Please Note:

The Open Access Repository will be moving to a new authentication system on the 1st of November.

From this date onwards, account holders will be required to login using their University of Tasmania credentials.
If your current repository username differs from your University username, please email so we can update these details on your behalf.

Due to the change, there will be a short outage of the repository from 9am on the morning of the 1st of November

Open Access Repository

Correlation Between X-Ray Light-Curve Shape and Radio Arrival Time in the Vela Pulsar


Downloads per month over past year

Lommen, AN and Donovan, J and Gwinn, C and Arzoumanian, Z and Harding, A and Strickman, M and Dodson, R and McCulloch, PM and Moffett, D (2007) Correlation Between X-Ray Light-Curve Shape and Radio Arrival Time in the Vela Pulsar. The Astrophysical Journal, 657 (1). pp. 436-440. ISSN 0004-637X

[img] PDF
3745.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.


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 Vela’s X-ray emission and
radio arrival times on a pulse-by-pulse basis. At a confidence level of 99.8% we have 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 second X-ray peak during radio pulses that arrive later. Our results suggest that the mechanism producing
the radio pulses is intimately connected to the mechanism producing X-rays. Current models using resonant absorption
of radio emission in the outer magnetosphere as a cause of the X-ray emission are explored as a possible explanation
for the correlation.

Item Type: Article
Journal or Publication Title: The Astrophysical Journal
Publisher: University of Chicago Press
Page Range: pp. 436-440
ISSN: 0004-637X
Identification Number - DOI: 10.1086/510797
Date Deposited: 07 Apr 2008 14:04
Last Modified: 18 Nov 2014 03:33
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page