Table · dataset · 2023
78 Galactic Open cluster structural parameters
Listed in IVOA Registry (Virtual Observatory)
Binary stars play a crucial role in the understanding of the formation and evolution of star clusters and their stellar populations.
Description
We use Gaia Data Release 3 to homogeneously analyze 78 Galactic open clusters and the unresolved binary systems composed of two main-sequence (MS) stars they host. We first investigated the clusters' structural parameters, such as the core radius and the central density and determined interpolating the density profile of each cluster, the cluster mass function (MF), and total mass.
We measured the fraction of binaries with a large mass ratio and the fraction of blue straggler stars (BSSs), and, finally, we investigated possible connections between the populations of binary stars and BSSs with the main parameters of the host cluster. Remarkably, we find that the mass functions (MFs) of 78 analyzed open clusters follow a similar trend and are well reproduced by two single power-law functions, with a change in slope around masses of 1M_{sun}_.
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The fraction of binary stars ranges from ~15% to more than ~60% without significant correlation with the mass and the age of the host cluster. Moreover, we detect hints of a correlation between the total fraction of binary stars and the central density of the host cluster. We compared the fraction of binary stars with that of BSSs, finding that clusters with high and low central density exhibit different trends.
The fraction of binaries does not significantly change with the mass of the primary star and the mass ratio. The radial distribution of binary stars depends on cluster age. The binaries of clusters younger than ~800Myr typically show a flat radial distribution, with some hints of a double peak.
In contrast, the binaries of the remaining clusters are more centrally concentrated than the single stars, similar to what is observed in globular clusters.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/672/A29 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023A&A...672A..29C ui.adsabs.harvard.edu/abs/2023A%26A...672A..29C ↗
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/672/a29 ↗
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/672/a29 | 11 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 |