MétaCan
Menu
Back to cohort
Record W2015999483 · doi:10.1051/0004-6361:20030955

Deep optical observations of the supernova remnant G 78.2+2.1

2003· article· en· W2015999483 on OpenAlexfundno aff
F. Mavromatakis

Bibliographic record

VenueAstronomy and Astrophysics · 2003
Typearticle
Languageen
FieldPhysics and Astronomy
TopicAstrophysics and Cosmic Phenomena
Canadian institutionsnot available
FundersFoundation for Research and Technology-HellasNational Research Council CanadaUniversity of CreteNational Aeronautics and Space AdministrationCalifornia Institute of TechnologyJet Propulsion Laboratory
KeywordsPhysicsAstrophysicsSupernova remnantInterstellar mediumSpectral lineExtinction (optical mineralogy)Emission spectrumH II regionSupernovaLine (geometry)IonizationInfraredFlux (metallurgy)Adiabatic processElectron densityShock (circulatory)AstronomyGalaxyElectronStar formationOptics

Abstract

fetched live from OpenAlex

The wide-field covered by the supernova remnant G 78.2+2.1 was observed in the optical emission lines of H], [] and []. The flux calibrated images reveal several regions in the field which dominate the optical emission but we were able to identify possible areas of shock-heated emission through the H] and [] images. These are mainly found to the north-east of γ Cygni as well as in the south and the morphology of the detected emission is patchy and diffuse. A few patchy structures are also detected in the medium ionization line image of []. Long-slit spectra taken at one of the candidate positions verify that we have detected radiation from shock-heated gas ([]/Hα 0.6). The estimated shock velocity lies below 100 km s-1, while the measured electron density of ~700 cm-3 implies preshock cloud densities of ~20 cm-3. High resolution maps in the infrared show that the optical emission, which may be associated with G 78.2+2.1, lies in areas relatively free of infrared emission. The interstellar extinction measured through the optical spectra is compatible with current estimates of the distance to the remnant. The optical data are in agreement with the explosion energy and interstellar medium density estimated from the X-ray data suggesting that the remnant is still in the adiabatic phase of its evolution. A second set of spectra taken in the north-west suggests that we are probably dealing with a foreground region.

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 distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.590
Threshold uncertainty score0.725

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.012
GPT teacher head0.199
Teacher spread0.187 · 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 teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designTheoretical or conceptual
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

Citations24
Published2003
Admission routes1
Has abstractyes

Explore more

Same venueAstronomy and AstrophysicsSame topicAstrophysics and Cosmic PhenomenaFrench-language works237,207