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A search for the radio counterpart of the unidentified gamma-ray source 3EG J1410-6147 | | M. Doherty
; S. Johnston
; A. J. Green
; M. S. E. Roberts
; R. W. Romani
; B. M. Gaensler
; F. Crawford
; | | Date: |
12 Nov 2002 | | Journal: | Mon.Not.Roy.Astron.Soc. 339 (2003) 1048 | | Subject: | astro-ph | | Abstract: | We have made radio continuum, HI 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 the SNR is more distant than 14 kpc. PSR J1412-6145, with an age of 50 kyr, is the pulsar most likely associated with SNR G312.4-0.4. 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 gamma-rays remain unidentified, unless the distance to PSR J1413-6141 is at least a factor of 3 lower than its dispersion measure distance. | | Source: | arXiv, astro-ph/0211246 | | Services: | Forum | Review | PDF | Favorites | |
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