Rotation-based census of blue lurkers Virtual Observatory Resource

Authors
  1. Jadhav V.V.
  2. Rao K.K.
  3. Reggiani E.
  4. Published by
    CDS
Abstract

We have compiled a list of blue lurker (BL) candidates in open clusters using the available rotation catalogs. Blue lurkers are rejuvenated main-sequence stars hidden among normal main-sequence stars on color-magnitude diagrams of star clusters. In comparison to BLs, blue straggler stars, which formed via similar mass transfers or mergers, occupy a distinct space in color-magnitude diagrams. Blue lurkers can be identified by their unusually faster rotation compared to similar mass stars, which is a signature of recent accretion, or by the presence of a companion (e.g., an extremely low mass white dwarf), which can only be formed by mass donation. We searched for fast-rotating stars on the main sequence of open clusters using Kepler, TESS, and spectroscopic rotation indicators, such as rotation periods and vsini measurements. We identified 97 new BL candidates across 35 open clusters, almost tripling the previously known sample of 36. Based on the estimated completeness of ~3%, thousands of BLs are likely hidden within the cluster population. Detailed spectroscopic and time series analyses will be essential to confirming their mass-transfer histories.

Keywords
  1. milky-way-galaxy
  2. open-star-clusters
  3. astrometry
  4. visible-astronomy
  5. photometry
  6. proper-motions
  7. trigonometric-parallax
  8. infrared-astronomy
  9. ultraviolet-astronomy
  10. stellar-radii
  11. effective-temperature
Bibliographic source Bibcode
2026A&A...707A.275J
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A275
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/707/A275

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/707/A275
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/707/A275
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/707/A275
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A275/cluster?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A275/cluster?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A275/cluster?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A275/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A275/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A275/table1?

History

2026-03-19T08:04:29Z
Resource record created
2026-03-19T07:05:45Z
Updated
2026-03-19T08:04:29Z
Created

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr