December 4, 2025Open Access

ASKAP Detection of the Ultra-Long Spin Period Pulsar PSR J0901-4046

Key Points

Detection of radio pulses shows this pulsar emits consistently, enhancing understanding of long period pulsars.
Observations at 744 MHz to 1800 MHz reveal the pulsar's emissions, confirming its characteristics as an ultra-long period pulsar.
Multi-epoch data from ASKAP extends beyond previous findings, supporting the persistent nature of the pulsar's radio emission.
Detection highlights the necessity for further studies at lower frequencies, where the pulsar's spectrum shows significant changes.

Abstract

A radio source with a period of 75.88 s, suspected of being an ultra-long period pulsar, was discovered in 2020 with the MeerKAT radio telescope. Here, we report the detection of radio pulses from this object in multi-epoch ASKAP image data at frequencies between 744 MHz and 1800 MHz and a search for pulses made in Murchison Widefield Array data at 154 MHz. The ASKAP detections pre-date and extend other published observations and so support the belief the pulsar emission has been persistent. The non-detection of the pulsar in MWA data is consistent with a recent report that the spectrum turns over at low frequencies. An ASKAP image of the field centred at 943 MHz confirms the MeerKAT detection of diffuse emission surrounding the pulsar.

Read Full Paperexternally

Demander à l'IA

Bookmark

View Full Paper