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http://hdl.handle.net/20.500.12386/32209
Title: | Timing observations of three Galactic millisecond pulsars | Authors: | Lorimer, D. R. Kawash, A. M. Freire, P. C. C. Smith, D. A. Kerr, M. McLaughlin, M. A. Mickaliger, M. B. Spiewak, R. Bailes, M. Barr, E. BURGAY, MARTA Cameron, A. D. Camilo, F. Johnston, S. Jankowski, F. Keane, E. F. Keith, M. Kramer, M. POSSENTI, ANDREA |
Issue Date: | 2021 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 507 | Issue: | 4 | First Page: | 5303 | Abstract: | We report observed and derived timing parameters for three millisecond pulsars (MSPs) from observations collected with the Parkes 64-m telescope, Murriyang. The pulsars were found during reprocessing of archival survey data by Mickaliger et al. One of the new pulsars (PSR J1546-5925) has a spin period P = 7.8 ms and is isolated. The other two (PSR J0921-5202 with P = 9.7 ms and PSR J1146-6610 with P = 3.7 ms) are in binary systems around low-mass (${\gt}0.2\, {\rm M}_{\odot }$) companions. Their respective orbital periods are 38.2 and 62.8 d. While PSR J0921-5202 has a low orbital eccentricity e = 1.3 × 10<SUP>-5</SUP>, in keeping with many other Galactic MSPs, PSR J1146-6610 has a significantly larger eccentricity, e = 7.4 × 10<SUP>-3</SUP>. This makes it a likely member of a group of eccentric MSP-helium white dwarf binary systems in the Galactic disc whose formation is poorly understood. Two of the pulsars are co-located with previously unidentified point sources discovered with the Fermi satellite's Large Area Telescope, but no γ-ray pulsations have been detected, likely due to their low spin-down powers. We also show that, particularly in terms of orbital diversity, the current sample of MSPs is far from complete and is subject to a number of selection biases. | URI: | http://hdl.handle.net/20.500.12386/32209 | URL: | https://academic.oup.com/mnras/article/507/4/5303/6362610 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stab2474 | Bibcode ADS: | 2021MNRAS.507.5303L | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Lorimer2021_editorial.pdf | Pdf editoriale | 805.18 kB | Adobe PDF | View/Open |
Lorimer2021_preprint.pdf | postprint | 417.43 kB | Adobe PDF | View/Open |
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