Multiwavelength view of the open cluster NGC 2527 Virtual Observatory Resource

Authors
  1. Shah N.
  2. Singh K.P.
  3. Subramaniam A.
  4. Published by
    CDS
Abstract

Star clusters are ideal platforms for categorizing X-ray emitting stars and to study X-ray emission as a function of stellar age and activity. We present a comprehensive study of an open star cluster, NGC 2527, by combining data from XMM-UVOT-Gaia. Cluster membership of stars and their photometry are taken from Gaia and cross-matched with XMM and UVOT detections. We estimate the age of NGC 2527 as ~630Myr, reddening as E(B-V)=0.13mag, and a distance of 642+/-30pc using PARSEC isochrones. We detect five sub-subgiants and five bandgap stars, which defy single star evolution. We estimate the temperature, mass, radius, and luminosity of 53 single stars and 10 potential binary stars using a python code that fits single and composite Kurucz spectra to broad-band spectral energy distribution. Among the 12 X-ray emitting members, we find that five are potential RS CVn-type binaries, two are potential FK Comae type of red giant branch (RGB) stars, and five are main sequence (MS) stars with high coronal activity. Members with strong UV emission comprise one RGB star and several MS stars with UV excess suggestive of chromospheric activity. Based on comparison with other clusters, we tentatively suggest that X-ray luminosity of both RS CVn and contact binaries increases with age, suggesting that more active binaries are present in older clusters as compared to younger clusters. This study suggests possible presence of W UMa and FK Comae-type stars in younger (age~630Myr) clusters.

Keywords
  1. open-star-clusters
  2. multiple-stars
  3. milky-way-galaxy
  4. astrometry
  5. stellar-distance
  6. radial-velocity
  7. effective-temperature
  8. stellar-radii
  9. stellar-masses
  10. ultraviolet-astronomy
  11. visible-astronomy
  12. x-ray-sources
Bibliographic source Bibcode
2020MNRAS.493.5565S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/493/5565
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/493/5565

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/493/5565
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/493/5565
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/493/5565
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https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/493/5565/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/493/5565/table3?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/493/5565/tabled?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/493/5565/tabled?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/493/5565/tabled?

History

2023-07-26T08:25:43Z
Resource record created
2023-07-26T07:31:11Z
Updated
2023-07-26T08:25:43Z
Created

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
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