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

journal contribution
posted on 2023-05-16, 10:27 authored by Gwinn, CR, Ojeda, MJ, Britton, MC, Reynolds, JE, Jauncey, DL, King, EA, Peter McCullochPeter McCulloch, James LovellJames Lovell, Flanagan, CS, Smits, DP, Preston, RA, Jones, DL
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.

History

Publication title

The Astrophysical Journal

Volume

483

Pagination

L53-L56

ISSN

0004-637X

Department/School

School of Natural Sciences

Publisher

The Americal Astronomical Society

Place of publication

Chicago, USA

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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