Nearby young stars in Northern hemisphere Virtual Observatory Resource

Authors
  1. Binks A.S.
  2. Jeffries R.D.
  3. Maxted P.F.L.
  4. Published by
    CDS
Abstract

We present a kinematically-unbiased search to identify young, nearby low-mass members of kinematic moving groups (MGs). Objects with both rotation periods shorter than 5 days in the SuperWASP All-Sky Survey and X-ray counterparts in the ROSAT All-Sky Survey were chosen to create a catalog of several thousand rapidly-rotating, X-ray active FGK stars. These objects are expected to be either genuinely young (<200Myr) single stars or tidally-locked spectroscopic binaries. We obtained optical spectra for a sub-sample of 146 stars to determine their ages and kinematics, and in some cases repeat radial velocity (RV) measurements were used to identify binarity. Twenty-six stars are found to have lithium abundances consistent with an age of 200Myr or younger and show no evidence for binarity, and in most cases measurements of Halpha and v sin i support their youthful status. Based on their youth, their radial velocities and estimates of their 3-dimensional kinematics, we find 11 objects that may be members of known MGs, 8 that do not appear associated with any young MG and a further 7 that are close to the kinematics of the recently proposed "Octans-Near" MG, and may be the first members of this MG found in the northern hemisphere. The initial search mechanism was ~18 per cent efficient at identifying likely-single stars younger than 200Myr, of which 80 per cent were early-K spectral types. A more complete survey may result in the detection of new nearby MGs, particularly in the comparatively little sampled northern hemisphere.

Keywords
  1. pre-main-sequence-stars
  2. late-type-stars
Bibliographic source Bibcode
2015MNRAS.452..173B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/452/173
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/452/173
Document Object Identifer DOI
doi:10.26093/cds/vizier.74520173

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/452/173
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/452/173
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/452/173
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/MNRAS/452/173/tlspb?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/452/173/tlspb?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/452/173/tlspb?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/452/173/stars?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/452/173/stars?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/452/173/stars?

History

2015-08-21T11:37:20Z
Resource record created
2015-08-21T11:37:20Z
Created
2024-08-15T20:14:14Z
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