The solar neighborhood .XXXX. New young stars Virtual Observatory Resource

Authors
  1. Bartlett J.L.
  2. Lurie J.C.
  3. Riedel A.
  4. Ianna P.A.
  5. Jao W.-C.
  6. Henry T.J.,Winters J.G.
  7. Finch C.T.
  8. Subasavage J.P.
  9. Published by
    CDS
Abstract

As a step toward completing and characterizing the census of the solar neighborhood, we present astrometric, photometric, and spectroscopic observations of 32 systems observed with the Cerro Tololo Inter-American Observatory 0.9 m and 1.5 m telescopes. Astrometry from the 0.9 m indicates that among the 17 systems that had no previous published trigonometric parallaxes, 14 are within 25 pc. In the full sample, nine systems have proper motions larger than 0.5"/yr, including 2MASS J02511490-0352459, which exceeds 2.0"/yr. VRI photometry from the 0.9 m and optical spectra from the 1.5 m indicate that the targets have V=11-22 mag and spectral types M3.0V-L3.0V. For 2MASS J23062928-0502285 (TRAPPIST-1), we present updated astrometry and photometric variability based on over 12 years of observations. Of the nine binaries in the sample, two promise mass determinations in the next decade: LHS 6167AB, an M4.5V system for which we present an accurate parallax placing the binary at 9.7 pc, and 2MASS J23515048-2537367AB, an M8.5V system at 21.1 pc for which we present the first evidence of an unseen, low-mass companion. Most importantly, Na I and K I gravity indicators, H{alpha} measurements, long-term photometric variability, locations on the H-R diagram, and kinematic assessments indicate that as many as 13 of the systems are young, including candidate members of young moving groups, with ages less than ~120 Myr.

Keywords
  1. multiple-stars
  2. proper-motions
  3. visible-astronomy
  4. trigonometric-parallax
  5. infrared-photometry
  6. photometry
  7. stellar-spectral-types
  8. line-intensities
  9. stellar-distance
Bibliographic source Bibcode
2017AJ....154..151B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/154/151
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/154/151
Document Object Identifer DOI
doi:10.26093/cds/vizier.51540151

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/154/151
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/151/table13?
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/151/table8?

History

2018-08-06T06:20:27Z
Resource record created
2018-08-06T06:20:27Z
Created
2024-10-11T20:09:47Z
Updated

Contact

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