Confirmed members of nearby young moving groups Virtual Observatory Resource

Authors
  1. Baron F.
  2. Lafreniere D.
  3. Artigau E.
  4. Gagne J.
  5. Rameau J.
  6. Delorme P.,Naud M.-E.
  7. Published by
    CDS
Abstract

We present the first statistical analysis of exoplanet direct imaging surveys combining adaptive optics (AO) imaging at small separations with deep seeing-limited observations at large separations allowing us to study the entire orbital separation domain from 5 to 5000 au simultaneously. Our sample of 344 stars includes only confirmed members of nearby young associations and is based on all AO direct-imaging detection limits readily available online, with addition of our own previous seeing-limited surveys. Assuming that the companion distribution in mass and a semimajor axis follows a power-law distribution and adding a dependence on the mass of the host star, such as d^2^{prop.to}fM^{alpha}^a^{beta}^(M_*_/M_{sun}_)^{gamma}^dMda, we constrain the parameters to obtain {alpha}=-0.18_-0.65_^+0.77^, {beta}=-1.43_-0.24_^+0.23^, and {gamma}=0.62_-0.50_^+0.56^ at a 68% confidence level, and we obtain f=0.11_-0.05_^+0.11^ for the overall planet occurrence rate for companions with masses between 1 and 20 M_Jup_ in the range of 5-5000 au. Thus, we find that occurrence of companions is negatively correlated with a semimajor axis and companion mass (marginally) but is positively correlated with the stellar host mass. Our inferred mass distribution is in good agreement with other distributions found previously from direct imaging surveys for planets and brown dwarfs, but is shallower as a function of mass than the distributions inferred by radial velocity surveys of gas giants in the 1-3 au range. This may suggest that planets at these wide and very wide separations represent the low-mass tail of the brown dwarfs and stellar companion distribution rather than an extension of the distribution of the inner planets.

Keywords
  1. stellar-associations
  2. stellar-spectral-types
  3. proper-motions
  4. stellar-distance
  5. stellar-masses
  6. exoplanets
Bibliographic source Bibcode
2019AJ....158..187B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/158/187
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/158/187
Document Object Identifer DOI
doi:10.26093/cds/vizier.51580187

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/158/187
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/158/187
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/158/187
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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/AJ/158/187/table3?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/158/187/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/158/187/table3?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/158/187/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/158/187/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/158/187/table2?

History

2020-01-14T11:42:23Z
Resource record created
2020-01-14T10:50:16Z
Updated
2020-01-14T11:42:23Z
Created

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