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  Study of 72 pulsars discovered in the PALFA survey: Timing analysis, glitch activity, emission variability, and a pulsar in an eccentric binary

Parent, E., Sewalls, H., Freire, P. C. C., Matheny, T., Lyne, A. G., Perera, B. B. P., et al. (2022). Study of 72 pulsars discovered in the PALFA survey: Timing analysis, glitch activity, emission variability, and a pulsar in an eccentric binary. The Astrophysical Journal, 924 (2): 135. doi:10.3847/1538-4357/ac375d.

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Parent, E., Author
Sewalls, H., Author
Freire, P. C. C., Author
Matheny, T., Author
Lyne, A. G., Author
Perera, B. B. P., Author
Cardoso, F., Author
McLaughlin, M. A., Author
Allen, B.1, Author              
Brazier, A., Author
Camilo, F., Author
Chatterjee, S., Author
Cordes, J. M., Author
Crawford, F., Author
Deneva, J. S., Author
Dong, F. A., Author
Ferdman, R. D., Author
Fonseca, E., Author
Hessels, J. W. T., Author
Kaspi, V. M., Author
Knispel, B.1, Author              van Leeuwen, J., AuthorLynch, R. S., AuthorMeyers, B. M., AuthorMcKee, J. W., AuthorMickaliger, M. B., AuthorPatel, C., AuthorRansom, S. M., AuthorRochon, A., AuthorScholz, P., AuthorStairs, I. H., AuthorStappers, B. W., AuthorTan, C. M., AuthorZhu, W. W., Author more..
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE, Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM
 Abstract: We present new discoveries and results from long-term timing of 72 pulsars discovered in the Arecibo PALFA survey, including precise determination of astrometric and spin parameters, and flux density and scatter broadening measurements at 1.4 GHz. Notable discoveries include two young pulsars (characteristic ages $\sim$30 kyr) with no apparent supernova remnant associations, three mode changing, 12 nulling and two intermittent pulsars. We detected eight glitches in five pulsars. Among them is PSR J1939+2609, an apparently old pulsar (characteristic age $\sim$1 Gy), and PSR J1954+2529, which likely belongs to a newly-emerging class of binary pulsars. The latter is the only pulsar among the 72 that is clearly not isolated: a non-recycled neutron star with a 931-ms spin period in an eccentric ($e\,=\,0.114$) wide ($P_b\,=\,82.7\,$d) orbit with a companion of undetermined nature having a minimum mass of $\sim0.6\,M_{\odot}$. Since operations at Arecibo ceased in 2020 August, we give a final tally of PALFA sky coverage, and compare its 207 pulsar discoveries to the known population. On average, they are 50% more distant than other Galactic plane radio pulsars; PALFA millisecond pulsars (MSP) have twice the dispersion measure per unit spin period than the known population of MSP in the Plane. The four intermittent pulsars discovered by PALFA more than double the population of such objects, which should help to improve our understanding of pulsar magnetosphere physics. The statistics for these, RRATS, and nulling pulsars suggest that there are many more of these objects in the Galaxy than was previously thought.

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 Dates: 2021-08-042021-11-172022
 Publication Status: Published in print
 Pages: 39 pages, 18 figures, 9 tables. Accepted for publication in ApJ
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2108.02320
DOI: 10.3847/1538-4357/ac375d
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 924 (2) Sequence Number: 135 Start / End Page: - Identifier: -