The first MeerKAT S-band globular cluster pulsar survey

@misc{nag2026first,
  title = {{The first MeerKAT S-band globular cluster pulsar survey}},
  author = {Rouhin Nag and Marta Burgay and Alessandro Ridolfi and Federico Abbate and Andrea Possenti and Paulo C. C. Freire and Scott M. Ransom and Miquel Colom i Bernadich and Michael Kramer and Benjamin W. Stappers and Ewan D. Barr and Rene P. Breton and Vivek Venkatraman Krishnan and Prajwal V. Padmanabh and Weiwei Chen and David J. Champion and Maciej Serylak and Alessandro Corongiu and Mario Cadelano and Vishnu Balakrishnan and Arunima Dutta and Dhanraj Risbud},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.10184},
  eprint = {2609.10184},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.10184},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - The first MeerKAT S-band globular cluster pulsar survey
AU  - Rouhin Nag
AU  - Marta Burgay
AU  - Alessandro Ridolfi
AU  - Federico Abbate
AU  - Andrea Possenti
AU  - Paulo C. C. Freire
AU  - Scott M. Ransom
AU  - Miquel Colom i Bernadich
AU  - Michael Kramer
AU  - Benjamin W. Stappers
AU  - Ewan D. Barr
AU  - Rene P. Breton
AU  - Vivek Venkatraman Krishnan
AU  - Prajwal V. Padmanabh
AU  - Weiwei Chen
AU  - David J. Champion
AU  - Maciej Serylak
AU  - Alessandro Corongiu
AU  - Mario Cadelano
AU  - Vishnu Balakrishnan
AU  - Arunima Dutta
AU  - Dhanraj Risbud
PY  - 2026
DA  - 2026/09/09
PB  - arXiv
DO  - 10.48550/arxiv.2609.10184
UR  - https://arxiv.org/abs/2609.10184
AB  - Globular clusters are efficient factories of recycled pulsars, but searches toward high-dispersion-measure (DM) clusters can be strongly limited near 1 GHz by dispersive smearing and interstellar scattering. We present the first MeerKAT S-band (nu ~ 2.4 GHz) pulsar survey of 14 globular clusters. High time- and frequency-resolution observations were searched using segmented acceleration and jerk techniques, followed by candidate folding and targeted folding with available timing ephemerides. We re-detected 39 known pulsars and discovered four new millisecond pulsars in Glimpse-C01: J1848-0129C, D, E, and F. Multi-epoch follow-up enabled preliminary Keplerian orbital fits for J1848-0129C and J1848-0129D. J1848-0129C is an eclipsing MSP in a ~5 d orbit, placing it among long-period eclipsing systems known as huntsman binaries, while J1848-0129D is in a ~3.4 d nearly circular orbit with a massive white-dwarf companion of about 1 solar mass. Two Glimpse-C01 pulsars show large DM offsets from the cluster average. Comparison with other Galactic globular clusters indicates that intracluster DM spreads tend to increase with foreground DM, implying that narrow DM search windows may be sub-optimal for high-DM clusters. From detections and non-detections, we infer a practical single-epoch MeerKAT S-band tied-array detectability scale of about 10-20 microJy. These results demonstrate the value of high-frequency searches for pulsars in strongly dispersed and scattered cluster environments.
ER  -