A GeV PWN Candidate in the PSR J1135--6055/G293.8+0.6 Field
Abstract
We present a \textit{Fermi} Large Area Telescope (LAT) study of PSR~J1135--6055 and the composite supernova remnant (SNR) G293.8+0.6. MeerKAT radio observations reveal a bright central plerion within the faint SNR shell, while Chandra observations detect a compact nebula around the pulsar. Together, these observations establish the presence of a PWN within G293.8+0.6. Our analysis of the 20~GeV--1~TeV LAT data yields a point-like excess with TS=26.30 and photon index Γ=1.63±0.33. Its best-fit position is consistent with the pulsar within the 95\% statistical localization region, and neither the uniform-disk nor Gaussian model is favored, providing no evidence for significant extension. A one-zone leptonic model, together with an independent jet component, reproduces the multiwavelength observations. In this model, the GeV photons are produced mainly by inverse-Compton scattering from relativistic electrons and positrons. Given its positional agreement with the pulsar/PWN and broadband interpretation, we regard the LAT point source as a GeV PWN candidate.
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BibTeX
@misc{zhou2026candidate,
title = {{A GeV PWN Candidate in the PSR J1135--6055/G293.8+0.6 Field}},
author = {Liancheng Zhou and Yunlu Gong and Jun Fang and Li Zhang},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.03266},
eprint = {2611.03266},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.03266},
}
RIS
TY - UNPB
TI - A GeV PWN Candidate in the PSR J1135--6055/G293.8+0.6 Field
AU - Liancheng Zhou
AU - Yunlu Gong
AU - Jun Fang
AU - Li Zhang
PY - 2026
DA - 2026/11/02
PB - arXiv
DO - 10.48550/arxiv.2611.03266
UR - https://arxiv.org/abs/2611.03266
AB - We present a \textit{Fermi} Large Area Telescope (LAT) study of PSR~J1135--6055 and the composite supernova remnant (SNR) G293.8+0.6. MeerKAT radio observations reveal a bright central plerion within the faint SNR shell, while Chandra observations detect a compact nebula around the pulsar. Together, these observations establish the presence of a PWN within G293.8+0.6. Our analysis of the 20~GeV--1~TeV LAT data yields a point-like excess with TS=26.30 and photon index Γ=1.63±0.33. Its best-fit position is consistent with the pulsar within the 95\% statistical localization region, and neither the uniform-disk nor Gaussian model is favored, providing no evidence for significant extension. A one-zone leptonic model, together with an independent jet component, reproduces the multiwavelength observations. In this model, the GeV photons are produced mainly by inverse-Compton scattering from relativistic electrons and positrons. Given its positional agreement with the pulsar/PWN and broadband interpretation, we regard the LAT point source as a GeV PWN candidate.
ER -