{"id":774969,"date":"2023-12-04T11:17:58","date_gmt":"2023-12-04T16:17:58","guid":{"rendered":"https:\/\/spaceweekly.com\/?p=774969"},"modified":"2023-12-04T11:17:58","modified_gmt":"2023-12-04T16:17:58","slug":"new-young-and-highly-scattered-pulsar-discovered-with-askap","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=774969","title":{"rendered":"New young and highly scattered pulsar discovered with ASKAP"},"content":{"rendered":"
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\n\n \n Normalized pulse profiles created from the summed Parkes UWL data of PSR J1032\u22125804 as a function of observing frequency. Credit: arXiv<\/i> (2023). DOI: 10.48550\/arxiv.2311.14880 \n <\/figcaption><\/figure>\n<\/p><\/div>\n<\/div>\n
Using the Australian Square Kilometer Array Pathfinder (ASKAP), astronomers have discovered a new pulsar, which has received the designation PSR J1032\u22125804. The newfound pulsar turned out to be relatively young and highly scattered. The finding was reported in a paper published Nov. 25 on the pre-print server arXiv<\/i>.<\/p>\n\n <\/p>\n<\/section>\n
Pulsars are rotating neutron stars with intense magnetic fields, emitting a beam of electromagnetic radiation. They are usually identified in the form of short bursts of radio emission; however, some of them are also observed using optical, X-ray and gamma-ray telescopes.\n<\/p>\n
Some radio pulsars are scattered as radio pulses from these objects traverse the turbulent interstellar medium and multi-path propagation causes temporal and spatial scattering. In general, highly scattered pulsars are hard to detect for the majority of astronomical surveys.\n<\/p>\n
Now, a team of astronomers led by Ziteng Wang of Curtin University in Australia, reports the detection of such a highly scattered pulsar. PSR J1032\u22125804 was identified in the ASKAP Variables and Slow Transients (VAST) survey during a search for circularly polarized sources. Follow-up observations using the 64-m Parkes Radio Telescope and the Murchison Widefield Array (MWA) confirmed its pulsar nature.\n<\/p>\n
The newly discovered pulsar is young as it has a characteristic age of 34,600 years. It has a long scattering timescale at 1 GHz\u2014of about 3.84 seconds, which makes it the third most scattered pulsar known to date. This explains why PSR J1032\u22125804 has not been detected by previous pulsar surveys.\n<\/p>\n
According to the study, PSR J1032\u22125804 has a period of 78.7 milliseconds, dispersion measure of approximately 819 pc\/cm3<\/sup>, and rotation measure of about -2,000 rad\/m2<\/sup>. The pulsar has a surface magnetic field strength of some 1.7 TG, and a spin-down luminosity of 2.9 undecillion erg\/s.\n<\/p>\n
ASKAP observations indicate that PSR J1032\u22125804 is a potential GPS (gigahertz-peaked spectrum) source and that it may host a pulsar wind nebula (PWN) and a supernova remnant (SNR) in its local environment. However, further studies are needed in order to confirm this.\n<\/p>\n
Summing up the results, the authors of the paper noted that the discovery of PSR J1032\u22125804 is promising in the context of future discoveries of highly scattered pulsars.\n<\/p>\n
“We can identify more highly scattered pulsars like PSR J1032\u22125804 with the high sensitivity and good resolution data from the ongoing ASKAP surveys. In the future, with the construction of next-generation radio telescopes such as the Square Kilometer Array, the Deep Synoptic Array, and the Next Generation Very Large Array, imaging domain searches will become a more powerful tool for discovering extreme pulsars (e.g., highly accelerated, highly scattered, and highly intermittent) that are hard to find via traditional surveys,” the researchers concluded.<\/p>\n
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More information:<\/strong> \n\t\t\t\t\t\t\t\t\t\t\t\tZiteng Wang et al, Discovery of a young, highly scattered pulsar PSR J1032-5804 with the Australian SKA Pathfinder, arXiv<\/i> (2023). DOI: 10.48550\/arxiv.2311.14880<\/p>\n