Abstract
view Abstract Citations (17) References (16) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Secular Variations of the Integrated Pulse Profile of, and Torque on, PSR 2217+47: Precession of the Neutron Star? Suleymanova, Svetlana A. ; Shitov, Yurii P. Abstract A new component of the integrated pulse profile of PSR 2217+47 has been found at 102 MHz during observations at the Pushchino Observatory in 1991. Subsequent examination of archival observations going back to 1978 has revealed that this weak component was not visible above the instrumental noise level until 1983. During the intervening decade its relative intensity changed quasi-periodically between 1% and 3% with a timescale of 6-8 yr. Moreover, we found that this new 'postcursor' component 'drifted' monotonically toward the main pulse at a rate of 2.8 deg/yr. Timing measurements show that the first derivative of the pulsar period also suffered rather significant change, so that the second derivative is equal to -(6.59 +/- 0.57) x 10-27 sec/sq sec over the last decade. Precession of the pulsar spin axis is suggested as the common cause for the observed variations of both pulse shape and arrival times. Publication: The Astrophysical Journal Pub Date: February 1994 DOI: 10.1086/187201 Bibcode: 1994ApJ...422L..17S Keywords: Integral Transformations; Pulsar Magnetospheres; Pulsars; Pulse Amplitude; Pulse Modulation; Faraday Effect; Integrals; Radio Bursts; Unsteady Flow; Astrophysics; STARS: PULSARS: GENERAL; STARS: PULSARS: INDIVIDUAL ALPHANUMERIC: PSR 2217; 47 full text sources ADS | data products SIMBAD (3)
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