A survey for radio pulsars and transients in the 10 pc region around Sgr A*
Year: 2025
Type: article
Abstract: Here we report on a new survey for pulsars and transients in the 10 pc region around Sgr A ∗ using the Effelsberg radio telescope at frequencies between 4 and 8 GHz. Our calibrated full-Stokes data were searched for pulsars and transients using PULSARX, TRANSIENTX, and PRESTO. Polarisation information is used in the scoring of the candidates. Our periodicity acceleration and jerk searches allowed us to maintain good sensitivity towards binary pulsars in ≳10-h orbits. In addition, we performed a dedicated search in linear polarisation for slow transients. While our searches yielded no new discovery beyond the redetection of the magnetar SGR J1745−2900, we report on a faint single pulse candidate in addition to several weak periodicity search candidates. After thoroughly assessing our survey’s sensitivity, we determined that it is still not sensitive to a population of millisecond pulsars. Next generation radio interferometers can overcome the limitations of traditional single-dish pulsar searches of the Galactic Centre.
Source: Astronomy and Astrophysics
Institutions: Max Planck Institute for Radio Astronomy, Chinese Academy of Sciences, National Astronomical Observatories, Osservatorio Astronomico di Cagliari, National Institute for Astrophysics, University of Manchester, Shanghai Astronomical Observatory, Peking University, Instituto de Radioastronomía Milimétrica
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,865
OpenAlex ID: W4417439878