Table · dataset · 2015
Luhman 16AB X-shooter spectra
Listed in IVOA Registry (Virtual Observatory)
We obtained high signal-to-noise intermediate-resolution (R~6000-11000) optical (600-1000nm) and near-infrared (1000-2480nm) spectra of each component of the the closest brown dwarf binary, Luhman 16AB, with X-Shooter on the Very Large Telescope (VLT).
Description
We classify the primary and secondary as L6-L7.5 and T0+/-1, respectively, in agreement with previous measurements. We present measurements of the lithium pseudo-equivalent widths, which appears of similar strength on both components.
The presence of lithium (^7^Li) in both components imply masses below 0.06M_{sun} while comparison with models suggests lower limits of 0.04M_{sun}. The detection of lithium in the T component is the first of its kind. Similarly, we assess the strength of other alkali lines (e.g. 6-7{AA} for RbI and 4-7{AA} for CsI features) and compare them with estimates for L and T dwarfs.
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We also derive effective temperatures and luminosities of each component of the binary (-4.66dex, 1305K) and (-4.68dex, 1320K) for the L and T dwarf, respectively. Using our radial velocity determinations, the binary does not appear to belong to any of the well-known moving group. Our preliminary theoretical analysis of the optical and J-band spectra indicates that the L- and T-type spectra can be reproduced with a single temperature and gravity but different relative chemical abundances which impact strongly the spectral energy distribution of L/T transition objects.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/581/A73 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2015A&A...581A..73L ui.adsabs.harvard.edu/abs/2015A%26A...581A..73L ↗
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/581/a73 ↗
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/a+a/581/a73 | 12 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 |