eCite Digital Repository

Size of the Vela Pulsar's Radio Emission Region: 500 Kilometers


Gwinn, CR and Ojeda, MJ and Britton, MC and Reynolds, JE and Jauncey, DL and King, EA and McCulloch, PM and Lovell, JEJ and Flanagan, CS and Smits, DP and Preston, RA and Jones, DL, Size of the Vela Pulsar's Radio Emission Region: 500 Kilometers, The Astrophysical Journal, 483, (1) pp. L53-L56. ISSN 0004-637X (1997) [Refereed Article]

DOI: doi:10.1086/310734


We use interstellar scattering of the Vela pulsar to determine the size of its emission region. We find that radio-wave scattering in the Vela supernova remnant broadens the source by 3.3 ± 0.2 mas × 2.0 ± 0.1 mas, with the major axis at a position angle of 92° ± 10°. From the modulation of the pulsar's scintillation, we infer a size of 500 km for the pulsar's emission region, with an estimated uncertainty of about a factor of 2, including systematic errors. We suggest that radio-wave refraction within the pulsar's magnetosphere may plausibly explain this size. © 1997. The American Astronomical Society. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:King, EA (Dr King)
UTAS Author:McCulloch, PM (Professor Peter McCulloch)
UTAS Author:Lovell, JEJ (Dr Jim Lovell)
ID Code:10171
Year Published:1997
Web of Science® Times Cited:23
Deposited By:Physics
Deposited On:1997-08-01
Last Modified:2011-08-11

Repository Staff Only: item control page