Table · dataset · 2022
Photometry and astrometry in NGC 1664 and NGC 6939
Listed in IVOA Registry (Virtual Observatory)
This study calculated astrophysical parameters, as well as kinematic and galactic orbital parameters, of the open clusters NGC1664 and NGC6939.
Description
The work is based on CCD ultraviolet, blue, and visual (UBV) and Gaia photometric and astrometric data from ground- and space-based observations. Considering Gaia Early Data Release 3 (EDR3) astrometric data, we determined membership probabilities of stars located in both of the clusters.
We used two-color diagrams to determine the E(B-V) color excesses for NGC1664 and NGC6939 as 0.190{+/-}0.018 and 0.380{+/-}0.025mag, respectively. Photometric metallicities for the two clusters were estimated as [Fe/H]=-0.10{+/-}0.02dex for NGC1664 and as [Fe/H]=-0.06{+/-}0.01dex for NGC6939. Using the reddening and metallicity calculated in the study, we obtained distance moduli and ages of the clusters by fitting parsec isochrones to the color-magnitude diagrams based on the most likely member stars.
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Isochrone fitting distances are 1289{+/-}47pc and 1716{+/-}87pc, which coincide with ages of 675{+/-}50Myr and 1.5{+/-}0.2Gyr for NGC1664 and NGC6939, respectively. We also derived the distances to the clusters using Gaia trigonometric parallaxes and compared these estimates with the literature. We concluded that the results are in good agreement with those given by the current study.
Present-day mass function slopes were calculated as {Gamma}=-1.22{+/-}0.33 and {Gamma}=-1.18{+/-}0.21 for NGC1664 and NGC6939, respectively, which are compatible with the Salpeter slope. Analyzes showed that both of clusters are dynamically relaxed. The kinematic and dynamic orbital parameters of the clusters were calculated, indicating that the birthplaces of the clusters are outside the solar circle.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/191 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2022AJ....163..191K ui.adsabs.harvard.edu/abs/2022AJ....163..191K ↗
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/aj/163/191 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/163/191 | 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:infrared | source · 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 |