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  Two long-term intermittent pulsars discovered in the PALFA Survey

Lyne, A. G., Stappers, B. W., Freire, P. C. C., Hessels, J. W. T., Kaspi, V. M., Allen, B., et al. (2017). Two long-term intermittent pulsars discovered in the PALFA Survey. The Astrophysical Journal, 834(1): 72. doi:10.3847/1538-4357/834/1/72.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-931F-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-8762-C
Genre: Journal Article

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 Creators:
Lyne, A. G., Author
Stappers, B. W., Author
Freire, P. C. C., Author
Hessels, J. W. T., Author
Kaspi, V. M., Author
Allen, B.1, Author              
Bogdanov, S., Author
Brazier, A., Author
Camilo, F., Author
Cardoso, F., Author
Chatterjee, S., Author
Cordes, J. M., Author
Crawford, F., Author
Deneva, J. S., Author
Ferdman, R. D., Author
Jenet, F. A., Author
Knispel, B.1, Author              
Lazarus, P., Author
van Leeuwen, J., Author
Lynch, R., Author
Madsen, E., AuthorMcLaughlin, M. A., AuthorParent, E., AuthorPatel, C., AuthorRansom, S. M., AuthorScholz, P., AuthorSeymour, A., AuthorSiemens, X., AuthorSpitler, L. G., AuthorStairs, I. H., AuthorStovall, K., AuthorSwiggum, J., AuthorWharton, R. S., AuthorZhu, W. W., Author more..
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:24011              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: We report the discovery of two long-term intermittent radio pulsars in the ongoing Arecibo PALFA pulsar survey. Following discovery with the Arecibo Telescope, extended observations of these pulsars over several years at Jodrell Bank Observatory have revealed the details of their rotation and radiation properties. PSRs J1910+0517 and J1929+1357 show long-term extreme bi-modal intermittency, switching between active (ON) and inactive (OFF) emission states and indicating the presence of a large, hitherto unrecognised, underlying population of such objects. For PSR J1929+1357, the initial duty cycle was fON=0.008, but two years later this changed, quite abruptly, to fON=0.16. This is the first time that a significant evolution in the activity of an intermittent pulsar has been seen and we show that the spin-down rate of the pulsar is proportional to the activity. The spin-down rate of PSR J1929+1357 is increased by a factor of 1.8 when it is in active mode, similar to the increase seen in the other three known long-term intermittent pulsars.

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 Dates: 2016-08-312016-12-082017
 Publication Status: Published in print
 Pages: 21 pages, 7 figures, accepted by ApJ
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 Rev. Method: -
 Identifiers: arXiv: 1608.09008
DOI: 10.3847/1538-4357/834/1/72
URI: http://arxiv.org/abs/1608.09008
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 834 (1) Sequence Number: 72 Start / End Page: - Identifier: -