Time delay analysis of the delta Scuti pulsations in the exoplanet host star beta Pictoris based on space and ground-based photometry
Bibliographic record
Abstract
This thesis analyses the phase variations of the delta Scuti pulsations of beta Pictoris in order to search for time delays that might be caused by companions in the system. The photometric data of the star was collected over approximately four years by the BRITE-Constellation, bRing, ASTEP and TESS. \n\nThe uncertainty in the phases and frequencies, however, are too high to see the influence of one of the two exoplanets beta Pictoris b or c on the timing of the pulsations of their host star. We compare the calculated time delays with a simulated data set and find that both are in agreement with each other, showing that the current observations are not able to give meaningful results. \n\nAdditional photometry of beta Pictoris, which will be collected by TESS between 2021 and 2022, will lead to a better frequency determination and therefore to provide another chance to search for the signature of both currently known planets in the system. \n\nWe also use the TESS observations to derive a frequency list of the strongest 37 significant delta Scuti pulsations. The residuals of the TESS photometry are investigated for periodic transits using a Box Least Squares (BLS) algorithm showing no significant detection.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".