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Record W7024306419

Probing the nature of young puffy planets through theoretical mass constraints

2024· dissertation· en· W7024306419 on OpenAlexaffabout

Bibliographic record

VenueeScholarship@McGill (McGill) · 2024
Typedissertation
Languageen
FieldPhysics and Astronomy
TopicCold Atom Physics and Bose-Einstein Condensates
Canadian institutionsMcGill University
FundersCalifornia Institute of TechnologyNational Aeronautics and Space Administration
KeywordsPlanetAsteroidField (mathematics)Habitability
DOInot available

Abstract

fetched live from OpenAlex

Discoveries of close-in young pu y( R p & 6R ü ) planets raise the question of whether they are bonafide hot Jupiters or pu ed-up Neptunes, potentially placing constraints on the formation location and timescale of hot Jupiters.Obtaining mass measurements for these planets is challenging due to stellar activity and noisy spectra.Therefore, we aim to provide independent theoretical constraints on the masses of these young planets based on their radii, incident fluxes, and ages, benchmarking to the planets of age <1 Gyr detected by K2 and TESS.Through a combination of interior structure models, considerations of photoevaporative mass loss, and empirical mass-metallicity trends, we present the range of possible masses for ≥26 planets of age ≥5-900 Myr and radii ≥3-16 R ü .We find that for the candidate hot Jupiters (R p & 6R ü ), planets with radii .9R ü are found to be below the gas giant planet mass regime (. 100 M ü ), while for planets with R p & 9R ü , we cannot rule out the possibility of them being gas giants.We further find that stellar metallicity is an important constraint on the upper limit of the mass, and we emphasize the importance of refining stellar abundances for young planet-hosting stars.Given our data and our Abstract ii results, all the youngest planets (. 100 Myr) are likely pu ed-up, Neptune-mass planets, while the bonafide hot Jupiters are only found around stars aged at least a few hundred Myr.This implies that high eccentricity tidal migration, which operates over timescales of hundreds of Myr to Gyr, is likely the dominant origin channel for hot Jupiters.iii Abrégé La découverte de jeunes planètes gonflées (R p & 6R ü ) proches de leurs étoiles pose la question de savoir s'il s'agit de véritables Jupiters chaudes ou de Neptunes gonflées, ce qui pourrait imposer des contraintes sur le lieu et l'échelle de temps de formation des Jupiters chaudes.Obtenir des mesures de masse pour ces planètes est un défi en raison de l'activité stellaire et des spectres bruyants des jeunes étoiles hôtes.Par conséquent, nous visons à fournir des contraintes théoriques indépendantes sur les masses de ces jeunes planètes en nous basant sur leurs rayons, leurs flux incidents et leurs âges, en les comparant aux planètes d'âge <1 Gyr détectées par K2 et TESS.En combinant des modèles de structure intérieure, des considérations sur la perte de masse par photoévaporation et des tendances empiriques de masse-métallicité, nous présentons l'intervalle de masses possibles pour ≥26 planètes d'âge ≥5-900 Myr et de rayons ≥3-16 R ü .Nous trouvons que pour les Jupiters chaudes candidates (R p & 6R ü ), les planètes de rayon .9R ü sont en dessous du régime de masse des planètes géantes (. 100 M ü ), alors que pour les planètes de R p & 9R ü , nous ne pouvons pas exclure la possibilité qu'elles soient des géantes.Nous constatons également Abrégé iv que la métallicité stellaire est une contrainte importante sur la limite supérieure de la masse et nous soulignons l'importance du suivi des abondances stellaires pour les jeunes étoiles hôtes.Compte tenu de nos données et de nos résultats, toutes les planètes les plus jeunes (. 100 Myr) sont probablement des planètes gonflées de la masse de Neptune, tandis que les véritables Jupiters chaudes ne se trouvent qu'autour d'étoiles âgées d'au moins quelques centaines de Myr.Cela implique que la migration des marées à haute excentricité, qui opère sur des échelles de temps allant de centaines de Myr à Gyr, est probablement le canal d'origine dominant pour les Jupiters chaudes.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.007
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.005
Threshold uncertainty score0.017

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.007
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0010.001
Science and technology studies0.0010.001
Scholarly communication0.0010.002
Open science0.0010.001
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0050.001

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.

Opus teacher head0.008
GPT teacher head0.239
Teacher spread0.231 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designSimulation or modeling
Domainnot available
GenreEmpirical

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".

Quick stats

Citations0
Published2024
Admission routes2
Has abstractyes

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