On the nucleus structure and activity of comet 67P/Churyumov-Gerasimenko
Why is this work in the frame?
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Machine scores (provisional)
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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.
- Teacher spread
- 0.217 · how far apart the two teachers sit on this one work
- Validation status
score_only:v0-immature-baseline· verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
Abstract
Images from the OSIRIS scientific imaging system onboard Rosetta show that the nucleus of 67P/Churyumov-Gerasimenko consists of two lobes connected by a short neck. The nucleus has a bulk density less than half that of water. Activity at a distance from the Sun of >3 astronomical units is predominantly from the neck, where jets have been seen consistently. The nucleus rotates about the principal axis of momentum. The surface morphology suggests that the removal of larger volumes of material, possibly via explosive release of subsurface pressure or via creation of overhangs by sublimation, may be a major mass loss process. The shape raises the question of whether the two lobes represent a contact binary formed 4.5 billion years ago, or a single body where a gap has evolved via mass loss.
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.
The record
- Venue
- Science
- Topic
- Astro and Planetary Science
- Field
- Physics and Astronomy
- Canadian institutions
- —
- Funders
- Science and Technology Facilities CouncilJet Propulsion LaboratoryMinistry of Science and Technology, TaiwanAgenzia Spaziale ItalianaSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungCentre National d’Etudes SpatialesDeutsches Zentrum für Luft- und RaumfahrtSwedish National Space AgencyMountain Equipment Co-operative
- Keywords
- NucleusSublimation (psychology)Explosive materialCometPhysicsAstrophysicsOsirisGeologyChemistryBiologyCell biology
- Has abstract in OpenAlex
- yes