Table · dataset · 2025
GD-1 and Kshir tidal streams metallicity and motion
Listed in IVOA Registry (Virtual Observatory)
To explore the metallicity and kinematic properties of stellar streams, we selected the members of the GD-1 stream and Kshir stream, and conducted out a detailed analysis of the member stars of the stellar streams.
Description
By utilizing the spectral data from LAMOST DR10 and SDSS DR16, and integrating them with the astrometric data from Gaia DR3, we identified the member stars of the stellar streams through an analysis of their geometric space, velocity space, and metallicity properties.
Based on these identified member stars, we discovered and summarized the metallicity and kinematic properties of the stellar streams. 152 members and 68 members were identified in the GD-1 stream and the Kshir stream, respectively. The average metallicity of the GD-1 stream is [Fe/H]=-2.19+/-0.10dex. The known gaps at phi_1_=-20{deg} and phi_1_=-40{deg} were confirmed, and a possible new gap at phi_1_=-60{deg} was found.
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For the first time, we found that the formation reasons of the gaps are that there is a large velocity difference on both sides of the gaps and the velocities at both ends of the stream are reversed. These velocity characteristics may be due to the gaps being near a "turnaround" point in the stream orbit, or the stellar stream was significantly impacted by the massive Sagittarius 3Gyr ago. The average metallicity of the Kshir stream is [Fe/H]=-1.65+/-0.13dex.
The radial velocity and proper-motion distributions along the Kshir stream are consistent with those of the GD-1 stream. Presumably, they are orbital wraps of the same structure.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A13 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025A&A...700A..13S ui.adsabs.harvard.edu/abs/2025A%26A...700A..13S ↗
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/700/a13 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 72%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/700/a13 | 15 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (72%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | source · 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 |