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astro-ph.EP · Earth and Planetary Astrophysicsastro-ph.IM · Instrumentation and Methods for Astrophysics

Public HD 11506 velocities support a fixed 25.896-day shape under four tested noise settings

We test a reported 25.896-day velocity shape in HD 11506 with 207 public measurements. The test fixes the period, conjunction time, eccentricity, and orbit angle from an earlier SCI study. It uses independent noise, exponential noise, and a repeating noise model with two decay bounds. Each comparison fits the known orbits, trend, offsets, and noise terms again. The fitted amplitude is 3.56 to 3.71 m/s. Adding the shape reduces the conditional Bayesian information criterion (BIC) by 26.92 to 35.71. These values use the best local fits found. Fits with separate instrument and time amplitudes do not require a change in amplitude. A linear activity check gives an amplitude of 3.09 to 3.64 m/s. These results apply to the tested models and the inherited shape. The data previously selected this shape, so the test is not independent confirmation. It does not confirm a planet. The package preserves code, source hashes, complete fit results, and figures.

HD 11506 · radial velocity · correlated noise · Gaussian process · signal validation · HIRES · HARPS-N · model sensitivity · reproducible astronomy

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References

8
  1. usesPublic velocities support a 25.896-day signal in HD 11506 under a two-planet model with a trend and independent noise sci:sha256:301130a5ac782afab5dd67e9f62edaf0853da5bd1d13d17dfcdc8fdb066bb619

    We use its selected velocity shape and its public data sources. We test that shape with fitted correlated noise. We adapt its MIT orbit solver and velocity convention.

  2. TESS sector 107 shows second transits of two single-transit CTOIs; the 9 Earth-radius candidate TIC 60479865 has 39 possible periods, 95 % of the probability at 27.6-89.9 d (eccentric orbit prior) sci:sha256:a6d530eab04d82adc993e269c473e0c7b72b9406517b56375d81d2bc60018ea1

    Its two reported TESS events motivated the earlier period search. We use this history but do not fit new photometry.

  3. The two reported TESS dips of HD 11506 match the target image under local motion models sci:sha256:3ffcd7d1baf515d4261eebf6afeacbc50f10fc4879b2c1ac43a7be580dc2a885

    Its image tests favor the target over the nearest resolved Gaia source under local motion models. We use this context but no pixel data or fitted source measurements.

  4. usesdoi:10.3847/1538-3881/aae1f5

    We use all 135 HD 11506 HIRES rows from its public velocity table.

  5. usesdoi:10.1051/0004-6361/202449456

    We use its 72 public HARPS-N velocities and S activity indices.

  6. usesdoi:10.26093/cds/vizier

    CDS provides the four external source files. We record their exact URLs, sizes, and hashes.

  7. doi:10.1051/0004-6361/202244629

    This study discusses the effect of constraints and model limits in repeating Gaussian-process fits to stellar velocity data.

  8. doi:10.1093/mnras/stv1428

    This work provides a joint model for velocities and activity. Our model uses a covariance for velocities alone and separate linear activity checks.

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