pulsars.

Posselt, B., ..., A. Parthasarathy, et al.

MNRAS 508, 4249–4268

049

A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy.

Riley, T. E., ..., A. Parthasarathy, et al.

ApJL 918, L27

050

A polarization census of bright pulsars using the ultrawideband receiver on the Parkes radio telescope.

Sobey, C., ..., A. Parthasarathy, et al.

MNRAS 504, 228–247

051

Common-red-signal analysis with 24-yr high-precision timing of the European Pulsar Timing Array: inferences in the stochastic gravitational wave background search.

Chen, S., ..., A. Parthasarathy, et al.

MNRAS 508, 4970–4993

052

Eight new millisecond pulsars from the first MeerKAT globular cluster census.

Ridolfi, A., ..., A. Parthasarathy, et al.

MNRAS 504, 1407–1426

053

Identifying and mitigating noise sources in precision pulsar timing data sets.

Goncharov, B., ..., A. Parthasarathy, et al.

MNRAS 502, 478–493

054

Multifrequency observations of SGR J1935+2154.

Bailes, M., ..., A. Parthasarathy, et al.

MNRAS 503, 5367–5384

055

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

Goncharov, B., ..., A. Parthasarathy, et al.

ApJL 917, L19

056

Refined Mass and Geometric Measurements of the High-mass PSR J0740+6620.

Fonseca, E., ..., A. Parthasarathy, et al.

ApJL 915, L12

057

The impact of glitches on young pulsar rotational evolution.

Lower, M. E., ..., A. Parthasarathy, et al.

MNRAS 508, 3251–3274

058

The Radius of PSR J0740+6620 from NICER and XMM-Newton Data.

Miller, M. C., ..., A. Parthasarathy, et al.

ApJL 918, L28

059

The relativistic binary programme on MeerKAT: science objectives and first results.

Kramer, M., ..., A. Parthasarathy, et al.

MNRAS 504, 2094–2114

060

The Thousand-Pulsar-Array programme on MeerKAT II. Observing strategy for pulsar monitoring with subarrays.

Song, X., ..., A. Parthasarathy, et al.

MNRAS 505, 4456–4467

061

The Thousand-Pulsar-Array programme on MeerKAT V. Scattering analysis of single-component pulsars.

Oswald, L. S., ..., A. Parthasarathy, et al.

MNRAS 504, 1115–1128

062

The thousand-pulsar-array programme on MeerKAT IV: Polarization properties of young, energetic pulsars.

Serylak, M., ..., A. Parthasarathy, et al.

MNRAS 505, 4483–4495

063

Two years of pulsar observations with the ultra-wide-band receiver on the Parkes radio telescope.

Johnston, S., ..., A. Parthasarathy, et al.

MNRAS 502, 1253–1262

Full list on ADS →

Hearing the universe in the
quiet ticking of distant stars.

A research programme at ASTRON.

The GIGA group at ASTRON.

Recent news.

The Nanohertz Sky.

A fingerprint in the sky.

Selected publications.

Highlighted

Full list, chronological

Hearing the universe in the quiet ticking of distant stars.

A research programme at ASTRON.

The GIGA group at ASTRON.

Recent news.

The Nanohertz Sky.

A fingerprint in the sky.

Selected publications.

Highlighted

Full list, chronological

Hearing the universe in the
quiet ticking of distant stars.