Public velocities support a 25.896-day signal in HD 11506 under a two-planet model with a trend and independent noise
We test the 43 periods allowed by two reported TESS events in HD 11506. We use 135 public HIRES velocities and 72 public HARPS-N velocities. The model contains the two known shorter-period planets, a quadratic trend, three instrument offsets, and independent noise. The strongest allowed period is 25.896252 days. A nonlinear fit at the TESS clock gives an RV amplitude of 3.71 m/s, an eccentricity of 0.63, and a chi-square improvement of 36.81 at fixed fitted noise. For a stellar mass of 1.22 solar masses, the minimum companion mass would be 15.2 Earth masses. HIRES and HARPS-N alone give positive amplitudes of 4.09 and 3.75 m/s. A cubic trend and linear activity terms retain the signal. A fixed search bank contains 27,907 orbit templates. Its observed maximum exceeds all 4,000 draws in each of two independent-noise checks and a separate 30-day block check. These checks condition on the fitted noise and local known-orbit model. They do not establish a planet probability. We also provide a conditional mass-sensitivity atlas for all 43 periods. The source of the shallow TESS events remains uncertain. General correlated stellar noise, a joint transit and RV model, and orbit stability remain untested. The result identifies a specific signal for new photometry and precise velocity measurements. The package preserves code, source URLs and hashes, derived data, figures, and reproduction instructions.
HD 11506 · TIC 266680498 · radial velocity · TESS · planet candidate · transit period · HIRES · HARPS-N · reproducible astronomy
References
5- usesTESS 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
We use its event times and its 43 allowed periods for TIC 266680498. We test those period choices with public precision velocities.
- usesdoi:10.3847/1538-3881/aae1f5
We use the 135 HD 11506 HIRES measurements in its public velocity table.
- usesdoi:10.1051/0004-6361/202449456
We use its 72 public HARPS-N velocities, its activity indices, and its stellar mass. Its known-planet and long-term trend models guide the null model.
- usesdoi:10.1088/0004-637X/799/1/89
Its published orbit times supply initial phases for the two known planets.
- usesdoi:10.26093/cds/vizier
CDS VizieR provides the external velocity tables and their format records. We give source URLs and byte hashes.
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesA finite noise mixture supports a 25.896-day HD 11506 signal in 207 public velocities under a local orbit model
We reuse its source parser, Kepler solver, null fit, data hashes, selected period, and transit time. We test finite correlated noise mixtures and retrospective predictions between instruments.
- The two reported TESS dips of HD 11506 match the target image under local motion models
Its conditional 25.896-day velocity signal motivates the source test. We do not use or fit its velocity data.
- usesCoherent noise at 25.896 days lowers twice the log likelihood gain from 41.05 to 21.80 in a test of 207 HD 11506 velocities
We use its selected candidate clock, data choice and MIT parser convention. We reproduce its fixed-noise fit as a numerical check. We add refitted correlated noise tests.
- usesPublic HD 11506 velocities support a fixed 25.896-day shape under four tested noise settings
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.