目录Contents
工作台：M31 的星系周介质（New-ANGELS III）Workbench: the circumgalactic medium of M31 (New-ANGELS III)
评审更正（2026-10-14 08:40 UTC）：本页写成后，交叉检验 E014 已完成。外 NW 四场偏亮不是大尺度银河系纬度结构：RASS R45 的外四/其余十比值为 0.91 ± 0.12（XMM 为 1.28），M31 周围 1–3° 环带的纬度斜率为 −0.6 ± 1.2 %/deg（XMM 为 +15.6 %/deg）。OMNI 太阳风在这四个观测时段均未超过 4e8 cm⁻² s⁻¹，所以也不是 OMNI 能追踪的 SWCX。软质子/QPB 比在外四场平均高约 3 倍，但与亮度的相关不显著（rho = 0.35，p = 0.22）。决定 D49：在专门检验（放开软质子谱形重拟合、Virgo 上更严格的 flare 过滤重处理）之前，按约 0.25 的未解释场间系统误差处理。因此 M31 上限的默认版本改为「MW 常数」（0.05–0.12 @20 kpc）。来源：cognition-os/experiments/E014；cognition-os/04_DECISION_LOG.md D49。
Review correction (2026-10-14 08:40 UTC): after this page was written, cross-check E014 finished. The bright outer-NW four are not large-scale Milky Way latitude structure: the RASS R45 outer-four/other-ten ratio is 0.91 ± 0.12 (XMM: 1.28), and the latitude slope in the 1–3° annulus around M31 is −0.6 ± 1.2 %/deg (XMM: +15.6 %/deg). The OMNI solar wind stays below 4e8 cm⁻² s⁻¹ in all four windows, so this is also not OMNI-traced SWCX. The soft-proton/QPB ratio is about 3x higher in the outer four on average, but its correlation with brightness is not significant (rho = 0.35, p = 0.22). Decision D49: until dedicated tests (refit with a free soft-proton shape; stricter flare filtering reprocessed on Virgo), the excess is treated as an unexplained field-to-field systematic of about 0.25. The default M31 limit is therefore the "MW constant" version (0.05–0.12 at 20 kpc). Source: cognition-os/experiments/E014; cognition-os/04_DECISION_LOG.md D49.
这是什么项目？What is this project?
M31（仙女座星系）是离我们最近的大型旋涡星系。宇宙学认为星系的大部分普通物质（重子）不在星系内部，而在星系周围几十万光年的星系周介质（CGM）——百万度的稀薄气体。本项目用 XMM-Newton 的 22 个指向（proposal 080073，PI J. Li）在 M31 内晕（投影半径 10.5–30.8 kpc）逐视线测量弥漫软 X 射线发射，把「银河系前景 + M31 内晕」的总和（记号 CGMsum）测准，再用空间形状限制其中有多少属于 M31。测量已冻结（D48，2026-10-14）：14 个主样本场的 CGMsum 吸收流量为 0.965 ± 0.044（单位 10⁻¹⁵ erg cm⁻² s⁻¹ arcmin⁻²），共温 kT = 0.17531 ± 0.00436 keV。
M31 (Andromeda) is the nearest large spiral galaxy. Cosmology says most of a galaxy's ordinary matter (baryons) is not inside the galaxy but in the circumgalactic medium (CGM), million-degree thin gas around it. Using 22 XMM-Newton pointings (proposal 080073, PI J. Li) toward the M31 inner halo (projected radii 10.5–30.8 kpc), this project measures the diffuse soft X-ray emission sightline by sightline, pins down the sum "Milky Way foreground + M31 inner halo" (notation CGMsum), and then limits how much belongs to M31 from its spatial shape. The measurement is frozen (D48, 2026-10-14): the 14 primary fields give CGMsum absorbed flux 0.965 ± 0.044 (units 10⁻¹⁵ erg cm⁻² s⁻¹ arcmin⁻²), common kT = 0.17531 ± 0.00436 keV.
来源：cognition-os/00_AI_BRIEFING.md（2026-10-14 D48 块）；cognition-os/04_DECISION_LOG.md D48；cognition-os/insights/I033（0.965 ± 0.044，χ²=11.99/13）。
Source: cognition-os/00_AI_BRIEFING.md (2026-10-14 D48 block); cognition-os/04_DECISION_LOG.md D48; cognition-os/insights/I033 (0.965 ± 0.044, χ²=11.99/13).
现在进展如何？Where does it stand?
测量冻结；v19 基线（14 场）可信；轮廓在 10.5–29 kpc 内平（χ²=11.99/13）。两个交叉验证实验 E013（谱联合似然）与 E014（RASS/OMNI）正在运行，结果待定。
The measurement is frozen; the v19 baseline (14 fields) is trusted; the profile is flat over 10.5–29 kpc (χ²=11.99/13). Two cross-check experiments, E013 (joint spectral likelihood) and E014 (RASS/OMNI), are running; their results are Pending.
还有什么没解决？What is unsolved?
① 前景与 M31 谱形几乎相同，无法按距离分解；② 外 NW 四场偏亮：纬度梯度、SWCX 还是仪器？③ Locatelli 预言 1.29 > 0.965；④ 300 kpc 图未开始。
(i) The foreground and M31 have nearly identical spectra, so distance separation fails; (ii) the bright outer-NW four: latitude gradient, SWCX, or instrument? (iii) Locatelli predicts 1.29 > 0.965; (iv) the 300-kpc map has not started.
最新骨架：流水线与各部分如何衔接Latest skeleton: the pipeline and how the parts connect
来源：流程依据 cognition-os/00_AI_BRIEFING.md 与 background_spectrum_fitting_2T_basedon_obsid_v19.py 的模型结构；数值见 cognition-os/insights/I033。
Source: the flow follows cognition-os/00_AI_BRIEFING.md and the model structure of background_spectrum_fitting_2T_basedon_obsid_v19.py; numbers from cognition-os/insights/I033.
目标表（O1–O5）Objectives (O1–O5)
| 目标Objective | 状态Status | 当前最好数值（估计器已命名）Best current number (estimator named) | 趋势Trend |
|---|---|---|---|
| O1 M31 内晕方向冷视线总和（CGMsum）的测量Total cool line-of-sight emission (CGMsum) toward the M31 inner halo | done | 14 场逆方差平均：吸收 0.5–2 keV 流量 0.965 ± 0.044；共温 kT = 0.17531 ± 0.00436 keV（v19，局部协方差误差）14-field inverse-variance mean: absorbed 0.5–2 keV flux 0.965 ± 0.044; common kT = 0.17531 ± 0.00436 keV (v19, local-covariance errors) | →冻结frozen |
| O2 由轮廓形状约束集中式 M31 热晕的大小/幅度Constrain the size/amplitude of a concentrated M31 hot halo from the profile shape | provisional | 快速流量级检验（I033）：β 模型（r_c=4 kpc）在 R=20 kpc 的近似 95% 上限 0.05–0.19（视 MW 模型与 β 而定）；Zhang 叠加预期 0.83。谱联合似然版本 E013 待定Quick flux-level check (I033): approximate 95% upper limit on a beta model (r_c=4 kpc) at R=20 kpc of 0.05–0.19 (depending on MW model and β); Zhang stack predicts 0.83. The spectral joint-likelihood version, E013, is Pending | ↗ |
| O3 外 NW 亮场的起源Origin of the bright outer-NW fields | 运行中running | 外 NW 四场加权平均 1.114 ± 0.071，其余十场 0.870 ± 0.056；线性银河纬度模型 Δχ² = 6.2（≈2.5σ）。E014（RASS+OMNI）待定Outer-NW four weighted mean 1.114 ± 0.071, other ten 0.870 ± 0.056; linear-in-b model Δχ² = 6.2 (≈2.5σ). E014 (RASS+OMNI) Pending | → |
| O4 银河系前景模型 + Local Hot Bridge 检验（300 kpc 图）MW foreground model + Local Hot Bridge test (300-kpc map) | 计划planned | 尚无新数值。Locatelli 模型在 M31 足迹投影 1.290 vs 测量 0.965（残差 −0.326，模型紧张）；Ueda 0.312、HaloSat 0.565No new number yet. Locatelli model projected at the M31 footprint: 1.290 vs measured 0.965 (residual −0.326, a model tension); Ueda 0.312, HaloSat 0.565 | → |
| O5 New-ANGELS III 论文The New-ANGELS III manuscript | draft | 16 页内部稿完成（AASTeX，5 表 3 图）；提交门槛见 I013（径向+侧向联合似然、边界感知区间、系统误差网格等）A 16-page internal draft exists (AASTeX, 5 tables, 3 figures); submission gates in I013 (shared radial-plus-side likelihood, boundary-aware intervals, the systematic grid, ...) | ↗ |
来源：O1 cognition-os/insights/I012 与 I033；O2/O3 cognition-os/insights/I033 与 newangels3_discussion/quick_shape_limit_20261014.txt；O4 cognition-os/00_AI_BRIEFING.md（D42–D46 数值）与 02_CURRENT_QUESTION.md；O5 cognition-os/insights/I013 与 paper_apj_v19_cgmsum_draft/README_draft_status_and_submission_gaps.md。
Source: O1 cognition-os/insights/I012 and I033; O2/O3 cognition-os/insights/I033 and newangels3_discussion/quick_shape_limit_20261014.txt; O4 cognition-os/00_AI_BRIEFING.md (D42–D46 numbers) and 02_CURRENT_QUESTION.md; O5 cognition-os/insights/I013 and paper_apj_v19_cgmsum_draft/README_draft_status_and_submission_gaps.md.
未解问题表Open problems
| 问题Problem | 为什么重要Why it matters | 当前最佳假设Best current hypothesis | 下一个检验Next test | 负责Owner | 状态Status |
|---|---|---|---|---|---|
| MW 与 M31 气体同温同形，EPIC 谱无法按距离分解（I006）MW and M31 gas share temperature and spectral shape; EPIC spectra cannot separate them by distance (I006) | 决定论文能声明什么：只能测总和 CGMsum，任何分量归属都需要外部假设Determines what the paper can claim: only the sum CGMsum is measured; any component split needs external assumptions | 分离只能来自空间形状（半径衰减、南北对称）与外部前景约束Separation can only come from spatial shape (radial decline, N/S symmetry) and external foreground constraints | E013 联合空间似然（A1 曲面 → A2 空间模型）E013 joint spatial likelihood (A1 surfaces → A2 spatial models) | E013 | 运行中running |
| 轮廓平（χ²=11.99/13）：M31 集中晕 ≤0.05–0.19 @20 kpc，远低于 Zhang 叠加 0.83The profile is flat (χ²=11.99/13): a concentrated M31 halo is ≤0.05–0.19 at 20 kpc, far below the Zhang stack 0.83 | 「缺失重子」要么比叠加预期暗几倍，要么分布很平（核 ≳30 kpc）The "missing baryons" are either several times fainter than the stacked expectation, or very flat (core ≳30 kpc) | M31 内晕热气比叠加均值暗，或与 MW/LG 退化为平背景M31 inner-halo gas is fainter than the stack mean, or degenerate with a flat MW/LG background | E013 A2 用谱似然复核上限（权威版本）E013 A2 re-derives the limit with the spectral likelihood (the authoritative version) | E013 | provisional |
| 外 NW 四场偏亮（1.11 vs 0.87，纬度梯度 Δχ²=6.2）The four outer-NW fields are bright (1.11 vs 0.87; latitude-gradient Δχ²=6.2) | 若为银河系纬度结构，会挤占 M31 的解释空间；若为 SWCX 则是时间效应If it is Galactic-latitude structure it eats into the M31 budget; if SWCX it is a time effect | 银河系前景纬度梯度或斑块（0601 的 kT=0.22 与 SWCX 待排除）An MW foreground latitude gradient or patch (0601's kT=0.22 and SWCX not yet excluded) | E014：RASS R45 独立历元/仪器 + OMNI 太阳风 + 噪声参数表E014: RASS R45 (independent epoch/instrument) + OMNI solar wind + the nuisance table | E014 | 运行中running |
| Locatelli MW 模型在 M31 方向预言 1.29 > 测量 0.965The Locatelli MW model predicts 1.29 > the measured 0.965 toward M31 | 若模型对，则无正的 M31 中心残差；紧张来自模型、转换或吸收之一If the model is right there is no non-negative central M31 residual; the tension lies in the model, the conversion, or absorption | 模型高估、线-宽带转换失配、或 v19 总和偏低（三种解释并列）Model over-prediction, line-to-band conversion mismatch, or a low-biased v19 sum (three live explanations) | 300 kpc RASS 图建立本地 MW 模型（O4）A 300-kpc RASS map to build a local MW model (O4) | 计划planned | 计划planned |
| 南北差异 0.212 ± 0.210（1.01σ）——一致性，不是非对称探测North-minus-South 0.212 ± 0.210 (1.01σ) — consistency, not an asymmetry detection | 非对称上限是论文的直接结果之一；两侧半径分布不匹配（中位 19.28 vs 14.97 kpc）The asymmetry limit is one of the paper's direct results; the two sides have unmatched radius distributions (medians 19.28 vs 14.97 kpc) | 总和在两侧一致；任何分量级非对称结论都需要 MW 均匀或 M31 对称假设The sum is consistent between sides; any component-level asymmetry claim needs MW-uniformity or M31-symmetry assumptions | 共享径向项 + 侧向偏移的联合拟合（I013 提交门槛 1）A joint fit with a shared radial term plus a side offset (I013 submission gate 1) | 计划planned | 计划planned |
来源：cognition-os/02_CURRENT_QUESTION.md（2026-10-14 D48 块）；cognition-os/insights/I033、I006、I012、I017；cognition-os/experiments/E013、E014。
Source: cognition-os/02_CURRENT_QUESTION.md (2026-10-14 D48 block); cognition-os/insights/I033, I006, I012, I017; cognition-os/experiments/E013, E014.
未来 1–4 周计划（依据 D48 与 02_CURRENT_QUESTION）Plan for the next 1–4 weeks (from D48 and 02_CURRENT_QUESTION)
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E013 A1 收尾：20 个冻结 v19 会话的逐场 (kT, norm) Δstat 曲面（≤12 h，≤6 workers）。产出
newangels3_discussion/E013_。 Finish E013 A1: per-field (kT, norm) Δstat surfaces from the 20 frozen v19 sessions (≤12 h, ≤6 workers). Outputs/surfaces/*.csv newangels3_discussion/E013_./surfaces/*.csv - E013 A2（Claude）：在曲面上插值联合似然 Σ Δstat_i(kT, N_MW(b_i)+A·g(r_i))，对 N_MW、梯度、kT 做 profile，A=0 边界用模拟校准单侧上限。 E013 A2 (Claude): interpolate the joint likelihood Σ Δstat_i(kT, N_MW(b_i)+A·g(r_i)) on the surfaces, profile over N_MW, the gradient and kT, and calibrate one-sided limits at the A=0 boundary by simulation.
- E014 交叉检验：RASS R45 逐场速率与纬度斜率（对照：R67 应为 0）、OMNI 太阳风质子通量（阈值 4e8 cm^-2 s^-1）、只读 Sherpa 噪声参数表。双路执行（luna + Hermes）。 E014 cross-check: RASS R45 per-field rates and the latitude slope (control: R67 should give 0), OMNI solar-wind proton flux (threshold 4e8 cm^-2 s^-1), and a read-only Sherpa nuisance table. Dual execution (luna + Hermes).
- 300 kpc RASS 图设计（E014 之后）：原生 counts+exposure 前向模型，扫描/瓦片噪声项；用于本地 MW 模型与 Local Hot Bridge 检验（O4）。 Design the 300-kpc RASS map (after E014): a native counts+exposure forward model with scan/tile nuisance terms; for a local MW model and the Local Hot Bridge test (O4).
- 论文讨论：把 I033 的三条科学线（总和、轮廓形状、NW 起源）写进 New-ANGELS III 草稿的讨论部分；提交门槛仍按 I013。 Paper discussion: write the three I033 science lines (total, profile shape, NW origin) into the New-ANGELS III draft discussion; submission gates remain those of I013.
来源：cognition-os/00_AI_BRIEFING.md（2026-10-14 D48）；cognition-os/02_CURRENT_QUESTION.md；cognition-os/experiments/E013、E014；cognition-os/insights/I013。
Source: cognition-os/00_AI_BRIEFING.md (2026-10-14 D48); cognition-os/02_CURRENT_QUESTION.md; cognition-os/experiments/E013, E014; cognition-os/insights/I013.
本次更新What's new
- 2026-10-14：D48 冻结 v19 测量；论文定名 New-ANGELS III；E013/E014 派发（结果待定）；Kavanagh 2020 更正（其区域是盘内背景，不是晕视线）。 2026-10-14: D48 freezes the v19 measurement; the paper is named New-ANGELS III; E013/E014 dispatched (results Pending); the Kavanagh 2020 correction (their regions are disc-adjacent backgrounds, not halo sightlines).
- 2026-10-14：本工作台（handbook）首次建成。 2026-10-14: this workbench (handbook) was first built.
来源：cognition-os/04_DECISION_LOG.md D48；cognition-os/insights/I033；cognition-os/experiments/E013、E014。
Source: cognition-os/04_DECISION_LOG.md D48; cognition-os/insights/I033; cognition-os/experiments/E013, E014.
数据截至Data as of
2026-10-14（最新读到的来源：cognition-os/00_AI_BRIEFING.md 的 2026-10-14 D48 块；newangels3_discussion/quick_shape_limit_20261014.txtnewest source read: the 2026-10-14 D48 block of cognition-os/00_AI_BRIEFING.md; newangels3_discussion/quick_shape_limit_20261014.txt）