Table · dataset · 2022
Ions individual abundances in LAMOST J1109+0754
Listed in IVOA Registry (Virtual Observatory)
This study presents a comprehensive chemodynamical analysis of LAMOSTJ1109+0754, a bright (V=12.8), extremely metal-poor ([Fe/H]=-3.17) star, with a strong r-process enhancement ([Eu/Fe]=+0.94{+/-}0.12).
Description
Our results are based on the 7D measurements supplied by Gaia and the chemical composition derived from a high-resolution (R~110000), high signal-to-noise ratio (S/N~60) optical spectrum obtained by the 2.4m Automated Planet Finder Telescope at Lick Observatory.
We obtain chemical abundances of 31 elements (from lithium to thorium). The abundance ratios ([X/Fe]) of the light elements (Z<~30) suggest a massive Population III progenitor in the 13.4-29.5M{sun} mass range. The heavy-element (30<Z<~90) abundance pattern of J1109+075 agrees extremely well with the scaled-solar r-process signature.
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We have developed a novel approach to trace the kinematic history and orbital evolution of J1109+0754 with a cOsmologically deRIved timE-varyiNg Galactic poTential (the ORIENT) constructed from snapshots of a simulated Milky Way analog taken from the Illustris-TNG simulation. The orbital evolution within this Milky Way-like galaxy, along with the chemical abundance pattern, implies that J1109+0754 likely originated in a low-mass dwarf galaxy located ~60kpc from the center of the Galaxy, which was accreted ~6-7Gyr ago, and that the star now belongs to the outer-halo population.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/903/88 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2020ApJ...903...88M ui.adsabs.harvard.edu/abs/2020ApJ...903...88M ↗
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/apj/903/88 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 70% · Simulation 75%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/903/88 | 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 (70%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[method].local:method:simulation | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (75%) |
| 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 |