A search for the radio counterpart of the unidentified γ-ray source 3EG J1410-6147

M. Doherty, S. Johnston, A. J. Greeb, Mallory Roberts, R. W. Romani, B. M. Gaensler, F. Crawford

Research output: Contribution to journalArticle

Abstract

We have made radio continuum, H I and X-ray observations in the direction of the unidentified EGRET source 3EG J1410-6147, using the Australia Telescope Compact Array and the Chandra X-ray Observatory. The observations encompass the supernova remnant (SNR) G312.4-0.4 and the two young pulsars PSRs J1412-6145 and J1413-6141. We derive a lower distance limit of 6 kpc to the SNR, although interpretation of positive velocity features in the HI spectrum may imply that the SNR is more distant than 14 kpc. PSR J1412-6145, with an age of 50 kyr, is the pulsar most probably associated with SNR G312.40.4. X-rays are not detected from either pulsar and diffuse X-ray emission near the bright western edge of the SNR is weak. Although there is circumstantial evidence that this western region is a pulsar wind nebula (PWN), the embedded pulsar PSR J1412-6145 is apparently not sufficiently powerful to explain the radio enhancement. The origin of the electron acceleration in this region and of the γ-rays remains unidentified, unless the distance to PSR J1413-6141 is at least a factor of 3 lower than its dispersion measure distance.

Original languageEnglish (US)
Pages (from-to)1048-1056
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Volume339
Issue number4
DOIs
StatePublished - Mar 11 2003

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supernova remnants
pulsars
rays
radio
x rays
electron acceleration
nebulae
observatory
observatories
electron
telescopes
continuums
augmentation

Keywords

  • Pulsars: Individual: J1412-6145
  • Pulsars: Individual: J1413-6141

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

A search for the radio counterpart of the unidentified γ-ray source 3EG J1410-6147. / Doherty, M.; Johnston, S.; Greeb, A. J.; Roberts, Mallory; Romani, R. W.; Gaensler, B. M.; Crawford, F.

In: Monthly Notices of the Royal Astronomical Society, Vol. 339, No. 4, 11.03.2003, p. 1048-1056.

Research output: Contribution to journalArticle

Doherty, M. ; Johnston, S. ; Greeb, A. J. ; Roberts, Mallory ; Romani, R. W. ; Gaensler, B. M. ; Crawford, F. / A search for the radio counterpart of the unidentified γ-ray source 3EG J1410-6147. In: Monthly Notices of the Royal Astronomical Society. 2003 ; Vol. 339, No. 4. pp. 1048-1056.
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