Table · dataset · 2021
gri photometry for 73 stars in NGC419
Listed in IVOA Registry (Virtual Observatory)
Delta Scuti ({delta}Sct) stars have been extensively studied in our Galaxy but far less in extragalactic systems.
Description
Here we study the population of {delta}Sct variables in NGC419, an intermediate-age globular cluster of the Small Magellanic Cloud (SMC), using g, r, and i Gemini-S/Gemini Multi-Object Spectrograph (GMOS) time-series observations. Our goal is to study the role of such variables in the cluster extended main-sequence turnoff (MSTO).
We report the discovery of 54 {delta}Sct stars and three eclipsing binaries in the NGC419 field. We find only a handful of the {delta}Sct stars at the MSTO of NGC419, while the majority are fainter, indicating that the cluster is younger (<~1.2Gyr) than previously thought. Considering their radial distribution, we identify only six {delta}Sct stars as probable members of NGC419, while the 48 remaining are likely {delta}Sct stars of the SMC field.
Read the rest (2 more)
Cluster {delta}Sct stars appear close to the red edge of the MSTO, supporting the idea that the extended MSTO has its origin in an age spread. The 48 field {delta}Sct stars represent the largest detection of {delta}Sct stars made in the SMC. The period distribution of these newly detected {delta}Sct stars (0.04day<~P<~0.15day) is similar to that detected in other systems.
The amplitude distribution (0.05mag<~{Delta}r<~0.60mag) is likely biased because of the lack of low-amplitude stars. We finally use the {delta}Sct stars to calculate distances using different period-luminosity relations. The average distance moduli obtained are 18.76{+/-}0.14mag for NGC419 and 18.86{+/-}0.11mag for the SMC field, which agree with previous measurements.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/120 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021AJ....161..120M ui.adsabs.harvard.edu/abs/2021AJ....161..120M ↗
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/161/120 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 73%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/161/120 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (73%) |
| 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 |