Raising galaxy rotation curves via dressing
| Autoři | |
|---|---|
| Rok publikování | 2025 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Physical Review D |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | https://link.aps.org/doi/10.1103/m9xl-9vvk |
| Doi | https://doi.org/10.1103/m9xl-9vvk |
| Klíčová slova | Galaxy rotation curves; Diffeomorphisms invariance; Dressing Field Method; Relational physics |
| Popis | We present a manifestly diffeomorphism-invariant simple model of galaxy dynamics obtained by applying the dressing field method (DFM) to a general relativistic system comprising the metric and four scalar fields, phenomenologically representing the four-velocity of a cosmological fluid or dust field. The DFM, a systematic tool for extracting the gauge-invariant content in general relativistic theories, provides a physical coordinatization that yields corrective terms to the rotational velocity profile. These corrections produce galaxy rotation curves that combine Keplerian and constant velocity terms, effectively emulating a dark matter contribution. We compare DFM-derived rotation curves to observed data for spiral galaxies, from the Spitzer Photometry and Accurate Rotation Curves database, showing that the DFM allows one to fit them well. |
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