Table · dataset · 2020
122 long-period comets non-gravitational param.
Listed in IVOA Registry (Virtual Observatory)
The original 1/a-distribution is the only observational basis for the origin of long-period comets (LPCs) and the dynamical properties of the Oort Cloud.
Description
Although they are very subtle in the motion of these comets, non-gravitational effects can cause major changes in the original semimajor axis, 1/a_ori_ We obtained reliable non-gravitational orbits for as many LPCs with small perihelion distances of q<3.1au as possible, and determined the corresponding shape of the Oort spike.
We determined the osculating orbits of each comet using several data-processing methods, and selected the preferred orbit using a few specific criteria. The distribution of 1/a_ori_ for the whole comet sample was constructed using the individual Gaussian distribution we obtained for the preferred solution of each comet. The derived distribution of 1/a_ori_ for almost all known small-perihelion Oort spike comets was based on 64% of the non-gravitational orbits.
Read the rest (2 more)
This was compared with the distribution based on purely gravitational orbits, as well as with 1/a_ori_ constructed earlier for LPCs with q>3.1 au. We present a statistical analysis of the magnitudes of the non-gravitational acceleration for about 100~LPCs. The 1/a_ori_-distribution, which is based mainly on the non-gravitational orbits of small-perihelion Oort spike comets, is shifted by about 10x10^-6^au^-1^ to higher values of 1/a_ori_ compared with the distribution that is obtained when the non-gravitational effects on comet motion are ignored.
We show the differences in the 1/a_ori_-distributions between LPCs with q<3.1au and those with q>3.1au. These findings indicate the important role of non-gravitational~acceleration in the motion and origin of LPCs and in the formation of the Oort Cloud.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/633/A80 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2020A&A...633A..80K ui.adsabs.harvard.edu/abs/2020A%26A...633A..80K ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/a%2Ba/633/a80 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/633/a80 | 10 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |