A Morphology-Specic Operator Family for Disk-Galaxy Kinematics: From Proxy Phenomenology toward a Class-Conditioned Field Response
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| Formato: | Recurso digital |
| Lenguaje: | inglés |
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2026
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| _version_ | 1866901191021035520 |
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| author | Flügge, Jan-Frederik |
| author_facet | Flügge, Jan-Frederik |
| contents | <p>We introduce a morphology-specic operator family for disk-galaxy kinematics and validate it on</p> <p>an independent, overlap-free fresh-only population (Pop C). The operator is constructed from the local residual</p> <p>structure of observed-minus-baryonic rotation curves, decomposed into radial windows normalised by the disk</p> <p>scale length. A bounded weighting search over these windows, applied separately per morphological class on</p> <p>Pop C, yields two empirically supported regimes: (i) an innermiddle suppression channel for low-surface-</p> <p>brightness (LSB) galaxies, S<span>⋆</span></p> <p><span>LSB </span>= 0.5 ⟨|O|⟩<span>inner </span>+ 0.5 ⟨|O|⟩<span>middle</span>, with a median non-isolated/isolated ratio of</p> <p>0.527 and Cli's δ=−0.500; and (ii) an outer enhancement channel for normal disk galaxies, S<span>⋆</span></p> <p>disk <span>= ⟨|O|⟩</span>outer<span>,</span></p> <p>with a ratio of 1.983 and Cli's δ= +0.289. A minimal forward model V<span>obs</span>(R)−V<span>bar</span>(R) = αO<span>class</span>(R), using</p> <p>a single global coupling αper class and no galaxy-specic freedom, improves the baryons-only residual channel</p> <p>(LSB: R<span>2 </span>from 0.330 to 0.510; disk: R<span>2 </span>from 0.437 to 0.550). A bidirectional holdout test conrms that the</p> <p>LSB channel generalises out-of-sample. Bulge-dominated systems do not form a coherent single global class</p> <p>under the same architecture; however, a diagnostic subclass decomposition reveals an environment-modulated,</p> <p>negatively coupled bulge-core channel that remains positive under leave-one-galaxy-out validation at the level</p> <p>of predictive gain. The data therefore support a class-conditioned operator family whose morphology-specic</p> <p>structure reduces the baryonic residual channel in a nontrivial and independently tested manner</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19116709 |
| institution | Zenodo |
| language | eng |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | A Morphology-Specic Operator Family for Disk-Galaxy Kinematics: From Proxy Phenomenology toward a Class-Conditioned Field Response Flügge, Jan-Frederik Galaxy kinematics Galaxy dynamics SPARC galaxies: structure Dark Matter modified Gravity <p>We introduce a morphology-specic operator family for disk-galaxy kinematics and validate it on</p> <p>an independent, overlap-free fresh-only population (Pop C). The operator is constructed from the local residual</p> <p>structure of observed-minus-baryonic rotation curves, decomposed into radial windows normalised by the disk</p> <p>scale length. A bounded weighting search over these windows, applied separately per morphological class on</p> <p>Pop C, yields two empirically supported regimes: (i) an innermiddle suppression channel for low-surface-</p> <p>brightness (LSB) galaxies, S<span>⋆</span></p> <p><span>LSB </span>= 0.5 ⟨|O|⟩<span>inner </span>+ 0.5 ⟨|O|⟩<span>middle</span>, with a median non-isolated/isolated ratio of</p> <p>0.527 and Cli's δ=−0.500; and (ii) an outer enhancement channel for normal disk galaxies, S<span>⋆</span></p> <p>disk <span>= ⟨|O|⟩</span>outer<span>,</span></p> <p>with a ratio of 1.983 and Cli's δ= +0.289. A minimal forward model V<span>obs</span>(R)−V<span>bar</span>(R) = αO<span>class</span>(R), using</p> <p>a single global coupling αper class and no galaxy-specic freedom, improves the baryons-only residual channel</p> <p>(LSB: R<span>2 </span>from 0.330 to 0.510; disk: R<span>2 </span>from 0.437 to 0.550). A bidirectional holdout test conrms that the</p> <p>LSB channel generalises out-of-sample. Bulge-dominated systems do not form a coherent single global class</p> <p>under the same architecture; however, a diagnostic subclass decomposition reveals an environment-modulated,</p> <p>negatively coupled bulge-core channel that remains positive under leave-one-galaxy-out validation at the level</p> <p>of predictive gain. The data therefore support a class-conditioned operator family whose morphology-specic</p> <p>structure reduces the baryonic residual channel in a nontrivial and independently tested manner</p> |
| title | A Morphology-Specic Operator Family for Disk-Galaxy Kinematics: From Proxy Phenomenology toward a Class-Conditioned Field Response |
| topic | Galaxy kinematics Galaxy dynamics SPARC galaxies: structure Dark Matter modified Gravity |
| url | https://doi.org/10.5281/zenodo.19116709 |