Planetary eccentricity-period (PEP) distributions Virtual Observatory Resource

Authors
  1. Bashi D.
  2. Mazeh T.
  3. Faigler S.
  4. Published by
    CDS
Abstract

We used the database of 1040 short-period (1<=P<200days) exoplanets radial-velocity orbits to study the planetary eccentricity-period (PEP) distribution. We first divided the sample into low- and high-mass exoplanet subsamples based on the distribution of the (minimum) planetary masses, which displays a clear two-Gaussian distribution, separated at 0.165M_J_. We then selected 216 orbits, low- and high-mass alike, with eccentricities significantly distinct from circular orbits. The 131 giant-planet eccentric orbits display a clear upper envelope, which we model quantitatively, rises monotonically from zero eccentricity and reaches an eccentricity of 0.8 at P~100 days. Conversely, the 85 low-mass planetary orbits display a flat eccentricity distribution between 0.1 and 0.5, with almost no dependence on the orbital period. We show that the striking difference between the two PEP distributions is not a result of the detection technique used. The upper envelope of the high-mass planets, also seen in short-period binary stars, is a clear signature of tidal circularization, which probably took place inside the planets, while the small-planet PEP distribution suggests that the circularization was not effective, probably due to dynamical interactions with neighboring planets.

Keywords
  1. exoplanets
  2. two-color-diagrams
  3. absolute-magnitude
  4. visible-astronomy
Bibliographic source Bibcode
2024AJ....168..115B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/115
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/168/115

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/115
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/115
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/115
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).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/115/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/115/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/115/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/115/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/115/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/115/table2?

History

2025-02-06T14:46:32Z
Resource record created
2025-02-06T13:55:08Z
Updated
2025-02-06T14:46:32Z
Created

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