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  Four Highly Dispersed Millisecond Pulsars Discovered in the Arecibo PALFA Galactic Plane Survey

Crawford, F., Stovall, K., Lyne, A. G., Stappers, B. W., Nice, D. J., Stairs, I. H., et al. (2012). Four Highly Dispersed Millisecond Pulsars Discovered in the Arecibo PALFA Galactic Plane Survey. Astrophysical Journal, 757: 90. doi:10.1088/0004-637X/757/1/90.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-B315-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-B316-A
Genre: Journal Article

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 Creators:
Crawford, F., Author
Stovall, K., Author
Lyne, A. G., Author
Stappers, B. W., Author
Nice, D. J., Author
Stairs, I. H., Author
Lazarus, P., Author
Hessels, J. W. T., Author
Freire, P. C. C., Author
Allen, B.1, Author              
Bhat, N. D. R., Author
Bogdanov, S., Author
Brazier, A., Author
Camilo, F., Author
Champion, D. J., Author
Chatterjee, S., Author
Cognard, I., Author
Cordes, J. M., Author
Deneva, J. S., Author
Desvignes, G., Author
Jenet, F. A., AuthorKaspi, V. M., AuthorKnispel, B., AuthorKramer, M., Authorvan Leeuwen, J., AuthorLorimer, D. R., AuthorLynch, R., AuthorMcLaughlin, M. A., AuthorRansom, S. M., AuthorScholz, P., AuthorSiemens, X., AuthorVenkataraman, A., 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, Solar and Stellar Astrophysics, astro-ph.SR, Astrophysics, Galaxy Astrophysics, astro-ph.GA
 Abstract: We present the discovery and phase-coherent timing of four highly dispersed millisecond pulsars (MSPs) from the Arecibo PALFA Galactic plane survey: PSRs J1844+0115, J1850+0124, J1900+0308, and J1944+2236. Three of the four pulsars are in binary systems with low-mass companions, which are most likely white dwarfs, and which have orbital periods on the order of days. The fourth pulsar is isolated. All four pulsars have large dispersion measures (DM > 100 pc cm-3), are distant (> 3.4 kpc), faint at 1.4 GHz (< 0.2 mJy), and are fully recycled (with spin periods P between 3.5 and 4.9 ms). The three binaries also have very small orbital eccentricities, as expected for tidally circularized, fully recycled systems with low-mass companions. These four pulsars have DM/P ratios that are among the highest values for field MSPs in the Galaxy. These discoveries bring the total number of confirmed MSPs from the PALFA survey to fifteen. The discovery of these MSPs illustrates the power of PALFA for finding weak, distant MSPs at low-Galactic latitudes. This is important for accurate estimates of the Galactic MSP population and for the number of MSPs that the Square Kilometer Array can be expected to detect.

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 Dates: 2012-08-062012
 Publication Status: Published in print
 Pages: 23 pages, including 7 figures and 2 tables. Accepted to the Astrophysical Journal
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1208.1273
DOI: 10.1088/0004-637X/757/1/90
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Title: Astrophysical Journal
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 757 Sequence Number: 90 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_2