523 citations · 3.3k across the 56 of their papers we have counts for
57 papers
Fifteen new millisecond pulsars in 47 Tucanae
W. Chen, D. Risbud, P. C. C. Freire +16
47 Tucanae is one of the largest, brightest, and closest globular clusters to Earth. It hosts an exotic stellar population with stellar dynamics that indicate a complex evolution h…
Pulsar Discoveries from the TRAPUM UHF Survey of Fermi-LAT Sources
Tinn Thongmeearkom, Colin J. Clark, Rene P. Breton +25
The Fermi Large Area Telescope (LAT) provides advantages for radio pulsar searches by enabling efficient target selection. We can confidently point radio telescopes to the position…
Globular Clusters GMRT Pulsar Search (GCGPS) II: Discovery of five MSPs in M69 and M70
Jyotirmoy Das, Jayanta Roy, Paulo C. C. Freire +6
This paper reports recent discoveries from the Globular Clusters GMRT Pulsar Search (GCGPS) survey, which aims to uncover pulsars in the globular clusters (GCs) of the Milky Way us…
Millisecond Pulsars in M2: New discoveries and a detailed timing analysis
Baoda Li, Kuo Liu, Lin Wang +13
Globular clusters (GCs) offer a unique environment for discovering and studying millisecond pulsars. In this paper, we present a multi-epoch search and detailed timing analysis of…
The Timing Evolution of the Magnetar Swift J1818.0-1607 During a Period of Reduced Activity
Moaz Abdelmaguid, Paulo C. C. Freire, Joseph D. Gelfand +3
We report results from an observational campaign of the radio-loud magnetar Swift J1818.0-1607 using the Green Bank Telescope (GBT) at 2.0 GHz, which began in November 2021 during…
The FAST Globular Cluster Pulsar Survey (GC FANS)
Yujie Lian, Zhichen Pan, Haiyan Zhang +24
By January 2025, 60 pulsars were discovered by the Five-hundred-meter Aperture Spherical radio Telescope globular cluster (GC) pulsar survey (GC FANS), with spin periods spanning 1…
Probing Globular Cluster with MeerKAT and FAST: A Pulsar Polarization Census
Lei Zhang, Federico Abbate, Di Li +13
Only one globular cluster (GC), 47 Tuc, has been found to contain intracluster medium, with an electron density 100 times higher than that of the ISM in its vicinity. The character…
Thirty-five years of timing of M53A with Arecibo and FAST
Yujie Lian, P. C. C. Freire, Shuo Cao +6
PSR B1310+18A is a 33-ms binary pulsar in a 256-day, low eccentricity orbit with a low-mass companion located in NGC 5024 (M53). In this Letter, we present the first phase-coherent…
Discovery and Timing of 49 Pulsars from the Arecibo 327-MHz Drift Survey
Timothy E. E. Olszanski, Evan F. Lewis, Julia S. Deneva +6
We present 18 pulsar discoveries from the AO327 pulsar survey, along with their timing solutions and those for an additional 31 AO327-discovered pulsars. Timing solutions were cons…
A 34 Yr Timing Solution of the Redback Millisecond Pulsar Terzan 5A
Alexandra C. Rosenthal, Scott M. Ransom, Kyle A. Corcoran +12
We present a 34-year timing solution of the redback pulsar system Terzan 5A (Ter5A). Ter5A, also known as B174424A or J17482446A, has a 11.56 ms pulse period, a 0.1 sol…
Triple trouble with PSR J1618-3921: Mass measurements and orbital dynamics of an eccentric millisecond pulsar
K. Grunthal, V. Venkatraman Krishnan, P. C. C. Freire +11
PSR J1618-3921 is one of five known millisecond pulsars (MSPs) in eccentric orbits (eMPSs) located in the Galactic plane, whose formation is poorly understood. Earlier studies of t…
A millisecond pulsar position determined to 0.2 milliarcsecond precision with VLBI
Hao Ding, Adam T. Deller, Paulo C. C. Freire +1
Precise millisecond pulsar (MSP) positions determined with very long baseline interferometry (VLBI) hold the key to building the connection between the kinematic and dynamic refere…
Timing of millisecond pulsars in NGC\,6752 -- III. On the presence of non-luminous matter in the cluster's core
A. Corongiu, A. Ridolfi, F. Abbate +9
Millisecond pulsars are subject to accelerations in globular clusters (GCs) that manifest themselves in both the first and second spin period time derivatives, and can be used to e…
Discoveries and Timing of Pulsars in M62
L. Vleeschower, A. Corongiu, B. W. Stappers +14
Using MeerKAT, we have discovered three new millisecond pulsars (MSPs) in the bulge globular cluster M62: M62H, M62I, and M62J. All three are in binary systems, which means all ten…
A targeted radio pulsar survey of redback candidates with MeerKAT
T. Thongmeearkom, C. J. Clark, R. P. Breton +18
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 win…
Measuring the Lense-Thirring Orbital Precession and the Neutron Star Moment of Inertia with Pulsars
Huanchen Hu, Paulo C. C. Freire
Neutron stars (NSs) are compact objects that host the densest forms of matter in the observable universe, providing unique opportunities to study the behaviour of matter at extreme…
Discovery and timing of ten new millisecond pulsars in the globular cluster Terzan 5
P. V. Padmanabh, S. M. Ransom, P. C. C. Freire +23
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 a…
Characterizing the Gamma-ray Emission Properties of the Globular Cluster M5 with the Fermi-LAT
X. Hou, W. Zhang, P. C. C. Freire +14
We analyzed the globular cluster M5 (NGC 5904) using 15 years of gamma-ray data from the Fermi Large Area Telescope (LAT). Using rotation ephemerides generated from Arecibo and FAS…
A VLITE Search for Millisecond Pulsars in Globular Clusters: Discovery of a Pulsar in GLIMPSE-C01
Amaris V. McCarver, Thomas J. Maccarone, Scott M. Ransom +8
We present results from a search for pulsars in globular clusters, including the discovery of a new millisecond pulsar in the stellar cluster GLIMPSE-C01. We searched for low frequ…
The discovery of three pulsars in the globular cluster M15 with the FAST
Yuxiao Wu, Zhichen Pan, Lei Qian +17
We present the discovery of three pulsars in the Globular Cluster (GC) M15 (NGC 7078) by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). PSR J2129+1210J (M15J) is…
A discovery of Two Slow Pulsars with FAST: "Ronin" from the Globular Cluster M15
Dengke Zhou, Pei Wang, Di Li +26
Globular clusters harbor numerous millisecond pulsars, but long-period pulsars ( ms) are rarely found. In this study, we employed a fast folding algorithm to analyze…
The Relativistic Binary Programme on MeerKAT: Science objectives and first results
M. Kramer, I. H. Stairs, V. Venkatraman Krishnan +35
We describe the ongoing Relativistic Binary programme (RelBin), a part of the MeerTime large survey project with the MeerKAT radio telescope. RelBin is primarily focused on observa…
Discovery of a Gamma-ray Black Widow Pulsar by GPU-accelerated Einstein@Home
L. Nieder, C. J. Clark, D. Kandel +39
We report the discovery of 1.97 ms period gamma-ray pulsations from the 75 minute orbital-period binary pulsar now named PSR J1653-0158. The associated Fermi Large Area Telescope g…
A precise mass measurement of PSR J2045+3633
J. W. McKee, P. C. C. Freire, M. Berezina +10
We present the results of a timing analysis undertaken with the goal of obtaining an improved mass measurement of the recycled pulsar J2045+3633. Using regular high-cadence observa…