SIMBAD references

2025ApJ...980..160G - Astrophys. J., 980, 160 (2025/February-3)

Detection of the Extended γ-Ray Emission around TeV Source 1LHAASO J0249+6022 with Fermi-LAT.

GONG Y., ZHOU L., XIA Q., CHANG S., FANG J. and ZHANG L.

Abstract (from CDS):

1LHAASO J0249+6022 is an extended very-high-energy γ-ray source discovered by the Large High-Altitude Air Shower Observatory. Based on nearly 16.1 yr of data from the Fermi Large Area Telescope, we report the probable γ-ray emission from 1LHAASO J0249+6022 in the 0.03-1 TeV energy range. The results show that its γ-ray spectrum can be well fitted by a single power law with an index of 1.54 ± 0.17, and integral photon flux is (4.28 ± 1.03) × 10–11 photons cm–2 s–1. We also considered theoretically whether the nonthermal emission could originate from a pulsar wind nebula (PWN) scenario. Assuming that the particles injected into the nebula have a power-law distribution, the resulting spectrum from the inverse Compton scattering is consistent with the detected GeV and TeV γ-ray fluxes. Our study shows that the PWN scenario is reasonable for 1LHAASO J0249+6022.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gamma-ray astronomy - Spectral energy distribution - Pulsar wind nebulae - Astronomy data analysis

Simbad objects: 17

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