M dwarfs in the Pleiades Virtual Observatory Resource

Authors
  1. Jackson R.J.
  2. Deliyannis C.P.
  3. Jeffries R.D.
  4. Published by
    CDS
Abstract

Rotation periods obtained with the Kepler satellite have been combined with precise measurements of projected rotation velocity from the WIYN 3.5-m telescope to determine the distribution of projected radii for several hundred low-mass (0.1<=M/M_{sun}_<=0.8), fast-rotating members of the Pleiades cluster. A maximum likelihood modelling technique, that takes account of observational uncertainties, selection effects and censored data, and considers the effects of differential rotation and unresolved binarity, has been used to find that the average radius of these stars is 14+/-2 per cent larger at a given luminosity than predicted by current evolutionary models of Dotter et al. and Baraffe et al. The same models are a reasonable match to the interferometric radii of older, magnetically inactive field M dwarfs, suggesting that the over-radius may be associated with the young, magnetically active nature of the Pleiades objects. No evidence is found for any change in this over-radius above and below the boundary marking the transition to full convection. Published evolutionary models that incorporate either the effects of magnetic inhibition of convection or the blocking of flux by dark star-spots do not individually explain the radius inflation, but a combination of the two effects might. The distribution of projected radii is consistent with the adopted hypothesis of a random spatial orientation of spin axes; strong alignments of the spin vectors into cones with an opening semi-angle <30{deg} can be ruled out. Any plausible but weaker alignment would increase the inferred over-radius.

Keywords
  1. open-star-clusters
  2. m-stars
  3. stellar-masses
  4. infrared-photometry
  5. visible-astronomy
Bibliographic source Bibcode
2018MNRAS.476.3245J
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/476/3245
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/476/3245

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/476/3245
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/476/3245
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/476/3245
IVOA Table Access TAP
http://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).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/476/3245/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/476/3245/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/476/3245/table2?

History

2023-10-10T16:04:27Z
Resource record created
2023-10-10T16:04:27Z
Created
2024-04-16T11:24:32Z
Updated

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