Serendipitous Discovery of PSR J1431-6328 as a Highly Polarized Point Source with the Australian SKA Pathfinder
| Autor: | Dougal Dobie, Christene Lynch, Tara Murphy, C. S. Anderson, Andrew Cameron, George Hobbs, David L. Kaplan, Shi Dai, Emil Lenc, L. Toomey, Andrew Zic, Joseph K. Swiggum, Jane F. Kaczmarek |
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| Rok vydání: | 2019 |
| Předmět: |
010504 meteorology & atmospheric sciences
Point source Astrophysics::High Energy Astrophysical Phenomena Population FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences law.invention Radio telescope Telescope Pulsar law Millisecond pulsar 0103 physical sciences education 010303 astronomy & astrophysics 0105 earth and related environmental sciences High Energy Astrophysical Phenomena (astro-ph.HE) Physics education.field_of_study Astrophysics::Instrumentation and Methods for Astrophysics Astronomy Astronomy and Astrophysics Pathfinder Space and Planetary Science Orbital motion Astrophysics - High Energy Astrophysical Phenomena |
| Zdroj: | The Astrophysical Journal. 884:96 |
| ISSN: | 1538-4357 |
| Popis: | We identified a highly-polarized, steep-spectrum radio source in a deep image with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope at 888 MHz. After considering and rejecting a stellar origin for this source, we discovered a new millisecond pulsar (MSP) using observations from the Parkes radio telescope. This pulsar has period 2.77 ms and dispersion measure 228.27 pc/cm**3. Although this pulsar does not yet appear to be particularly remarkable, the short spin period, wide profile and high dispersion measure do make it relatively hard to discover through traditional blind periodicity searches. Over the course of several weeks we see changes in the barycentric period of this pulsar that are consistent with orbital motion in a binary system, but the properties of any binary need to be confirmed by further observations. While even a deep ASKAP survey may not identify large numbers of new MSPs compared to the existing population, it would be competitive with existing all-sky surveys and could discover interesting new MSPs at high Galactic latitude without the need for computationally-expensive all-sky periodicity searches. ApJ, in press |
| Databáze: | OpenAIRE |
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