Table · dataset · 2025
SRG/eROSITA sources in the Pleiades
Listed in IVOA Registry (Virtual Observatory)
Using SRG/eROSITA X-ray sky survey data and the optical catalog of 2209 Pleiades cluster members constructed from Gaia data, we have found 850 X-ray sources associated with cluster stars.
Description
More than 650 of them have been detected in X-rays for the first time. At the distance of the Pleiades the nominal sensitivity of eROSITA in this sky region corresponds to a 0.3-2.3keV luminosity L_X_~1.6x10^28^erg/s.
The eROSITA sources associated with the Pleiades radiate with a total luminosity L_X,total_~1.3x10^22^erg/s, which exceeds the X-ray luminosity of the quiet Sun by a million times. A strong, more than a factor of 10, X-ray variability has been recorded for 27 sources. Most of them are known as eruptive optical variable dM stars.
Read the rest (3 more)
R_X_=log(L_X_/L_bol_) for Pleiades stars increases with decreasing effective stellar temperature from R_X_~-5 to R_X_~-2 . The R_X_ distribution of stars is bimodal. The left peak at R_X_~-.43 is formed by FGK stars, while the right peak at R_X_~-3.1 is mostly populated by M stars.
The dependence of R_X_ on the Rossby number R_o_ is different for different spectral types. At small Rossby numbers for K and M stars R_X_~-3 and depends weakly on R_o_. At R_o_>~0.25 a rapid decrease in R_X_ is observed for K stars, while there are no M stars with large Rossby numbers in our sample.
Most of the F and G stars lie in the range of lower values, R_X_~-4.5, but the size of our sample is not enough to characterize in more detail the R_X_-R_o_ relation for them.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/other/AstL/50.780 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2024AstL...50..780K ui.adsabs.harvard.edu/abs/2024AstL...50..780K ↗
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/other/astl/50.780 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/other/astl/50.780 | 15 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 | |
| concepts[modality].ivoa_waveband:x-ray | 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 |