MeerKAT caught a Mini Mouse: serendipitous detection of a young radio pulsar escaping its birth site.
In: Monthly Notices of the Royal Astronomical Society, Jg. 523 (2023-08-01), Heft 2, S. 2850-2857
Online
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Zugriff:
In MeerKAT observations pointed at a Galactic X-ray binary located on the Galactic plane, we serendipitously discovered a radio nebula with cometary-like morphology. The feature, which we named 'the Mini Mouse' based on its similarity with the previously discovered 'Mouse' nebula, points back towards the previously unidentified candidate supernova remnant G45.24+0.18. We observed the location of the Mini Mouse with MeerKAT in two different observations, and we localized with arcsecond precision the 138-ms radio pulsar PSR J1914+1054g, recently discovered by the FAST telescope, to a position consistent with the head of the nebula. We confirm a dispersion measure of about 418 pc cm−3 corresponding to a distance between 7.8 and 8.8 kpc based on models of the electron distribution. Using our accurate localization and two period measurements spaced 90 d apart, we calculate a period derivative of (2.7 ± 0.3) × 10 −14 s s−1. We derive a characteristic age of approximately 82 kyr and a spin-down luminosity of 4 × 1035 erg s−1. For a pulsar age comparable with the characteristic age, we find that the projected velocity of the neutron star is between 320 and 360 km s−1 if it was born at the location of the supernova remnant. The size of the proposed remnant appears small if compared with the pulsar characteristic age; however, the relatively high density of the environment near the Galactic plane could explain a suppressed expansion rate and thus a smaller remnant. [ABSTRACT FROM AUTHOR]
Titel: |
MeerKAT caught a Mini Mouse: serendipitous detection of a young radio pulsar escaping its birth site.
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Autor/in / Beteiligte Person: | Motta, S E ; Turner, J D ; Stappers, B ; Fender, R P ; Heywood, I ; Kramer, M ; Barr, E D |
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Zeitschrift: | Monthly Notices of the Royal Astronomical Society, Jg. 523 (2023-08-01), Heft 2, S. 2850-2857 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 0035-8711 (print) |
DOI: | 10.1093/mnras/stad1438 |
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