Explanipedia

MeerKAT observations of the spiral galaxy NGC 2997 in the S band Open

A. Damas-Segovia, R. Beck, Shude Mao, Aritra Basu, S. S. Sridhar , et al. · 2025

Aims. We seek to exploit the expanded observational range of the MeerKAT radio telescope with the new S-band receivers (2.0−2.8 GHz). To showcase its enhanced capabilities, we conducted new S-band observations of the galaxy NGC 2997 in ful…

TRAPUM search for pulsars in supernova remnants and pulsar wind nebulae – II. Survey analysis and population study Open

John D. Turner, B. W. Stappers, E D Barr, M. Burgay, M. C. i Bernadich , et al. · 2025

We present the second and final set of TRAPUM searches for pulsars at 1284 MHz inside supernova remnants and pulsar wind nebulae with the MeerKAT telescope. No new pulsars were detected for any of the 80 targets, which include some unident…

TRAPUM search for pulsars in supernova remnants and pulsar wind nebulae - II. Survey analysis and population study Open

J. D. Turner, B. W. Stappers, E D Barr, M. Burgay, M. C. i Bernadich , et al. · 2025

We present the second and final set of TRAPUM searches for pulsars at 1284 MHz inside supernova remnants and pulsar wind nebulae with the MeerKAT telescope. No new pulsars were detected for any of the 80 targets, which include some unident…

An RFSoC-based F-engine for ARGOS Open

Yunpeng Men, E D Barr, Amit Bansod, Weiwei Chen, Jason Wu , et al. · 2025

Context. Radio interferometers provide the means to perform the wide field-of-view (FoV) high-sensitivity observations required for modern radio surveys. As computing power per cost has increased, there has been a move toward larger arrays…

Detection of OH maser emission in the 71-year periodic comet 12P/Pons-Brooks using the 40-m Thai National Radio Telescope (TNRT) Open

Nobuyuki Sakai, S. Poshyachinda, Koichiro Sugiyama, W. Rujopakarn, Boonrucksar Soonthornthum , et al. · 2025

Although the optical cometary database is extensive, the radio database is limited. The 18-cm OH maser observations of comets allow us to determine (i) the production rate of OH ($Q_{\rm{OH}}$) and (ii) the water expansion velocity, for ea…

Multiwavelength observations of a new black-widow millisecond pulsar PSR J1544−2555 Open

Sonia Díaz, T Thongmeearkom, A Phosrisom, R. P. Breton, M. Burgay , et al. · 2025

We report the discovery of a new black-widow millisecond pulsar, PSR J1544–2555, associated with the Fermi-Large Area Telescope (LAT) source 4FGL J1544.2–2554. Optical, radio, and gamma-ray observations confirmed its nature as a compact sp…

A pulsar escaping from an open cluster: origin of neutron stars in the Milky Way Disk Open

Xiaoting Fu, Lei Zhang, Di Li, E Carli, Long Wang , et al. · 2025

Open clusters (OCs) are the primary contributors to the native stellar population of the Milky Way disk. Neutron stars (NSs) -- remnants of massive stars -- in the disk should also originate from OCs, along with the resulting pulsars. Howe…

A fast radio burst from the first 3 billion years of the Universe Open

Manisha Caleb, Themiya Nanayakkara, B. W. Stappers, Inés Pastor-Marazuela, Ilya S. Khrykin , et al. · 2025

Fast radio bursts (FRBs) are enigmatic millisecond-duration signals which encode otherwise unattainable information on the plasma which permeates our Universe, providing insights into magnetic fields and gas distributions. Here we report t…

Localisation and host galaxy identification of new Fast Radio Bursts with MeerKAT Open

Inés Pastor-Marazuela, Alexa C. Gordon, B. W. Stappers, Ilya S. Khrykin, Nicolás Tejos , et al. · 2025

Accurately localising fast radio bursts (FRBs) is essential for understanding their birth environments and for their use as cosmological probes. Recent advances in radio interferometry, particularly with MeerKAT, have enabled the localisat…

A Coherent Radio Burst from an X-Ray Neutron Star in the Carina Nebula Open

Kaustubh Rajwade, Jun Tian, George Younes, Bettina Posselt, B. W. Stappers , et al. · 2025

The neutron star zoo comprises several subpopulations that range from energetic magnetars and thermally emitting X-ray neutron stars to radio-emitting pulsars. Despite studies over the last five decades, it has been challenging to obtain a…

Discovery and Timing of Four <i>γ</i>-Ray Millisecond Pulsars Open

M. Kerr, S. Johnston, C. J. Clark, F. Camilo, E. C. Ferrara , et al. · 2025

We discovered four millisecond pulsars (MSPs) in searches of 80 γ -ray sources conducted from 2015 to 2017 with the Murriyang radio telescope of the Parkes Observatory. We provide an overview of the survey and focus on the results of a fol…

A coherent radio burst from an X-ray neutron star in the Carina Nebula Open

Kaustubh Rajwade, Jun Tian, George Younes, Bettina Posselt, B. W. Stappers , et al. · 2025

The neutron star zoo comprises several sub-populations that range from energetic magnetars and thermally emitting X-ray neutron stars to radio-emitting pulsars. Despite studies over the last five decades, it has been challenging to obtain …

Contemporaneous optical-radio observations of a fast radio burst in a close galaxy pair Open

K Y Hanmer, Inés Pastor-Marazuela, J. Brink, D. Malesani, B. W. Stappers , et al. · 2025

We present the MeerKAT discovery and MeerLICHT contemporaneous optical observations of the fast radio burst (FRB) 20230808F, which was found to have a dispersion measure of $\mathrm{DM}=653.2\pm 0.4\mathrm{\, pc\, cm^{-3}}$. FRB 20230808F …

A highly magnetized long-period radio transient exhibiting unusual emission features Open

Yunpeng Men, S. J. McSweeney, N. Hurley‐Walker, E D Barr, B. W. Stappers · 2025

Long-period radio transients are a new class of astrophysical objects that exhibit periodic radio emission on timescales of tens of minutes. Their true nature remains unknown; possibilities include magnetic white dwarfs, binary systems, or…

Discovery of 26 new Galactic radio transients by MeerTRAP Open

John D. Turner, B. W. Stappers, J Tian, M C Bezuidenhout, Manisha Caleb , et al. · 2025

Radio searches for single pulses provide the opportunity to discover one-off events, fast transients and some pulsars that might otherwise be missed by conventional periodicity searches. The MeerTRAP real-time search pipeline operates comm…

Discovery of 26 new Galactic radio transients by MeerTRAP Open

J. D. Turner, B. W. Stappers, Jun Tian, M C Bezuidenhout, Manisha Caleb , et al. · 2025

Radio searches for single pulses provide the opportunity to discover one-off events, fast transients and some pulsars that might otherwise be missed by conventional periodicity searches. The MeerTRAP real-time search pipeline operates comm…

The High Time Resolution Universe Pulsar Survey – XIX. A coherent GPU-accelerated reprocessing and the discovery of 71 pulsars in the Southern Galactic plane Open

Rahul Sengar, M. Bailes, V. Balakrishnan, E D Barr, N. D. R. Bhat , et al. · 2024

We conducted a GPU-accelerated reprocessing of $\sim 87~{{\ \rm per\ cent}}$ of the archival data from the High Time Resolution Universe South Low Latitude (HTRU-S LowLat) pulsar survey by implementing a pulsar search pipeline that was pre…

A first glimpse at the MeerKAT DEEP2 field at <i>S</i>-band Open

S. Ranchod, J. D. Wagenveld, H.-R. Klöckner, O. Wucknitz, Roger Deane , et al. · 2024

We present the first wide-field extragalactic continuum catalogue with the MeerKAT S-band (2.5 GHz), of the radio-selected DEEP2 field. The combined image over the S1 (1.96–2.84 GHz) and S4 (2.62–3.50 GHz) sub-bands has an angular resoluti…

A first glimpse at the MeerKAT DEEP2 field at S-band Open

S. Ranchod, J. D. Wagenveld, H.-R. Klöckner, O. Wucknitz, Roger Deane , et al. · 2024

We present the first widefield extragalactic continuum catalogue with the MeerKAT S-band (2.5 GHz), of the radio-selected DEEP2 field. The combined image over the S1 (1.96 - 2.84 GHz) and S4 (2.62 - 3.50 GHz) sub-bands has an angular resol…

TRAPUM pulsar and transient search in the Sextans A and B galaxies and discovery of background FRB 20210924D Open

E Carli, L. Levin, B. W. Stappers, E D Barr, R. P. Breton , et al. · 2024

The Small and Large Magellanic Clouds are the only galaxies outside our own in which radio pulsars have been discovered to date. The sensitivity of the MeerKAT radio interferometer offers an opportunity to search for a population of more d…

The TRAPUM Large Magellanic Cloud pulsar survey with MeerKAT – I. Survey set-up and first seven pulsar discoveries Open

Vinand Prayag, L. Levin, M. Geyer, B. W. Stappers, E Carli , et al. · 2024

The Large Magellanic Cloud (LMC) presents a unique environment for pulsar population studies due to its distinct star formation characteristics and proximity to the Milky Way. As part of the TRAPUM (TRAnsients and PUlsars with MeerKAT) Lar…

The TRAPUM Small Magellanic Cloud pulsar survey with MeerKAT – II. Nine new radio timing solutions and glitches from young pulsars Open

E Carli, D. Antonopoulou, M. Burgay, M. J. Keith, L. Levin , et al. · 2024

We report new radio timing solutions from a 3-yr observing campaign conducted with the MeerKAT and Murriyang telescopes for nine Small Magellanic Cloud pulsars, increasing the number of characterized rotation-powered extragalactic pulsars …

Searching for pulsars, magnetars, and fast radio bursts in the sculptor galaxy using MeerKAT Open

H Hurter, C. Venter, L. Levin, B. W. Stappers, E D Barr , et al. · 2024

The Sculptor Galaxy (NGC 253), located in the Southern Hemisphere, far off the Galactic Plane, has a relatively high star-formation rate of about 7 M$_{\odot }$ yr−1 and hosts a young and bright stellar population, including several super …

A study of two FRBs with low polarization fractions localized with the MeerTRAP transient buffer system Open

Kaustubh Rajwade, Laura Driessen, E D Barr, Inés Pastor-Marazuela, M. Berezina , et al. · 2024

Localization of fast radio bursts (FRBs) to arcsecond and subarcsecond precision maximizes their potential as cosmological probes. To that end, FRB detection instruments are deploying triggered complex-voltage capture systems to localize F…

An emission-state-switching radio transient with a 54-minute period Open

Manisha Caleb, E. Lenc, D. L. Kaplan, Tara Murphy, Yunpeng Men , et al. · 2024

The TRAPUM Small Magellanic Cloud pulsar survey with MeerKAT – I. Discovery of seven new pulsars and two Pulsar Wind Nebula associations Open

E Carli, L. Levin, B. W. Stappers, E D Barr, R. P. Breton , et al. · 2024

The sensitivity of the MeerKAT radio interferometer is an opportunity to probe deeper into the population of rare and faint extragalactic pulsars. The TRAPUM (TRAnsients and PUlsars with MeerKAT) collaboration has conducted a radio-domain …

TRAPUM search for pulsars in supernova remnants and pulsar wind nebulae − I. Survey description and initial discoveries Open

John D. Turner, B. W. Stappers, E Carli, E D Barr, W. Becker , et al. · 2024

We present the description and initial results of the TRAPUM (TRAnsients And PUlsars with MeerKAT) search for pulsars associated with supernova remnants (SNRs), pulsar wind nebulae, and unidentified TeV emission. The list of sources to be …

A Millisecond Pulsar Binary Embedded in a Galactic Center Radio Filament Open

M. E. Lower, Shi Dai, S. Johnston, E D Barr · 2024

The Galactic center is host to a population of extraordinary radio filaments, thin linear structures that trace out magnetic field lines running perpendicular to the Galactic plane. Using Murriyang, the 64 m Parkes radio telescope, we cond…

Discovery and timing of ten new millisecond pulsars in the globular cluster Terzan 5 Open

P V Padmanabh, S. M. Ransom, P. C. C. Freire, A. Ridolfi, Jackson Taylor , et al. · 2024

We report the discovery of ten new pulsars in the globular cluster Terzan 5 as part of the Transients and Pulsars with MeerKAT (TRAPUM) Large Survey Project. We observed Terzan 5 at L -band (856–1712 MHz) with the MeerKAT radio telescope f…

A targeted radio pulsar survey of redback candidates with MeerKAT Open

T Thongmeearkom, C. J. Clark, R. P. Breton, M. Burgay, L. Nieder , et al. · 2024

Redbacks are millisecond pulsar binaries with low-mass, irradiated companions. These systems have a rich phenomenology that can be used to probe binary evolution models, pulsar wind physics, and the neutron star mass distribution. A number…

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