Timing and scintillations of the millisecond pulsar 1937 + 214

Journal Article · Mon Jan 01 00:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168310· OSTI ID:6997548

Cordes, J M; Wolszczan, A; Dewey, R J; Blaskiewicz, M; Stinebring, D R ^[1]

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1. Cornell Univ., Ithaca, NY (USA) Princeton Univ., NJ (USA)

Pulse shapes, arrival times, and interstellar scintillations of the 1.56 ms PSR 1937 + 214 pulsar are analyzed at frequencies from 0.32 to 1.4 GHz using data obtained from April 1983 to December 1985. The narrow pulse and small period of the pulsar yield arrival times that are much more precise than those of most other pulsars. Arrival time precision for the pulsar is limited at low frequencies by distortions of the pulse shape imposed by interstellar scintillations. Arrival times at all radio frequencies are affected by variations in dispersion measure and, possibly, additional variations related to variations in angle of arrival. Uncertainties in how the pulse shape varies with frequency influence estimates of dispersion measures. The interstellar scintillation and pulse broadening of the pulsar strongly constrain the spatial power spectrum of electron density variations in the ISM. 70 refs.

• OSTI ID: 6997548
• Journal Information: Astrophysical Journal; (USA), Vol. 349; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
PULSARS
PULSES
ELECTRON DENSITY
INTERSTELLAR SPACE
OSCILLATIONS
RADIOWAVE RADIATION
SCINTILLATIONS
SPECTRA
STELLAR RADIATION
TIME MEASUREMENT
VARIATIONS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
RADIATIONS
SPACE
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources