Table · dataset · 2026
RR Lyrae stars from Gaia DR3 and ZTF time series
Listed in IVOA Registry (Virtual Observatory)
RR Lyrae (RRL) variable stars are cornerstone distance indicators.
Description
In particular, double-mode RR Lyrae (RRd) stars enable period-luminosity relations (PLRs) that are less sensitive to metallicity, reducing systematic biases in distance measurements. However, their utility has been limited by a global sample of only ~3000 objects.
We develop an automated RRd-screening pipeline and apply it to a crossmatched sample between the Gaia DR3 RRL catalog and Zwicky Transient Facility (ZTF) DR22 time-series photometry. The workflow combines Lomb-Scargle period searches, iterative prewhitening, period-ratio constraints that suppress ~1 day sampling aliases, and amplitude-based quality cuts, enabling large-scale RRd star screening. We produce two ZTF-based catalogs: (i) 39,322 reliable single-mode RRL stars (40.5% of the crossmatched set) and (ii) 969 RRd stars.
Read the rest (2 more)
Among the RRd stars, 614 objects are newly identified, substantially enlarging this previously scarce sample; the catalog achieves an estimated completeness of 47.7%. The PLR derived from the newly discovered RRd stars agrees with the LMC-based relation, though with larger uncertainties. Incorporating these stars will help tighten the RRd PLR and improve distance measurements.
Looking ahead, systematic RRd searches with upcoming surveys such as the Legacy Survey of Space and Time and the China Space Station Telescope should further extend high-accuracy distances across the Local Group and strengthen their cosmological applications.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/281/38 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025ApJS..281...38Z ui.adsabs.harvard.edu/abs/2025ApJS..281...38Z ↗
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/apjs/281/38 ↗
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/apjs/281/38 | 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 |