Table · dataset · 2023
Lithium and beryllium in Gaia-Enceladus galaxy
Listed in IVOA Registry (Virtual Observatory)
Data from Gaia DR2 and The Apache Point Observatory Galactic Evolution Experiment surveys revealed a relatively new component in the inner Galactic halo, which is likely the dynamical remnant of a disrupted dwarf galaxy named Gaia-Enceladus that collided with the Milky Way about 10Gyr ago.
Description
This merging event offers an extraordinary opportunity to study chemical abundances of elements in a dwarf galaxy, since they are generally hampered in external galaxies.
Here, we focus on ^7^Li and ^9^Be in dwarf stars that are out of reach even in Local Group galaxies. Searching in GALAH, Gaia-ESO survey and in literature, we found several existing ^7^Li abundance determinations of stars belonging to the Gaia-Enceladus galaxy. The ^7^Li abundances of stars at the low metallicity end overlap with those of the Galactic halo.
Read the rest (2 more)
These are effective extragalactic ^7^Li measurements, which suggest that the ^7^Li Spite plateau is universal, as is the cosmological ^7^Li problem. We found a ^7^Li-rich giant out of 101 stars, which suggests a small percentage similar to that of the Milky Way. We also collect ^9^Be abundance for a subsample of 25 Gaia-Enceladus stars from literature.
Their abundances share the Galactic [Be/H] values at the low metallicity end but grow slower with [Fe/H] and show a reduced dispersion. This suggests that the scatter observed in the Milky Way could reflect the different ^9^Be evolution patterns of different stellar components that are mixed-up in the Galactic halo.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/2902 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2020MNRAS.496.2902M ui.adsabs.harvard.edu/abs/2020MNRAS.496.2902M ↗
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/mnras/496/2902 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/mnras/496/2902 | 13 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 | |
| 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 |