Speaker
Description
In this talk, we report the discovery of an extended very-high-energy (VHE) gamma-ray source around the location of the middle-aged (360 kyr) pulsar J1846+0919 with LHAASO. The source is detected with a significance of 7 σ for E>10 TeV assuming a Gaussian template. The best-fit position is (RA, Dec) = 281°.90±0°.21, 9°.44±0°.17, and the extension is 0°.88±0°.17. The spectrum can be described by a power-law with an index of 3.18±0.12. Given the absence of SNR couterparts and very similar age (360 kyr), spin-down luminosity (3.4e+34 ergs/s) and period (0.226 s) to the geminga pulsar (age = 340 kyr, Edot = 3.26e+34 ergs/s, P0 = 0.237 s), this source can be a promising halo candidate. Although the properties of the two PSRs are very similar, the physical size of this source is about twice that of geminga TeV halo.
| Collaboration(s) | LHAASO |
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