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29 March 2024
 
  » arxiv » astro-ph/0404149

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Green Bank Telescope Measurement of the Systemic Velocity of the Double Pulsar Binary J0737-3039 and Implications for its Formation
S. M. Ransom ; V. M. Kaspi ; R. Ramachandran ; P. Demorest ; D. C. Backer ; E. D. Pfahl ; F. D. Ghigo ; D. L. Kaplan ;
Date 7 Apr 2004
Journal Astrophys.J. 609 (2004) L71-L74
Subject astro-ph
AffiliationMcGill/MIT), V. M. Kaspi (McGill/MIT), R. Ramachandran (Berkeley), P. Demorest (Berkeley), D. C. Backer (Berkeley), E. D. Pfahl (CfA), F. D. Ghigo (NRAO), and D. L. Kaplan (Caltech
AbstractWe report on the measurement at 820- and 1400-MHz of orbital modulation of the diffractive scintillation timescale from pulsar A in the double-pulsar system J0737-3039 using the Green Bank Telescope. Fits to this modulation determine the systemic velocity in the plane of the sky to be V_iss ~ 140.9 +/- 6.2 km/s. The parallel and perpendicular components of this velocity with respect to the line of nodes of the pulsar’s orbit are V_plane ~ 96.0 +/- 3.7 km/s and V_perp ~ 103.1 +/- 7.7 km/s respectively. The large V_perp implies that pulsar B was born with a kick speed of >~ 100 km/s. Future VLBA determination of the angular proper motion in conjunction with improved V_iss measurements should provide a precise distance to the system. Using high-precision timing data and the V_iss model, we estimate a best-fit orbital inclination of i = 88.7 +/- 0.9 deg.
Source arXiv, astro-ph/0404149
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