TIMING OF FIVE MILLISECOND PULSARS DISCOVERED IN THE PALFA SURVEY

Journal Article · Fri Feb 20 04:00:00 EST 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/800/2/123· OSTI ID:22522103

Scholz, P.; Kaspi, V. M.; Ferdman, R. D.; Karako-Argaman, C. ^[1]; Lyne, A. G.; Stappers, B. W. ^[2]; Bogdanov, S.; Camilo, F. ^[3]; Cordes, J. M.; Brazier, A.; Chatterjee, S. ^[4]; Crawford, F. ^[5]; Freire, P. C. C. ^[6]; Hessels, J. W. T. ^[7]; Lorimer, D. R.; Cardoso, R. F. ^[8]; Stairs, I. H. ^[9]; Allen, B. ^[10]; Deneva, J. S. ^[11]; others, and

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1. Department of Physics, McGill University, Montreal, QC H3A 2T8 (Canada)
2. Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)
3. Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States)
4. Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States)
5. Department of Physics and Astronomy, Franklin and Marshall College, Lancaster, PA 17604-3003 (United States)
6. Max-Planck-Institut für Radioastronomie, D-53121 Bonn (Germany)
7. ASTRON, Netherlands Institute for Radio Astronomy, Postbus 2, 7990-AA Dwingeloo (Netherlands)
8. Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506 (United States)
9. Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 (Canada)
10. Physics Department, University of Wisconsin-Milwaukee, Milwaukee, WI 53211 (United States)
11. Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 (United States)

We present the discovery of five millisecond pulsars (MSPs) from the PALFA Galactic plane survey using Arecibo. Four of these (PSRs J0557+1551, J1850+0244, J1902+0300, and J1943+2210) are binary pulsars whose companions are likely white dwarfs, and one (PSR J1905+0453) is isolated. Phase-coherent timing solutions, ranging from ∼1 to ∼3 yr in length, and based on observations from the Jodrell Bank and Arecibo telescopes, provide precise determinations of spin, orbital, and astrometric parameters. All five pulsars have large dispersion measures (>100 pc cm{sup –3}, within the top 20% of all known Galactic field MSPs) and are faint (1.4 GHz flux density ≲0.1 mJy, within the faintest 5% of all known Galactic field MSPs), illustrating PALFA's ability to find increasingly faint, distant MSPs in the Galactic plane. In particular, PSR J1850+0244 has a dispersion measure of 540 pc cm{sup –3}, the highest of all known MSPs. Such distant, faint MSPs are important input for accurately modeling the total Galactic MSP population.

• OSTI ID: 22522103
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 800; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BINARY STARS
FLUX DENSITY
GHZ RANGE
MILKY WAY
PULSARS
SPIN
TELESCOPES
WHITE DWARF STARS