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| Main Author: | |
|---|---|
| Format: | Recurso digital |
| Language: | German |
| Published: |
Zenodo
2025
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.17114462 |
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Table of Contents:
- <p>We present a ring-based, PSF-aware pipeline for de-</p> <p>termining the Radial Acceleration Relation (RAR)</p> <p>from integral field spectroscopic (IFS) velocity and flux</p> <p>maps (MaNGA MAPS). The method employs ellipti-</p> <p>cal rings along the kinematic major axis with strict</p> <p>azimuthal cuts (|cos θ| ≥ 0.9) and minimum spaxel</p> <p>requirements per ring, combined with hard geome-</p> <p>try gates on the radial outer reach relative to the</p> <p>PSF (rmax/PSFcore) and the number of independent</p> <p>rings. On the resulting EXTREME_STRICT sam-</p> <p>ple (N = 9), we find B ≈ 1.02 ±0.01 (MAD) and</p> <p>R2 ≈0.996, with median rmax/PSF ≈6.1 and ≈16</p> <p>ringspergalaxy. Simultaneously, theouterslopesshow</p> <p>aout ≈0 (median−8.7 ×10−8), with 0% of cases hav-</p> <p>ing aout ≤−0.3 or ≤−0.5. We thus demonstrate that</p> <p>flat outer rotation curves are not caused by PSF effects</p> <p>or geometric undersampling. The results are based (in</p> <p>this first version) on gas velocities (brightest emission</p> <p>line) and a data-driven baryon proxy from the stel-</p> <p>lar continuum; the pipeline generates QC plots, one-</p> <p>pagers, and tabular artifacts for reproducibility. Our</p> <p>findings support RAR linearity even in well-resolved</p> <p>outer regions and provide a robust basis for follow-up</p> <p>tests (e.g., stellar channel, line consistency, error-aware</p> <p>fits).</p>