{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"41709b0cbd4e1c25d4e0f087a0557242a457b4f9b06dc21d9c10f46c884b6d24","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["c9afa47442d877a07e3068c4cdf423a748b2f71fa9d516f7d0e6b95d5af9b248","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"18695b15f10b6657ef1b8f49dfc3a80170d8d28c5b27f986f01e22e29f6eb03b","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"astro.circumgalactic-medium.missing-galactic-baryons","kind":"well-posed","literature_status":"partially-resolved","n":"2","parents":[],"plain":"A galaxy like ours should contain about one sixth of its total mass as ordinary matter, but stars and disk gas account for only a fraction of that. The rest may be in hot halo gas or may have been blown out of the halo.","posed_since":"","precise":"For halos of $M_h \\sim 10^{12}\\,M_{\\mathrm{sun}}$, stars and interstellar gas account for roughly 20 to 30 percent of $f_b M_h$ ($f_b \\sim 0.16$, the cosmic baryon fraction). Determine the mass in each phase of halo gas (cool $10^{4}\\,\\mathrm{K}$, warm $10^{5}\\,\\mathrm{K}$, hot above $10^{6}\\,\\mathrm{K}$) inside the virial radius and the mass ejected beyond it.","problem_ref":"c9afa47442d877a07e3068c4cdf423a748b2f71fa9d516f7d0e6b95d5af9b248","references":"","settled_by":"Combined X-ray emission, Sunyaev-Zeldovich and fast-radio-burst dispersion measurements of the gas profile around a stacked sample of Milky Way-mass galaxies out to and beyond the virial radius.","status_note":"eROSITA stacking detects extended hot gas around Milky Way-mass galaxies, but its share of the budget remains debated (Zhang et al., A&A, 2026).","title":"Where are the missing baryons of Milky Way-mass galaxies?","topic_ref":null},"content_withheld":"false","files":[],"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"988ca49d3fca0abbdeef79f5013718051cb25faaa306ffe2bef097e76e97c140","schema":"pubphys.attested/1"},"id_token":null,"id_token_withheld":"false","envelope":{"attested_hash":"8bfea1772dfdc5844a1e060620637e323a929e7afb78801921e9bd2851d70665","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"8YLb7dPzoK1W55o_f07PsBFT8uuUCOYcn2E7xNcn9NINvQutjJQ1kBkjANmb7FNXHXp8xH82uS8sida4qjUKCw"},"schema":"pubphys.envelope/1"},"ots":{"attested":["AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC_ieLohOiSlAEIi_6hdy39xYRKHgYGIGN-MjqSnnr7eIAZIem9KFHXBmXxIIvxd9LVgJiRA0vM9CqyO-JqQ6abK9nL_lj4y5yyIa_8CPAgqfy7YlxJHvtj0J5RaKlLHsM5rP19B69_ioo-FtPgG70I8CDTUpceXtvxUIyqIS_4_jMxyMktf2lgjs8HSBMd5YABZgjxIDlLPzRi0vK0kaHYHxQymLEjcI2v5Or29zH_ZolwkTKqCPEg1tWmqsXUYGLo-Knm8eHU7QN2_kPBKtEg5f9ZVRkYPOcI8CDOV4YGvVKQcr5SVYQhN6-1darSnAHAcn4ZOW6OZpYOKQjxIA5kBNR5h0M8BudAO1brAu7MVCtAo_K9XbO2UJAGA2EBCPAgjT3MA7bJPGfxQTsMF_oLjJPZiODpJPEpJYYPFTY6EggI8SA2AWlsr6OtzkJEYtRd4vkA1WvJDOR5VTRovvQJKclq5QjxICknnLxa8xs8qmAdhtb0NnANbtwYyrlRTgqcMVLLl8ogCPEgHd9u6OIGCvUV12A1B1xdiOprSJ-4w0cqwfe7CzVX5HsI8CDQo_sIWZiWXaTGRSQBLmU-lHJKskYKqsjO1r02DhB8LAj_8Ajn9YmozHwo9QjwEJ46aM9ZDv3TdtqV3ZbRsNgI8SBOF8pILGf1kodr5MKmQs6Cd93joraGn3g6UPt_-kewPwjwIOG-gmM7bd_eR4AiDMNfluS3xvr7vicLR-sCBr5qtG2cCPAgrVNFrCoeQcCxhlmnE0BzHgR8HQpZAlfqzDDFzfWb8GUI8QRq0WWT8AjZJ2cF_c7k8ACD3-MNLvkMjiwraHR0cHM6Ly9ib2IuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZ_AI9ZMS1zxd7IEI8BDd00WgJZ0RncsC1Fyai_4aCPEgvxMFrnu7F05IW5INiraQ3OVEYMjNx6JfBxw1Q4jPLi4I8QRq0WWS8Ag2zxPAtI5JsP8Ag9_jDS75DI4uLWh0dHBzOi8vYWxpY2UuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZwjxIHAnv4KFFf4uiYEFJvLxiMxSyz8VowJP4roTfDD9h7bICPAgj5tgvbNF7mxSP4jGGE66ezUFRLnI4g1VTkvuV4VtCPAI8CCxlc1HuKORuHgn7DYIYcDhc4oo99OkTWBEvddBypoa7AjwIFcjjaF8kDNDYCZGaNISlRjvX-I7in-QNwsr4JYQbFJvCPAgnl0k4gs7LuY5i1umiHO-J7My3uBThLJUWQoY9LdVSrQI8SA6-Ft11_K_GqMNWYhkVsVqCFvXSYbp4S8JoLsLBnUzvgjxIBC8_mAE7JBP35SNxDBcG7joLJwURpMxdV2vSO64_jEOCPEge04Coj1xSi7CE8UwqiBGNhPyZ5QdD_YZwn-heSdObU4I8SBgdDSgr3VUx1j8m_pK7-OzMwwFgXeLy43ujffCv-hf5AjwIMl-PnAt4xjoBEVU4-nkyN0NKRa9AvX4kEMfllFyIJS9CPFZAQAAAAHz4rV-uwQFg02bVnEMUFgpIdGKjM4tWuID1kTVnrjisAAAAAAA_v___wJURAIAAAAAABYAFBFys2oc0-U-bYrC3VulGLzND5fbAAAAAAAAAAAiaiDwBHLTDgAICPEgMJIBYi46xOIuFDwzJ9nOx14ngW5HbglUf65ORpkoIYcICPAgHgGWEGCDHWgscwT92NOoJ7s-ezbPkyiWr2RnYZDC_dwICPAgtffMyyLu-MscJsDc0dzwGspwSrrmvVAnMNgsgWhHClgICPAgMUl1OfBDUwhp5VZjHwVA0nuz1F5HZTUJCHAnM1L1F3MICPAgStK7UWpnrUueV5EaE7uE0y6BLMp6EANmrbhrTqEBZu8ICPAg5LVW7IHtUL5mNOvPx1hOTfLMmqlQ7t9EFW-KDtrISIQICPAgABgXZ6upFU8qiDQKFtQFpqkjKwl0PsxM4JUjVLlDKbkICPAgEwb96FiOhjlbwI8GFZQ4a5GXwxs4bUdqVOMKrtBWV30ICPEgqBg-wp0c8CAPV9k6J7wIa9_GtQfpWmhpE1zqFZyi2pQICPAg2pZLTVPGJbriiz0UhMytYDVYAXOgQnWDcrMOewK9O8cICPEgxm3QwzbvT4siJzubQGnST67bWv-exYwSPP1KDi7CaUwICPEgm6udUudfjUaM0gUFTylKGDMypj7ptMTG0zmxd_T5yTcICPAgMpOInkjFCVp1pOZhfZnyPAl8hdWGmHzQcrGLgLwSKLgICAAFiJYNc9cZAQPzpjs"],"envelope":["AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC_ieLohOiSlAEIb4vjc1IXuzEvIXFHiX5yD_7-518QflIXHAP-WPpXDB3xIG-BqTl73VAISkiQ5jEimLY4_DhjWmV2bPFln74C61NnCPEgqzai5vwIsspRWuhemV7dE29-1oprEOEzXIeP9SfkSKwI8SAcKsDsImqZoGMM3NC8_yyGnWIGSwFuoRhSBmei0xauNQjwIE2G6P86XnNEEyCVJygc8bZPr1RJyU2CGr7RyjTSMZpkCPAgLx4dkEVduj_NzHfE6DWsHOyuwPWYiHWd9Fk4xB_-EWQI8CA0jylEoQ9lj-IHnYppcPifuFpqhtrw6PvbyORWBGlOeQjxIMuYGb9HTwrEORPUiiEUtDprOei6qtfzU-FVLuE2Gni_CPEgV483a5w_VdTK7my82rqJCPIXOvGhZNeRkwqfWifoP4MI8SBcP9hQb3hxUiLf8dFx-DuqZHA2xkmG-c_qCFt8QfQHCAjwIOv_x0B6HyZ6WMHKeIf_d_EUIvwPGdZeVY-hXN3RLDM5CPEgHd9u6OIGCvUV12A1B1xdiOprSJ-4w0cqwfe7CzVX5HsI8CDQo_sIWZiWXaTGRSQBLmU-lHJKskYKqsjO1r02DhB8LAj_8Ajn9YmozHwo9QjwEJ46aM9ZDv3TdtqV3ZbRsNgI8SBOF8pILGf1kodr5MKmQs6Cd93joraGn3g6UPt_-kewPwjwIOG-gmM7bd_eR4AiDMNfluS3xvr7vicLR-sCBr5qtG2cCPAgrVNFrCoeQcCxhlmnE0BzHgR8HQpZAlfqzDDFzfWb8GUI8QRq0WWT8AjZJ2cF_c7k8ACD3-MNLvkMjiwraHR0cHM6Ly9ib2IuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZ_AI9ZMS1zxd7IEI8BDd00WgJZ0RncsC1Fyai_4aCPEgvxMFrnu7F05IW5INiraQ3OVEYMjNx6JfBxw1Q4jPLi4I8QRq0WWS8Ag2zxPAtI5JsP8Ag9_jDS75DI4uLWh0dHBzOi8vYWxpY2UuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZwjxIHAnv4KFFf4uiYEFJvLxiMxSyz8VowJP4roTfDD9h7bICPAgj5tgvbNF7mxSP4jGGE66ezUFRLnI4g1VTkvuV4VtCPAI8CCxlc1HuKORuHgn7DYIYcDhc4oo99OkTWBEvddBypoa7AjwIFcjjaF8kDNDYCZGaNISlRjvX-I7in-QNwsr4JYQbFJvCPAgnl0k4gs7LuY5i1umiHO-J7My3uBThLJUWQoY9LdVSrQI8SA6-Ft11_K_GqMNWYhkVsVqCFvXSYbp4S8JoLsLBnUzvgjxIBC8_mAE7JBP35SNxDBcG7joLJwURpMxdV2vSO64_jEOCPEge04Coj1xSi7CE8UwqiBGNhPyZ5QdD_YZwn-heSdObU4I8SBgdDSgr3VUx1j8m_pK7-OzMwwFgXeLy43ujffCv-hf5AjwIMl-PnAt4xjoBEVU4-nkyN0NKRa9AvX4kEMfllFyIJS9CPFZAQAAAAHz4rV-uwQFg02bVnEMUFgpIdGKjM4tWuID1kTVnrjisAAAAAAA_v___wJURAIAAAAAABYAFBFys2oc0-U-bYrC3VulGLzND5fbAAAAAAAAAAAiaiDwBHLTDgAICPEgMJIBYi46xOIuFDwzJ9nOx14ngW5HbglUf65ORpkoIYcICPAgHgGWEGCDHWgscwT92NOoJ7s-ezbPkyiWr2RnYZDC_dwICPAgtffMyyLu-MscJsDc0dzwGspwSrrmvVAnMNgsgWhHClgICPAgMUl1OfBDUwhp5VZjHwVA0nuz1F5HZTUJCHAnM1L1F3MICPAgStK7UWpnrUueV5EaE7uE0y6BLMp6EANmrbhrTqEBZu8ICPAg5LVW7IHtUL5mNOvPx1hOTfLMmqlQ7t9EFW-KDtrISIQICPAgABgXZ6upFU8qiDQKFtQFpqkjKwl0PsxM4JUjVLlDKbkICPAgEwb96FiOhjlbwI8GFZQ4a5GXwxs4bUdqVOMKrtBWV30ICPEgqBg-wp0c8CAPV9k6J7wIa9_GtQfpWmhpE1zqFZyi2pQICPAg2pZLTVPGJbriiz0UhMytYDVYAXOgQnWDcrMOewK9O8cICPEgxm3QwzbvT4siJzubQGnST67bWv-exYwSPP1KDi7CaUwICPEgm6udUudfjUaM0gUFTylKGDMypj7ptMTG0zmxd_T5yTcICPAgMpOInkjFCVp1pOZhfZnyPAl8hdWGmHzQcrGLgLwSKLgICAAFiJYNc9cZAQPzpjs"]},"log":{"leaf_index":"2310","tree_size":"3804","proof":["1fe6c4bee7ae2ac727512c643990083efddf73e57fbcef245e6326f3baf00a3b","2e7b73980a89c454c61afe379548a1786a5ec7622a38fd27d5eac01890ccdeff","25fefcb2f847d05988f5554bde6f60bd9400b6cc7c7e6a1fe462ddfbf0cf41f3","d019a9f444685d819e27586ca6f782c764faf114b482e22ee6961b1918bd3149","d7dad6c7d4c14a298793c9f77183d8f7257af54b6f87bda29ace0bc387b18335","e09d75cff20d1de31b67dd1a22b2d67fcb4ad05dc5c26ca84ca22f8e5edc939e","977eb21344b8ed566079e783be2c57fef659104f825596ed3f3836b243b32eed","0e333b0bb1d5b3a0837c7007c90874beee2fb89206b164572bfa2f0648b1cb1e","ad2bf8922b230304eb5887f66a1631d0d013048aef3d1e5c2bce55da65e76cef","453fe2db8b5276d732edac85634e8be036b4709a91a2584f32a4b9edcc8ca9de","325287f5a43e4f3ad4072ec4bd53d43c50c1393021a056122e9cb0fad83b868f","3c578dccc15502c5f3efe228cadc99fee76ab536ed01f66b14d316fdcc157429"],"checkpoint":"pubphys.com/log/v1\n3804\nAK6t4qgu96+M9wScTrIlsJ10d/zhKVEtYguyM3aeJvo=\n\n— pubphys.com/log/v1 JFPwIPP8EtoxgcsQg7V7CwIdL4UKPqJtpv+eB8sFNJjyQHIdyA1VabmBsPyLqq2bLxJPn57rA6fQi8y0QDDjRXHvlQg=\n","promise":"pubphys.com/log/v1 promise\n464569e052c4e15edf8fa31818884f29d70331c3fa288b2b74afd97c18949009\n2310\n2026-10-15T23:43:57Z\n2026-10-16T01:43:57Z\n\n— pubphys.com/log/v1 JFPwIMHHlaHJ3nVIhFYIJfqTurXvwZ5+Qw22bR6sot1CucItn8ZzAdAkKFCyVPcUVc/g7i6Weblhw1a5NIDXEiflTQg=\n"},"orcid_key_evidence":[],"attesting":null}