{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"3a0cd68090aa3447d20cdd7c80d8034c27f0d7d57c94a6ffbf7ca929f0a6e965","created":"2026-10-03T07:17:50Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"cac2431d2615ae5572d350982e94472a8857947a8fdcc270ad7db62d277d4e82","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"astro.galactic-gamma-ray-anomalies","field":"astro","n":"1","review_cite":"T. Siegert, The positron puzzle, Astrophysics and Space Science, 2023","review_link":"https://doi.org/10.1007/s10509-023-04184-4","review_verified":"true","summary":"The center of our galaxy emits more gamma rays at a few billion electron volts than known sources explain, and a strong line from electrons annihilating with positrons (their antiparticles). Neither signal has an agreed source.","title":"Galactic center GeV excess and 511 keV line","topic_ref":null,"why":"The GeV excess is a leading candidate signal of dark-matter annihilation, and the 511 keV line measures how antimatter is made and spread in the galaxy."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"2f78327303a97433a098b26582bcf23a29959fff36be6fdf51ec3c67a48452b7","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"7ab0cb62f698f19441e10bed8c826b984a054f3e7b72bfa983934c80675c3bf1","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"9VWUUBnb9DzDfNgxs0qq7DRdW_eRTvzWRDaT8GL5eCv1FQHHTnnU6gkT2eWBKqpDfrUnWw12unMjfM_Z9cczAw"},"schema":"pubphys.envelope/1"},"record_hash":"2f78327303a97433a098b26582bcf23a29959fff36be6fdf51ec3c67a48452b7","leaf_index":38}