Table · dataset · 2023
Ultracool SpeXtroscopic survey. I. M7-L5 sample
Listed in IVOA Registry (Virtual Observatory)
We present a volume-limited, spectroscopically verified sample of M7-L5 ultracool dwarfs (UCDs) within 25pc.
Description
The sample contains 410 sources, of which 93% have trigonometric distance measurements (80% from Gaia DR2) and 81% have low-resolution (R~120), near-infrared (NIR) spectroscopy. We also present an additional list of 60 sources that may be M7-L5 dwarfs within 25pc when distance or spectral-type uncertainties are taken into account.
The spectra provide NIR spectral and gravity classifications, and we use these to identify young sources, red and blue J-K_S_ color outliers, and spectral binaries. We measure very low gravity and intermediate-gravity fractions of 2.1_-0.8_^+0.9^ and 7.8_-1.5_^+1.7^, respectively; fractions of red and blue color outliers of 1.4_-0.5_^+0.6^ and 3.6_-0.9_^+1.0^, respectively; and a spectral binary fraction of 1.6_-0.5_^+0.5^.
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We present an updated luminosity function for M7-L5 dwarfs continuous across the hydrogen-burning limit that agrees with previous studies. We estimate our completeness to range between 69% and 80% when compared to an isotropic model. However, we find that the literature late-M sample is severely incomplete compared to L dwarfs, with completeness of 62_-7_^+8^ and 83_-9_^+10^, respectively.
This incompleteness can be addressed with astrometric-based searches of UCDs with Gaia to identify objects previously missed by color- and magnitude-limited surveys.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/883/205 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2019ApJ...883..205B ui.adsabs.harvard.edu/abs/2019ApJ...883..205B ↗
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/883/205 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Infrared
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/883/205 | 14 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:infrared | 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 |