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19 April 2024 |
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Correlations between pulsed X-ray flux and radio arrival time in the Vela pulsar | | A. N. Lommen
; J. Donovan
; C. Gwinn
; Z. Arzoumanian
; A. Harding
; M. Strickman
; R. Dodson
; P. McCulloch
; D. Moffett
; | | Date: |
4 Jan 2007 | | Abstract: | We report the results of simultaneous observations of the Vela pulsar in X-rays and radio from the RXTE satellite and the Mount Pleasant Radio Observatory in Tasmania. We sought correlations between the Vela’s X-ray and radio flux densities and radio arrival times on a pulse by pulse basis. We found significantly higher flux density in Vela’s main X-ray peak during radio pulses that arrived early. This excess flux shifts to the ’trough’ following the 2nd X-ray peak during radio pulses that arrive later. We suggest that the mechanism producing the radio pulses is intimately connected to the mechanism producing X-rays. Current models using resonant absorption in the outer magnetosphere as a cause of the radio emission, and less directly of the X-ray emission, are explored as a possible explanation for the correlation. | | Source: | arXiv, astro-ph/0701103 | | Services: | Forum | Review | PDF | Favorites | |
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