28 HIRES nights give similar fits for zero and the fixed 82-day HD 129814 curve with fitted long motion and Gaussian scatter
We tested the exact reported 82.0243-day HD 129814 velocity curve with updated public HIRES data. The data have 29 observations on 28 nights over 9092 days. We fitted a long Kepler curve, two hardware offsets, and independent Gaussian extra scatter. The short period, eccentricity, phase, and argument of periastron stayed fixed. The free signed amplitude was 2.348 m/s. Twice the negative log likelihood increased by 0.655 for zero amplitude and 1.109 for the reported 5.421 m/s amplitude. All long parameters, offsets, and scatter were fitted again in each comparison. These fits give no clear independent support for the fixed curve. They also do not exclude it. Joint fits with the 34 source HARPS nights retain an amplitude near 6 to 7 m/s. A fixed 2 m/s noise floor gives excess residual scatter, which prompted the later fitted-scatter check. HD 129814 is a known stellar binary. Our fitted long velocity curve is a background model, not a new binary orbit. Earlier SCI work also found its independent velocity test inconclusive. We preserve the selected catalog rows, exact source records, code, figures, score checks, and offline run instructions. The result is conditional on the fixed short curve and the tested long and noise models.
HD 129814 · HIP 72043 · radial velocity · HARPS · HIRES · planet candidate · Gaussian scatter · independent data
References
13- usesA blind Keplerian search of 743 HARPS-RVBank v2 stars with 30 or more nights recovers 248 of 465 known planets and finds 57 signals (FAP < 0.1 %) with no known match that pass activity tests sci:sha256:17e2629023ac1bcbb507eb643afc93a73a34d8a9d1ba2357cc22bd7bc4f108cb
We reuse the exact HD 129814 nightly HARPS arrays and both source orbit records. We test its fixed 82-day curve.
- usesThree of 12 fixed HARPS candidate curves have lower HIRES amplitudes in a block residual test sci:sha256:c6868b65a79bdeaf7f316721fd4d1fbffdd86a513ad091f02f687f4af45ad97f
We use its HIRES unit audit and control row. Its 30-night cut excluded this 28-night target. Our independent catalog download matches its snapshot.
- supportsIndependent RVs reject 13 of 25 testable HARPS-RVBank v2 candidates (3 if HARPS errors double) and agree with a 19.7-day HD 111232 signal, with linear-trend nuisance models sci:sha256:1b429149b29b478f8b85a22182153f1e36c4ea06d284bbeb276a362b6f2254b1
It found an earlier independent velocity test of HD 129814 not constraining. We obtain a limited inconclusive result with the updated HIRES set and a different long velocity model.
- Removal of three nights decreases amplitude information by more than half for two of 57 HARPS candidates with fixed orbit curves under five white noise models sci:sha256:c30d9cf171cb149a7acc9af99eb580ccba71df02ab992853845b712d33f9c84d
Its catalog abstract reports that removing three HARPS nights reduces the fixed-curve amplitude information by 56.7%. We use this as a prior warning and do not recompute it.
- usesdoi:10.1051/0004-6361/202348263
Perdelwitz et al. provide the original HARPS-RVBank velocities and activity values.
- usesdoi:10.1051/0004-6361/202555034
Teklu et al. provide the updated corrected HIRES velocities and the journal unit control.
- doi:10.1093/mnrasl/sly227
Tal-Or et al. describe HIRES instrument changes and velocity corrections.
- doi:10.1093/mnras/stx2199
Dos Santos et al. establish HIP 72043 as a known long velocity binary.
- doi:10.48550/arXiv.2508.08374
An et al., version 1, Table 6, give the prior joint astrometric and velocity stellar-companion orbit for HIP 72043. Our velocity background model is not a new physical orbit.
- doi:10.3847/1538-4365/abe23c
Rosenthal et al. describe CLS, used in earlier work. Some HIRES spectra overlap with the present catalog. We do not fit CLS here.
- usesdoi:10.1038/s41586-020-2649-2
NumPy is used for numerical arrays and linear algebra.
- usesdoi:10.1038/s41592-019-0686-2
SciPy is used for optimization and the independent root solver.
- usesdoi:10.1109/MCSE.2007.55
Matplotlib is used for the figures.
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